third_party/blink/public/devtools_protocol/browser_protocol.pdl - chromium/src.git - Git at Google

 # Copyright 2017 The Chromium Authors
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # Contributing to Chrome DevTools Protocol: https://goo.gle/devtools-contribution-guide-cdp

 version
   major 1
   minor 3

 experimental domain Accessibility
   depends on DOM

   # Unique accessibility node identifier.
   type AXNodeId extends string

   # Enum of possible property types.
   type AXValueType extends string
     enum
       boolean
       tristate
       booleanOrUndefined
       idref
       idrefList
       integer
       node
       nodeList
       number
       string
       computedString
       token
       tokenList
       domRelation
       role
       internalRole
       valueUndefined

   # Enum of possible property sources.
   type AXValueSourceType extends string
     enum
       attribute
       implicit
       style
       contents
       placeholder
       relatedElement

   # Enum of possible native property sources (as a subtype of a particular AXValueSourceType).
   type AXValueNativeSourceType extends string
     enum
       description
       figcaption
       label
       labelfor
       labelwrapped
       legend
       rubyannotation
       tablecaption
       title
       other

   # A single source for a computed AX property.
   type AXValueSource extends object
     properties
       # What type of source this is.
       AXValueSourceType type
       # The value of this property source.
       optional AXValue value
       # The name of the relevant attribute, if any.
       optional string attribute
       # The value of the relevant attribute, if any.
       optional AXValue attributeValue
       # Whether this source is superseded by a higher priority source.
       optional boolean superseded
       # The native markup source for this value, e.g. a `<label>` element.
       optional AXValueNativeSourceType nativeSource
       # The value, such as a node or node list, of the native source.
       optional AXValue nativeSourceValue
       # Whether the value for this property is invalid.
       optional boolean invalid
       # Reason for the value being invalid, if it is.
       optional string invalidReason

   type AXRelatedNode extends object
     properties
       # The BackendNodeId of the related DOM node.
       DOM.BackendNodeId backendDOMNodeId
       # The IDRef value provided, if any.
       optional string idref
       # The text alternative of this node in the current context.
       optional string text

   type AXProperty extends object
     properties
       # The name of this property.
       AXPropertyName name
       # The value of this property.
       AXValue value

   # A single computed AX property.
   type AXValue extends object
     properties
       # The type of this value.
       AXValueType type
       # The computed value of this property.
       optional any value
       # One or more related nodes, if applicable.
       optional array of AXRelatedNode relatedNodes
       # The sources which contributed to the computation of this property.
       optional array of AXValueSource sources

   # Values of AXProperty name:
   # - from 'busy' to 'roledescription': states which apply to every AX node
   # - from 'live' to 'root': attributes which apply to nodes in live regions
   # - from 'autocomplete' to 'valuetext': attributes which apply to widgets
   # - from 'checked' to 'selected': states which apply to widgets
   # - from 'activedescendant' to 'owns' - relationships between elements other than parent/child/sibling.
   type AXPropertyName extends string
     enum
       actions
       busy
       disabled
       editable
       focusable
       focused
       hidden
       hiddenRoot
       invalid
       keyshortcuts
       settable
       roledescription
       live
       atomic
       relevant
       root
       autocomplete
       hasPopup
       level
       multiselectable
       orientation
       multiline
       readonly
       required
       valuemin
       valuemax
       valuetext
       checked
       expanded
       modal
       pressed
       selected
       activedescendant
       controls
       describedby
       details
       errormessage
       flowto
       labelledby
       owns
       url

   # A node in the accessibility tree.
   type AXNode extends object
     properties
       # Unique identifier for this node.
       AXNodeId nodeId
       # Whether this node is ignored for accessibility
       boolean ignored
       # Collection of reasons why this node is hidden.
       optional array of AXProperty ignoredReasons
       # This `Node`'s role, whether explicit or implicit.
       optional AXValue role
       # This `Node`'s Chrome raw role.
       optional AXValue chromeRole
       # The accessible name for this `Node`.
       optional AXValue name
       # The accessible description for this `Node`.
       optional AXValue description
       # The value for this `Node`.
       optional AXValue value
       # All other properties
       optional array of AXProperty properties
       # ID for this node's parent.
       optional AXNodeId parentId
       # IDs for each of this node's child nodes.
       optional array of AXNodeId childIds
       # The backend ID for the associated DOM node, if any.
       optional DOM.BackendNodeId backendDOMNodeId
       # The frame ID for the frame associated with this nodes document.
       optional Page.FrameId frameId

   # Disables the accessibility domain.
   command disable

   # Enables the accessibility domain which causes `AXNodeId`s to remain consistent between method calls.
   # This turns on accessibility for the page, which can impact performance until accessibility is disabled.
   command enable

   # Fetches the accessibility node and partial accessibility tree for this DOM node, if it exists.
   experimental command getPartialAXTree
     parameters
       # Identifier of the node to get the partial accessibility tree for.
       optional DOM.NodeId nodeId
       # Identifier of the backend node to get the partial accessibility tree for.
       optional DOM.BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper to get the partial accessibility tree for.
       optional Runtime.RemoteObjectId objectId
       # Whether to fetch this node's ancestors, siblings and children. Defaults to true.
       optional boolean fetchRelatives
     returns
       # The `Accessibility.AXNode` for this DOM node, if it exists, plus its ancestors, siblings and
       # children, if requested.
       array of AXNode nodes

   # Fetches the entire accessibility tree for the root Document
   experimental command getFullAXTree
     parameters
       # The maximum depth at which descendants of the root node should be retrieved.
       # If omitted, the full tree is returned.
       optional integer depth
       # The frame for whose document the AX tree should be retrieved.
       # If omitted, the root frame is used.
       optional Page.FrameId frameId
     returns
       array of AXNode nodes

   # Fetches the root node.
   # Requires `enable()` to have been called previously.
   experimental command getRootAXNode
     parameters
       # The frame in whose document the node resides.
       # If omitted, the root frame is used.
       optional Page.FrameId frameId
     returns
       AXNode node

   # Fetches a node and all ancestors up to and including the root.
   # Requires `enable()` to have been called previously.
   experimental command getAXNodeAndAncestors
     parameters
       # Identifier of the node to get.
       optional DOM.NodeId nodeId
       # Identifier of the backend node to get.
       optional DOM.BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper to get.
       optional Runtime.RemoteObjectId objectId
     returns
       array of AXNode nodes

   # Fetches a particular accessibility node by AXNodeId.
   # Requires `enable()` to have been called previously.
   experimental command getChildAXNodes
     parameters
       AXNodeId id
       # The frame in whose document the node resides.
       # If omitted, the root frame is used.
       optional Page.FrameId frameId
     returns
       array of AXNode nodes

   # Query a DOM node's accessibility subtree for accessible name and role.
   # This command computes the name and role for all nodes in the subtree, including those that are
   # ignored for accessibility, and returns those that match the specified name and role. If no DOM
   # node is specified, or the DOM node does not exist, the command returns an error. If neither
   # `accessibleName` or `role` is specified, it returns all the accessibility nodes in the subtree.
   experimental command queryAXTree
     parameters
       # Identifier of the node for the root to query.
       optional DOM.NodeId nodeId
       # Identifier of the backend node for the root to query.
       optional DOM.BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper for the root to query.
       optional Runtime.RemoteObjectId objectId
       # Find nodes with this computed name.
       optional string accessibleName
       # Find nodes with this computed role.
       optional string role
     returns
       # A list of `Accessibility.AXNode` matching the specified attributes,
       # including nodes that are ignored for accessibility.
       array of AXNode nodes

   # The loadComplete event mirrors the load complete event sent by the browser to assistive
   # technology when the web page has finished loading.
   experimental event loadComplete
     parameters
       # New document root node.
       AXNode root

   # The nodesUpdated event is sent every time a previously requested node has changed the in tree.
   experimental event nodesUpdated
     parameters
       # Updated node data.
       array of AXNode nodes

 experimental domain Animation
   depends on Runtime
   depends on DOM

   # Animation instance.
   type Animation extends object
     properties
       # `Animation`'s id.
       string id
       # `Animation`'s name.
       string name
       # `Animation`'s internal paused state.
       boolean pausedState
       # `Animation`'s play state.
       string playState
       # `Animation`'s playback rate.
       number playbackRate
       # `Animation`'s start time.
       # Milliseconds for time based animations and
       # percentage [0 - 100] for scroll driven animations
       # (i.e. when viewOrScrollTimeline exists).
       number startTime
       # `Animation`'s current time.
       number currentTime
       # Animation type of `Animation`.
       enum type
         CSSTransition
         CSSAnimation
         WebAnimation
       # `Animation`'s source animation node.
       optional AnimationEffect source
       # A unique ID for `Animation` representing the sources that triggered this CSS
       # animation/transition.
       optional string cssId
       # View or scroll timeline
       optional ViewOrScrollTimeline viewOrScrollTimeline

   # Timeline instance
   type ViewOrScrollTimeline extends object
     properties
       # Scroll container node
       optional DOM.BackendNodeId sourceNodeId
       # Represents the starting scroll position of the timeline
       # as a length offset in pixels from scroll origin.
       optional number startOffset
       # Represents the ending scroll position of the timeline
       # as a length offset in pixels from scroll origin.
       optional number endOffset
       # The element whose principal box's visibility in the
       # scrollport defined the progress of the timeline.
       # Does not exist for animations with ScrollTimeline
       optional DOM.BackendNodeId subjectNodeId
       # Orientation of the scroll
       DOM.ScrollOrientation axis

   # AnimationEffect instance
   type AnimationEffect extends object
     properties
       # `AnimationEffect`'s delay.
       number delay
       # `AnimationEffect`'s end delay.
       number endDelay
       # `AnimationEffect`'s iteration start.
       number iterationStart
       # `AnimationEffect`'s iterations.
       number iterations
       # `AnimationEffect`'s iteration duration.
       # Milliseconds for time based animations and
       # percentage [0 - 100] for scroll driven animations
       # (i.e. when viewOrScrollTimeline exists).
       number duration
       # `AnimationEffect`'s playback direction.
       string direction
       # `AnimationEffect`'s fill mode.
       string fill
       # `AnimationEffect`'s target node.
       optional DOM.BackendNodeId backendNodeId
       # `AnimationEffect`'s keyframes.
       optional KeyframesRule keyframesRule
       # `AnimationEffect`'s timing function.
       string easing

   # Keyframes Rule
   type KeyframesRule extends object
     properties
       # CSS keyframed animation's name.
       optional string name
       # List of animation keyframes.
       array of KeyframeStyle keyframes

   # Keyframe Style
   type KeyframeStyle extends object
     properties
       # Keyframe's time offset.
       string offset
       # `AnimationEffect`'s timing function.
       string easing

   # Disables animation domain notifications.
   command disable

   # Enables animation domain notifications.
   command enable

   # Returns the current time of the an animation.
   command getCurrentTime
     parameters
       # Id of animation.
       string id
     returns
       # Current time of the page.
       number currentTime

   # Gets the playback rate of the document timeline.
   command getPlaybackRate
     returns
       # Playback rate for animations on page.
       number playbackRate

   # Releases a set of animations to no longer be manipulated.
   command releaseAnimations
     parameters
       # List of animation ids to seek.
       array of string animations

   # Gets the remote object of the Animation.
   command resolveAnimation
     parameters
       # Animation id.
       string animationId
     returns
       # Corresponding remote object.
       Runtime.RemoteObject remoteObject

   # Seek a set of animations to a particular time within each animation.
   command seekAnimations
     parameters
       # List of animation ids to seek.
       array of string animations
       # Set the current time of each animation.
       number currentTime

   # Sets the paused state of a set of animations.
   command setPaused
     parameters
       # Animations to set the pause state of.
       array of string animations
       # Paused state to set to.
       boolean paused

   # Sets the playback rate of the document timeline.
   command setPlaybackRate
     parameters
       # Playback rate for animations on page
       number playbackRate

   # Sets the timing of an animation node.
   command setTiming
     parameters
       # Animation id.
       string animationId
       # Duration of the animation.
       number duration
       # Delay of the animation.
       number delay

   # Event for when an animation has been cancelled.
   event animationCanceled
     parameters
       # Id of the animation that was cancelled.
       string id

   # Event for each animation that has been created.
   event animationCreated
     parameters
       # Id of the animation that was created.
       string id

   # Event for animation that has been started.
   event animationStarted
     parameters
       # Animation that was started.
       Animation animation

   # Event for animation that has been updated.
   event animationUpdated
     parameters
       # Animation that was updated.
       Animation animation

 # Audits domain allows investigation of page violations and possible improvements.
 experimental domain Audits
   depends on Network

   # Information about a cookie that is affected by an inspector issue.
   type AffectedCookie extends object
     properties
       # The following three properties uniquely identify a cookie
       string name
       string path
       string domain

   # Information about a request that is affected by an inspector issue.
   type AffectedRequest extends object
     properties
       # The unique request id.
       optional Network.RequestId requestId
       string url

   # Information about the frame affected by an inspector issue.
   type AffectedFrame extends object
     properties
       Page.FrameId frameId

   type CookieExclusionReason extends string
     enum
       ExcludeSameSiteUnspecifiedTreatedAsLax
       ExcludeSameSiteNoneInsecure
       ExcludeSameSiteLax
       ExcludeSameSiteStrict
       ExcludeInvalidSameParty
       ExcludeSamePartyCrossPartyContext
       ExcludeDomainNonASCII
       ExcludeThirdPartyCookieBlockedInFirstPartySet
       ExcludeThirdPartyPhaseout
       ExcludePortMismatch
       ExcludeSchemeMismatch

   type CookieWarningReason extends string
     enum
       WarnSameSiteUnspecifiedCrossSiteContext
       WarnSameSiteNoneInsecure
       WarnSameSiteUnspecifiedLaxAllowUnsafe
       WarnSameSiteStrictLaxDowngradeStrict
       WarnSameSiteStrictCrossDowngradeStrict
       WarnSameSiteStrictCrossDowngradeLax
       WarnSameSiteLaxCrossDowngradeStrict
       WarnSameSiteLaxCrossDowngradeLax
       WarnAttributeValueExceedsMaxSize
       WarnDomainNonASCII
       WarnThirdPartyPhaseout
       WarnCrossSiteRedirectDowngradeChangesInclusion
       WarnDeprecationTrialMetadata
       WarnThirdPartyCookieHeuristic

   type CookieOperation extends string
     enum
       SetCookie
       ReadCookie

   # Represents the category of insight that a cookie issue falls under.
   type InsightType extends string
     enum
       # Cookie domain has an entry in third-party cookie migration readiness
       # list:
       # https://github.com/privacysandbox/privacy-sandbox-dev-support/blob/main/3pc-migration-readiness.md
       GitHubResource
       # Cookie is exempted due to a grace period:
       # https://developers.google.com/privacy-sandbox/cookies/temporary-exceptions/grace-period
       GracePeriod
       # Cookie is exempted due a heuristics-based exemptiuon:
       # https://developers.google.com/privacy-sandbox/cookies/temporary-exceptions/heuristics-based-exception
       Heuristics

   # Information about the suggested solution to a cookie issue.
   type CookieIssueInsight extends object
     properties
       InsightType type
       # Link to table entry in third-party cookie migration readiness list.
       optional string tableEntryUrl

   # This information is currently necessary, as the front-end has a difficult
   # time finding a specific cookie. With this, we can convey specific error
   # information without the cookie.
   type CookieIssueDetails extends object
     properties
       # If AffectedCookie is not set then rawCookieLine contains the raw
       # Set-Cookie header string. This hints at a problem where the
       # cookie line is syntactically or semantically malformed in a way
       # that no valid cookie could be created.
       optional AffectedCookie cookie
       optional string rawCookieLine
       array of CookieWarningReason cookieWarningReasons
       array of CookieExclusionReason cookieExclusionReasons
       # Optionally identifies the site-for-cookies and the cookie url, which
       # may be used by the front-end as additional context.
       CookieOperation operation
       optional string siteForCookies
       optional string cookieUrl
       optional AffectedRequest request
       # The recommended solution to the issue.
       optional CookieIssueInsight insight

   type MixedContentResolutionStatus extends string
     enum
       MixedContentBlocked
       MixedContentAutomaticallyUpgraded
       MixedContentWarning

   type MixedContentResourceType extends string
     enum
       AttributionSrc
       Audio
       Beacon
       CSPReport
       Download
       EventSource
       Favicon
       Font
       Form
       Frame
       Image
       Import
       JSON
       Manifest
       Ping
       PluginData
       PluginResource
       Prefetch
       Resource
       Script
       ServiceWorker
       SharedWorker
       SpeculationRules
       Stylesheet
       Track
       Video
       Worker
       XMLHttpRequest
       XSLT

   type MixedContentIssueDetails extends object
     properties
       # The type of resource causing the mixed content issue (css, js, iframe,
       # form,...). Marked as optional because it is mapped to from
       # blink::mojom::RequestContextType, which will be replaced
       # by network::mojom::RequestDestination
       optional MixedContentResourceType resourceType
       # The way the mixed content issue is being resolved.
       MixedContentResolutionStatus resolutionStatus
       # The unsafe http url causing the mixed content issue.
       string insecureURL
       # The url responsible for the call to an unsafe url.
       string mainResourceURL
       # The mixed content request.
       # Does not always exist (e.g. for unsafe form submission urls).
       optional AffectedRequest request
       # Optional because not every mixed content issue is necessarily linked to a frame.
       optional AffectedFrame frame

   # Enum indicating the reason a response has been blocked. These reasons are
   # refinements of the net error BLOCKED_BY_RESPONSE.
   type BlockedByResponseReason extends string
     enum
       CoepFrameResourceNeedsCoepHeader
       CoopSandboxedIFrameCannotNavigateToCoopPage
       CorpNotSameOrigin
       CorpNotSameOriginAfterDefaultedToSameOriginByCoep
       CorpNotSameOriginAfterDefaultedToSameOriginByDip
       CorpNotSameOriginAfterDefaultedToSameOriginByCoepAndDip
       CorpNotSameSite
       SRIMessageSignatureMismatch

   # Details for a request that has been blocked with the BLOCKED_BY_RESPONSE
   # code. Currently only used for COEP/COOP, but may be extended to include
   # some CSP errors in the future.
   type BlockedByResponseIssueDetails extends object
     properties
       AffectedRequest request
       optional AffectedFrame parentFrame
       optional AffectedFrame blockedFrame
       BlockedByResponseReason reason

   type HeavyAdResolutionStatus extends string
     enum
       HeavyAdBlocked
       HeavyAdWarning

   type HeavyAdReason extends string
     enum
       NetworkTotalLimit
       CpuTotalLimit
       CpuPeakLimit

   type HeavyAdIssueDetails extends object
     properties
       # The resolution status, either blocking the content or warning.
       HeavyAdResolutionStatus resolution
       # The reason the ad was blocked, total network or cpu or peak cpu.
       HeavyAdReason reason
       # The frame that was blocked.
       AffectedFrame frame

   type ContentSecurityPolicyViolationType extends string
     enum
       kInlineViolation
       kEvalViolation
       kURLViolation
       kSRIViolation
       kTrustedTypesSinkViolation
       kTrustedTypesPolicyViolation
       kWasmEvalViolation

   type SourceCodeLocation extends object
     properties
       optional Runtime.ScriptId scriptId
       string url
       integer lineNumber
       integer columnNumber

   type ContentSecurityPolicyIssueDetails extends object
     properties
       # The url not included in allowed sources.
       optional string blockedURL
       # Specific directive that is violated, causing the CSP issue.
       string violatedDirective
       boolean isReportOnly
       ContentSecurityPolicyViolationType contentSecurityPolicyViolationType
       optional AffectedFrame frameAncestor
       optional SourceCodeLocation sourceCodeLocation
       optional DOM.BackendNodeId violatingNodeId

   type SharedArrayBufferIssueType extends string
     enum
       TransferIssue
       CreationIssue

   # Details for a issue arising from an SAB being instantiated in, or
   # transferred to a context that is not cross-origin isolated.
   type SharedArrayBufferIssueDetails extends object
     properties
       SourceCodeLocation sourceCodeLocation
       boolean isWarning
       SharedArrayBufferIssueType type

   type LowTextContrastIssueDetails extends object
     properties
       DOM.BackendNodeId violatingNodeId
       string violatingNodeSelector
       number contrastRatio
       number thresholdAA
       number thresholdAAA
       string fontSize
       string fontWeight

   # Details for a CORS related issue, e.g. a warning or error related to
   # CORS RFC1918 enforcement.
   type CorsIssueDetails extends object
     properties
       Network.CorsErrorStatus corsErrorStatus
       boolean isWarning
       AffectedRequest request
       optional SourceCodeLocation location
       optional string initiatorOrigin
       optional Network.IPAddressSpace resourceIPAddressSpace
       optional Network.ClientSecurityState clientSecurityState

   type AttributionReportingIssueType extends string
     enum
       PermissionPolicyDisabled
       UntrustworthyReportingOrigin
       InsecureContext
       # TODO(apaseltiner): Rename this to InvalidRegisterSourceHeader
       InvalidHeader
       InvalidRegisterTriggerHeader
       SourceAndTriggerHeaders
       SourceIgnored
       TriggerIgnored
       OsSourceIgnored
       OsTriggerIgnored
       InvalidRegisterOsSourceHeader
       InvalidRegisterOsTriggerHeader
       WebAndOsHeaders
       NoWebOrOsSupport
       NavigationRegistrationWithoutTransientUserActivation
       InvalidInfoHeader
       NoRegisterSourceHeader
       NoRegisterTriggerHeader
       NoRegisterOsSourceHeader
       NoRegisterOsTriggerHeader
       NavigationRegistrationUniqueScopeAlreadySet

   type SharedDictionaryError extends string
     enum
       UseErrorCrossOriginNoCorsRequest
       UseErrorDictionaryLoadFailure
       UseErrorMatchingDictionaryNotUsed
       UseErrorUnexpectedContentDictionaryHeader
       WriteErrorCossOriginNoCorsRequest
       WriteErrorDisallowedBySettings
       WriteErrorExpiredResponse
       WriteErrorFeatureDisabled
       WriteErrorInsufficientResources
       WriteErrorInvalidMatchField
       WriteErrorInvalidStructuredHeader
       WriteErrorNavigationRequest
       WriteErrorNoMatchField
       WriteErrorNonListMatchDestField
       WriteErrorNonSecureContext
       WriteErrorNonStringIdField
       WriteErrorNonStringInMatchDestList
       WriteErrorNonStringMatchField
       WriteErrorNonTokenTypeField
       WriteErrorRequestAborted
       WriteErrorShuttingDown
       WriteErrorTooLongIdField
       WriteErrorUnsupportedType

   type SRIMessageSignatureError extends string
     enum
       MissingSignatureHeader
       MissingSignatureInputHeader
       InvalidSignatureHeader
       InvalidSignatureInputHeader
       SignatureHeaderValueIsNotByteSequence
       SignatureHeaderValueIsParameterized
       SignatureHeaderValueIsIncorrectLength
       SignatureInputHeaderMissingLabel
       SignatureInputHeaderValueNotInnerList
       SignatureInputHeaderValueMissingComponents
       SignatureInputHeaderInvalidComponentType
       SignatureInputHeaderInvalidComponentName
       SignatureInputHeaderInvalidHeaderComponentParameter
       SignatureInputHeaderInvalidDerivedComponentParameter
       SignatureInputHeaderKeyIdLength
       SignatureInputHeaderInvalidParameter
       SignatureInputHeaderMissingRequiredParameters
       ValidationFailedSignatureExpired
       ValidationFailedInvalidLength
       ValidationFailedSignatureMismatch
       ValidationFailedIntegrityMismatch

   # Details for issues around "Attribution Reporting API" usage.
   # Explainer: https://github.com/WICG/attribution-reporting-api
   type AttributionReportingIssueDetails extends object
     properties
       AttributionReportingIssueType violationType
       optional AffectedRequest request
       optional DOM.BackendNodeId violatingNodeId
       optional string invalidParameter

 # Details for issues about documents in Quirks Mode
 # or Limited Quirks Mode that affects page layouting.
   type QuirksModeIssueDetails extends object
     properties
       # If false, it means the document's mode is "quirks"
       # instead of "limited-quirks".
       boolean isLimitedQuirksMode
       DOM.BackendNodeId documentNodeId
       string url
       Page.FrameId frameId
       Network.LoaderId loaderId

   deprecated type NavigatorUserAgentIssueDetails extends object
     properties
       string url
       optional SourceCodeLocation location

   type SharedDictionaryIssueDetails extends object
     properties
       SharedDictionaryError sharedDictionaryError
       AffectedRequest request

   type SRIMessageSignatureIssueDetails extends object
     properties
       SRIMessageSignatureError error
       string signatureBase
       array of string integrityAssertions
       AffectedRequest request

   type GenericIssueErrorType extends string
     enum
       FormLabelForNameError
       FormDuplicateIdForInputError
       FormInputWithNoLabelError
       FormAutocompleteAttributeEmptyError
       FormEmptyIdAndNameAttributesForInputError
       FormAriaLabelledByToNonExistingId
       FormInputAssignedAutocompleteValueToIdOrNameAttributeError
       FormLabelHasNeitherForNorNestedInput
       FormLabelForMatchesNonExistingIdError
       FormInputHasWrongButWellIntendedAutocompleteValueError
       ResponseWasBlockedByORB

   # Depending on the concrete errorType, different properties are set.
   type GenericIssueDetails extends object
     properties
       # Issues with the same errorType are aggregated in the frontend.
       GenericIssueErrorType errorType
       optional Page.FrameId frameId
       optional DOM.BackendNodeId violatingNodeId
       optional string violatingNodeAttribute
       optional AffectedRequest request

   # This issue tracks information needed to print a deprecation message.
   # https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/core/frame/third_party/blink/renderer/core/frame/deprecation/README.md
   type DeprecationIssueDetails extends object
     properties
       optional AffectedFrame affectedFrame
       SourceCodeLocation sourceCodeLocation
       # One of the deprecation names from third_party/blink/renderer/core/frame/deprecation/deprecation.json5
       string type

   # This issue warns about sites in the redirect chain of a finished navigation
   # that may be flagged as trackers and have their state cleared if they don't
   # receive a user interaction. Note that in this context 'site' means eTLD+1.
   # For example, if the URL `https://example.test:80/bounce` was in the
   # redirect chain, the site reported would be `example.test`.
   type BounceTrackingIssueDetails extends object
     properties
       array of string trackingSites

   # This issue warns about third-party sites that are accessing cookies on the
   # current page, and have been permitted due to having a global metadata grant.
   # Note that in this context 'site' means eTLD+1. For example, if the URL
   # `https://example.test:80/web_page` was accessing cookies, the site reported
   # would be `example.test`.
   type CookieDeprecationMetadataIssueDetails extends object
     properties
       array of string allowedSites
       number optOutPercentage
       boolean isOptOutTopLevel
       CookieOperation operation

   type ClientHintIssueReason extends string
     enum
       # Items in the accept-ch meta tag allow list must be valid origins.
       # No special values (e.g. self, none, and *) are permitted.
       MetaTagAllowListInvalidOrigin
       # Only accept-ch meta tags in the original HTML sent from the server
       # are respected. Any injected via javascript (or other means) are ignored.
       MetaTagModifiedHTML

   type FederatedAuthRequestIssueDetails extends object
     properties
       FederatedAuthRequestIssueReason federatedAuthRequestIssueReason

   # Represents the failure reason when a federated authentication reason fails.
   # Should be updated alongside RequestIdTokenStatus in
   # third_party/blink/public/mojom/devtools/inspector_issue.mojom to include
   # all cases except for success.
   type FederatedAuthRequestIssueReason extends string
     enum
       ShouldEmbargo
       TooManyRequests
       WellKnownHttpNotFound
       WellKnownNoResponse
       WellKnownInvalidResponse
       WellKnownListEmpty
       WellKnownInvalidContentType
       ConfigNotInWellKnown
       WellKnownTooBig
       ConfigHttpNotFound
       ConfigNoResponse
       ConfigInvalidResponse
       ConfigInvalidContentType
       ClientMetadataHttpNotFound
       ClientMetadataNoResponse
       ClientMetadataInvalidResponse
       ClientMetadataInvalidContentType
       IdpNotPotentiallyTrustworthy
       DisabledInSettings
       DisabledInFlags
       ErrorFetchingSignin
       InvalidSigninResponse
       AccountsHttpNotFound
       AccountsNoResponse
       AccountsInvalidResponse
       AccountsListEmpty
       AccountsInvalidContentType
       IdTokenHttpNotFound
       IdTokenNoResponse
       IdTokenInvalidResponse
       IdTokenIdpErrorResponse
       IdTokenCrossSiteIdpErrorResponse
       IdTokenInvalidRequest
       IdTokenInvalidContentType
       ErrorIdToken
       Canceled
       RpPageNotVisible
       SilentMediationFailure
       ThirdPartyCookiesBlocked
       NotSignedInWithIdp
       MissingTransientUserActivation
       ReplacedByActiveMode
       InvalidFieldsSpecified
       RelyingPartyOriginIsOpaque
       TypeNotMatching
       UiDismissedNoEmbargo
       CorsError
       SuppressedBySegmentationPlatform

   type FederatedAuthUserInfoRequestIssueDetails extends object
     properties
       FederatedAuthUserInfoRequestIssueReason federatedAuthUserInfoRequestIssueReason

   # Represents the failure reason when a getUserInfo() call fails.
   # Should be updated alongside FederatedAuthUserInfoRequestResult in
   # third_party/blink/public/mojom/devtools/inspector_issue.mojom.
   type FederatedAuthUserInfoRequestIssueReason extends string
     enum
       NotSameOrigin
       NotIframe
       NotPotentiallyTrustworthy
       NoApiPermission
       NotSignedInWithIdp
       NoAccountSharingPermission
       InvalidConfigOrWellKnown
       InvalidAccountsResponse
       NoReturningUserFromFetchedAccounts

   # This issue tracks client hints related issues. It's used to deprecate old
   # features, encourage the use of new ones, and provide general guidance.
   type ClientHintIssueDetails extends object
     properties
       SourceCodeLocation sourceCodeLocation
       ClientHintIssueReason clientHintIssueReason

   type FailedRequestInfo extends object
     properties
       # The URL that failed to load.
       string url
       # The failure message for the failed request.
       string failureMessage
       optional Network.RequestId requestId

   type PartitioningBlobURLInfo extends string
     enum
       BlockedCrossPartitionFetching
       EnforceNoopenerForNavigation

   type PartitioningBlobURLIssueDetails extends object
     properties
       # The BlobURL that failed to load.
       string url
       # Additional information about the Partitioning Blob URL issue.
       PartitioningBlobURLInfo partitioningBlobURLInfo

   type SelectElementAccessibilityIssueReason extends string
     enum
       DisallowedSelectChild
       DisallowedOptGroupChild
       NonPhrasingContentOptionChild
       InteractiveContentOptionChild
       InteractiveContentLegendChild

   # This issue warns about errors in the select element content model.
   type SelectElementAccessibilityIssueDetails extends object
     properties
       DOM.BackendNodeId nodeId
       SelectElementAccessibilityIssueReason selectElementAccessibilityIssueReason
       boolean hasDisallowedAttributes

   type StyleSheetLoadingIssueReason extends string
     enum
       LateImportRule
       RequestFailed

   # This issue warns when a referenced stylesheet couldn't be loaded.
   type StylesheetLoadingIssueDetails extends object
     properties
       # Source code position that referenced the failing stylesheet.
       SourceCodeLocation sourceCodeLocation
       # Reason why the stylesheet couldn't be loaded.
       StyleSheetLoadingIssueReason styleSheetLoadingIssueReason
       # Contains additional info when the failure was due to a request.
       optional FailedRequestInfo failedRequestInfo

   type PropertyRuleIssueReason extends string
     enum
       InvalidSyntax
       InvalidInitialValue
       InvalidInherits
       InvalidName

   # This issue warns about errors in property rules that lead to property
   # registrations being ignored.
   type PropertyRuleIssueDetails extends object
     properties
       # Source code position of the property rule.
       SourceCodeLocation sourceCodeLocation
       # Reason why the property rule was discarded.
       PropertyRuleIssueReason propertyRuleIssueReason
       # The value of the property rule property that failed to parse
       optional string propertyValue

   type UserReidentificationIssueType extends string
     enum
       BlockedFrameNavigation
       BlockedSubresource

   # This issue warns about uses of APIs that may be considered misuse to
   # re-identify users.
   type UserReidentificationIssueDetails extends object
     properties
       UserReidentificationIssueType type
       # Applies to BlockedFrameNavigation and BlockedSubresource issue types.
       optional AffectedRequest request

   # A unique identifier for the type of issue. Each type may use one of the
   # optional fields in InspectorIssueDetails to convey more specific
   # information about the kind of issue.
   type InspectorIssueCode extends string
     enum
       CookieIssue
       MixedContentIssue
       BlockedByResponseIssue
       HeavyAdIssue
       ContentSecurityPolicyIssue
       SharedArrayBufferIssue
       LowTextContrastIssue
       CorsIssue
       AttributionReportingIssue
       QuirksModeIssue
       PartitioningBlobURLIssue
       # Deprecated
       NavigatorUserAgentIssue
       GenericIssue
       DeprecationIssue
       ClientHintIssue
       FederatedAuthRequestIssue
       BounceTrackingIssue
       CookieDeprecationMetadataIssue
       StylesheetLoadingIssue
       FederatedAuthUserInfoRequestIssue
       PropertyRuleIssue
       SharedDictionaryIssue
       SelectElementAccessibilityIssue
       SRIMessageSignatureIssue
       UserReidentificationIssue

   # This struct holds a list of optional fields with additional information
   # specific to the kind of issue. When adding a new issue code, please also
   # add a new optional field to this type.
   type InspectorIssueDetails extends object
     properties
       optional CookieIssueDetails cookieIssueDetails
       optional MixedContentIssueDetails mixedContentIssueDetails
       optional BlockedByResponseIssueDetails blockedByResponseIssueDetails
       optional HeavyAdIssueDetails heavyAdIssueDetails
       optional ContentSecurityPolicyIssueDetails contentSecurityPolicyIssueDetails
       optional SharedArrayBufferIssueDetails sharedArrayBufferIssueDetails
       optional LowTextContrastIssueDetails lowTextContrastIssueDetails
       optional CorsIssueDetails corsIssueDetails
       optional AttributionReportingIssueDetails attributionReportingIssueDetails
       optional QuirksModeIssueDetails quirksModeIssueDetails
       optional PartitioningBlobURLIssueDetails partitioningBlobURLIssueDetails
       deprecated optional NavigatorUserAgentIssueDetails navigatorUserAgentIssueDetails
       optional GenericIssueDetails genericIssueDetails
       optional DeprecationIssueDetails deprecationIssueDetails
       optional ClientHintIssueDetails clientHintIssueDetails
       optional FederatedAuthRequestIssueDetails federatedAuthRequestIssueDetails
       optional BounceTrackingIssueDetails bounceTrackingIssueDetails
       optional CookieDeprecationMetadataIssueDetails cookieDeprecationMetadataIssueDetails
       optional StylesheetLoadingIssueDetails stylesheetLoadingIssueDetails
       optional PropertyRuleIssueDetails propertyRuleIssueDetails
       optional FederatedAuthUserInfoRequestIssueDetails federatedAuthUserInfoRequestIssueDetails
       optional SharedDictionaryIssueDetails sharedDictionaryIssueDetails
       optional SelectElementAccessibilityIssueDetails selectElementAccessibilityIssueDetails
       optional SRIMessageSignatureIssueDetails sriMessageSignatureIssueDetails
       optional UserReidentificationIssueDetails userReidentificationIssueDetails

   # A unique id for a DevTools inspector issue. Allows other entities (e.g.
   # exceptions, CDP message, console messages, etc.) to reference an issue.
   type IssueId extends string

   # An inspector issue reported from the back-end.
   type InspectorIssue extends object
     properties
       InspectorIssueCode code
       InspectorIssueDetails details
       # A unique id for this issue. May be omitted if no other entity (e.g.
       # exception, CDP message, etc.) is referencing this issue.
       optional IssueId issueId

   # Returns the response body and size if it were re-encoded with the specified settings. Only
   # applies to images.
   command getEncodedResponse
     parameters
       # Identifier of the network request to get content for.
       Network.RequestId requestId
       # The encoding to use.
       enum encoding
         webp
         jpeg
         png
       # The quality of the encoding (0-1). (defaults to 1)
       optional number quality
       # Whether to only return the size information (defaults to false).
       optional boolean sizeOnly
     returns
       # The encoded body as a base64 string. Omitted if sizeOnly is true.
       optional binary body
       # Size before re-encoding.
       integer originalSize
       # Size after re-encoding.
       integer encodedSize

   # Disables issues domain, prevents further issues from being reported to the client.
   command disable

   # Enables issues domain, sends the issues collected so far to the client by means of the
   # `issueAdded` event.
   command enable

   # Runs the contrast check for the target page. Found issues are reported
   # using Audits.issueAdded event.
   command checkContrast
     parameters
       # Whether to report WCAG AAA level issues. Default is false.
       optional boolean reportAAA

   # Runs the form issues check for the target page. Found issues are reported
   # using Audits.issueAdded event.
   command checkFormsIssues
     returns
       array of GenericIssueDetails formIssues

   event issueAdded
     parameters
       InspectorIssue issue

 # Defines commands and events for browser extensions.
 experimental domain Extensions
   # Storage areas.
   type StorageArea extends string
     enum
       session
       local
       sync
       managed
   # Installs an unpacked extension from the filesystem similar to
   # --load-extension CLI flags. Returns extension ID once the extension
   # has been installed. Available if the client is connected using the
   # --remote-debugging-pipe flag and the --enable-unsafe-extension-debugging
   # flag is set.
   command loadUnpacked
     parameters
       # Absolute file path.
       string path
     returns
       # Extension id.
       string id
   # Uninstalls an unpacked extension (others not supported) from the profile.
   # Available if the client is connected using the --remote-debugging-pipe flag
   # and the --enable-unsafe-extension-debugging.
   command uninstall
     parameters
       # Extension id.
       string id
   # Gets data from extension storage in the given `storageArea`. If `keys` is
   # specified, these are used to filter the result.
   command getStorageItems
     parameters
       # ID of extension.
       string id
       # StorageArea to retrieve data from.
       StorageArea storageArea
       # Keys to retrieve.
       optional array of string keys
     returns
       object data
   # Removes `keys` from extension storage in the given `storageArea`.
   command removeStorageItems
     parameters
       # ID of extension.
       string id
       # StorageArea to remove data from.
       StorageArea storageArea
       # Keys to remove.
       array of string keys
   # Clears extension storage in the given `storageArea`.
   command clearStorageItems
     parameters
       # ID of extension.
       string id
       # StorageArea to remove data from.
       StorageArea storageArea
   # Sets `values` in extension storage in the given `storageArea`. The provided `values`
   # will be merged with existing values in the storage area.
   command setStorageItems
     parameters
       # ID of extension.
       string id
       # StorageArea to set data in.
       StorageArea storageArea
       # Values to set.
       object values

 # Defines commands and events for Autofill.
 experimental domain Autofill
   type CreditCard extends object
     properties
       # 16-digit credit card number.
       string number
       # Name of the credit card owner.
       string name
       # 2-digit expiry month.
       string expiryMonth
       # 4-digit expiry year.
       string expiryYear
       # 3-digit card verification code.
       string cvc

   type AddressField extends object
     properties
       # address field name, for example GIVEN_NAME.
       string name
       # address field value, for example Jon Doe.
       string value

   # A list of address fields.
   type AddressFields extends object
     properties
       array of AddressField fields

   type Address extends object
     properties
       # fields and values defining an address.
       array of AddressField fields

   # Defines how an address can be displayed like in chrome://settings/addresses.
   # Address UI is a two dimensional array, each inner array is an "address information line", and when rendered in a UI surface should be displayed as such.
   # The following address UI for instance:
   # [[{name: "GIVE_NAME", value: "Jon"}, {name: "FAMILY_NAME", value: "Doe"}], [{name: "CITY", value: "Munich"}, {name: "ZIP", value: "81456"}]]
   # should allow the receiver to render:
   # Jon Doe
   # Munich 81456
   type AddressUI extends object
     properties
       # A two dimension array containing the representation of values from an address profile.
       array of AddressFields addressFields

   # Specified whether a filled field was done so by using the html autocomplete attribute or autofill heuristics.
   type FillingStrategy extends string
     enum
       autocompleteAttribute
       autofillInferred

   type FilledField extends object
     properties
       # The type of the field, e.g text, password etc.
       string htmlType
       # the html id
       string id
       # the html name
       string name
       # the field value
       string value
       # The actual field type, e.g FAMILY_NAME
       string autofillType
       # The filling strategy
       FillingStrategy fillingStrategy
       # The frame the field belongs to
       Page.FrameId frameId
       # The form field's DOM node
       DOM.BackendNodeId fieldId

   # Emitted when an address form is filled.
   event addressFormFilled
     parameters
       # Information about the fields that were filled
       array of FilledField filledFields
       # An UI representation of the address used to fill the form.
       # Consists of a 2D array where each child represents an address/profile line.
       AddressUI addressUi

   # Trigger autofill on a form identified by the fieldId.
   # If the field and related form cannot be autofilled, returns an error.
   command trigger
     parameters
       # Identifies a field that serves as an anchor for autofill.
       DOM.BackendNodeId fieldId
       # Identifies the frame that field belongs to.
       optional Page.FrameId frameId
       # Credit card information to fill out the form. Credit card data is not saved.
       CreditCard card

   # Set addresses so that developers can verify their forms implementation.
   command setAddresses
     # Test addresses for the available countries.
     parameters
       array of Address addresses

   # Disables autofill domain notifications.
   command disable

   # Enables autofill domain notifications.
   command enable

 # Defines events for background web platform features.
 experimental domain BackgroundService
   # The Background Service that will be associated with the commands/events.
   # Every Background Service operates independently, but they share the same
   # API.
   type ServiceName extends string
     enum
       backgroundFetch
       backgroundSync
       pushMessaging
       notifications
       paymentHandler
       periodicBackgroundSync

   # Enables event updates for the service.
   command startObserving
     parameters
       ServiceName service

   # Disables event updates for the service.
   command stopObserving
     parameters
       ServiceName service

   # Set the recording state for the service.
   command setRecording
     parameters
       boolean shouldRecord
       ServiceName service

   # Clears all stored data for the service.
   command clearEvents
     parameters
       ServiceName service

   # Called when the recording state for the service has been updated.
   event recordingStateChanged
     parameters
       boolean isRecording
       ServiceName service

   # A key-value pair for additional event information to pass along.
   type EventMetadata extends object
     properties
       string key
       string value

   type BackgroundServiceEvent extends object
     properties
       # Timestamp of the event (in seconds).
       Network.TimeSinceEpoch timestamp
       # The origin this event belongs to.
       string origin
       # The Service Worker ID that initiated the event.
       ServiceWorker.RegistrationID serviceWorkerRegistrationId
       # The Background Service this event belongs to.
       ServiceName service
       # A description of the event.
       string eventName
       # An identifier that groups related events together.
       string instanceId
       # A list of event-specific information.
       array of EventMetadata eventMetadata
       # Storage key this event belongs to.
       string storageKey

   # Called with all existing backgroundServiceEvents when enabled, and all new
   # events afterwards if enabled and recording.
   event backgroundServiceEventReceived
     parameters
       BackgroundServiceEvent backgroundServiceEvent

 # The Browser domain defines methods and events for browser managing.
 domain Browser
   experimental type BrowserContextID extends string
   experimental type WindowID extends integer

   # The state of the browser window.
   experimental type WindowState extends string
     enum
       normal
       minimized
       maximized
       fullscreen

   # Browser window bounds information
   experimental type Bounds extends object
     properties
       # The offset from the left edge of the screen to the window in pixels.
       optional integer left
       # The offset from the top edge of the screen to the window in pixels.
       optional integer top
       # The window width in pixels.
       optional integer width
       # The window height in pixels.
       optional integer height
       # The window state. Default to normal.
       optional WindowState windowState

   experimental type PermissionType extends string
     enum
       ar
       audioCapture
       automaticFullscreen
       backgroundFetch
       backgroundSync
       cameraPanTiltZoom
       capturedSurfaceControl
       clipboardReadWrite
       clipboardSanitizedWrite
       displayCapture
       durableStorage
       geolocation
       handTracking
       idleDetection
       keyboardLock
       localFonts
       localNetworkAccess
       midi
       midiSysex
       nfc
       notifications
       paymentHandler
       periodicBackgroundSync
       pointerLock
       protectedMediaIdentifier
       sensors
       smartCard
       speakerSelection
       storageAccess
       topLevelStorageAccess
       videoCapture
       vr
       wakeLockScreen
       wakeLockSystem
       webAppInstallation
       webPrinting
       windowManagement

   experimental type PermissionSetting extends string
     enum
       granted
       denied
       prompt

   # Definition of PermissionDescriptor defined in the Permissions API:
   # https://w3c.github.io/permissions/#dom-permissiondescriptor.
   experimental type PermissionDescriptor extends object
     properties
       # Name of permission.
       # See https://cs.chromium.org/chromium/src/third_party/blink/renderer/modules/permissions/permission_descriptor.idl for valid permission names.
       string name
       # For "midi" permission, may also specify sysex control.
       optional boolean sysex
       # For "push" permission, may specify userVisibleOnly.
       # Note that userVisibleOnly = true is the only currently supported type.
       optional boolean userVisibleOnly
       # For "clipboard" permission, may specify allowWithoutSanitization.
       optional boolean allowWithoutSanitization
       # For "fullscreen" permission, must specify allowWithoutGesture:true.
       optional boolean allowWithoutGesture
       # For "camera" permission, may specify panTiltZoom.
       optional boolean panTiltZoom

   # Browser command ids used by executeBrowserCommand.
   experimental type BrowserCommandId extends string
     enum
       openTabSearch
       closeTabSearch
       openGlic

   # Set permission settings for given origin.
   experimental command setPermission
     parameters
       # Descriptor of permission to override.
       PermissionDescriptor permission
       # Setting of the permission.
       PermissionSetting setting
       # Origin the permission applies to, all origins if not specified.
       optional string origin
       # Context to override. When omitted, default browser context is used.
       optional BrowserContextID browserContextId

   # Grant specific permissions to the given origin and reject all others.
   experimental command grantPermissions
     parameters
       array of PermissionType permissions
       # Origin the permission applies to, all origins if not specified.
       optional string origin
       # BrowserContext to override permissions. When omitted, default browser context is used.
       optional BrowserContextID browserContextId

   # Reset all permission management for all origins.
   command resetPermissions
     parameters
       # BrowserContext to reset permissions. When omitted, default browser context is used.
       optional BrowserContextID browserContextId

   # Set the behavior when downloading a file.
   experimental command setDownloadBehavior
     parameters
       # Whether to allow all or deny all download requests, or use default Chrome behavior if
       # available (otherwise deny). |allowAndName| allows download and names files according to
       # their download guids.
       enum behavior
         deny
         allow
         allowAndName
         default
       # BrowserContext to set download behavior. When omitted, default browser context is used.
       optional BrowserContextID browserContextId
       # The default path to save downloaded files to. This is required if behavior is set to 'allow'
       # or 'allowAndName'.
       optional string downloadPath
       # Whether to emit download events (defaults to false).
       optional boolean eventsEnabled

   # Cancel a download if in progress
   experimental command cancelDownload
     parameters
       # Global unique identifier of the download.
       string guid
       # BrowserContext to perform the action in. When omitted, default browser context is used.
       optional BrowserContextID browserContextId

   # Fired when page is about to start a download.
   experimental event downloadWillBegin
     parameters
       # Id of the frame that caused the download to begin.
       Page.FrameId frameId
       # Global unique identifier of the download.
       string guid
       # URL of the resource being downloaded.
       string url
       # Suggested file name of the resource (the actual name of the file saved on disk may differ).
       string suggestedFilename

   # Fired when download makes progress. Last call has |done| == true.
   experimental event downloadProgress
     parameters
       # Global unique identifier of the download.
       string guid
       # Total expected bytes to download.
       number totalBytes
       # Total bytes received.
       number receivedBytes
       # Download status.
       enum state
         inProgress
         completed
         canceled

   # Close browser gracefully.
   command close

   # Crashes browser on the main thread.
   experimental command crash

   # Crashes GPU process.
   experimental command crashGpuProcess

   # Returns version information.
   command getVersion
     returns
       # Protocol version.
       string protocolVersion
       # Product name.
       string product
       # Product revision.
       string revision
       # User-Agent.
       string userAgent
       # V8 version.
       string jsVersion

   # Returns the command line switches for the browser process if, and only if
   # --enable-automation is on the commandline.
   experimental command getBrowserCommandLine
     returns
       # Commandline parameters
       array of string arguments

   # Chrome histogram bucket.
   experimental type Bucket extends object
     properties
       # Minimum value (inclusive).
       integer low
       # Maximum value (exclusive).
       integer high
       # Number of samples.
       integer count

   # Chrome histogram.
   experimental type Histogram extends object
     properties
       # Name.
       string name
       # Sum of sample values.
       integer sum
       # Total number of samples.
       integer count
       # Buckets.
       array of Bucket buckets

   # Get Chrome histograms.
   experimental command getHistograms
     parameters
       # Requested substring in name. Only histograms which have query as a
       # substring in their name are extracted. An empty or absent query returns
       # all histograms.
       optional string query
       # If true, retrieve delta since last delta call.
       optional boolean delta

     returns
       # Histograms.
       array of Histogram histograms

   # Get a Chrome histogram by name.
   experimental command getHistogram
     parameters
       # Requested histogram name.
       string name
       # If true, retrieve delta since last delta call.
       optional boolean delta
     returns
       # Histogram.
       Histogram histogram

   # Get position and size of the browser window.
   experimental command getWindowBounds
     parameters
       # Browser window id.
       WindowID windowId
     returns
       # Bounds information of the window. When window state is 'minimized', the restored window
       # position and size are returned.
       Bounds bounds

   # Get the browser window that contains the devtools target.
   experimental command getWindowForTarget
     parameters
       # Devtools agent host id. If called as a part of the session, associated targetId is used.
       optional Target.TargetID targetId
     returns
       # Browser window id.
       WindowID windowId
       # Bounds information of the window. When window state is 'minimized', the restored window
       # position and size are returned.
       Bounds bounds

   # Set position and/or size of the browser window.
   experimental command setWindowBounds
     parameters
       # Browser window id.
       WindowID windowId
       # New window bounds. The 'minimized', 'maximized' and 'fullscreen' states cannot be combined
       # with 'left', 'top', 'width' or 'height'. Leaves unspecified fields unchanged.
       Bounds bounds

   # Set dock tile details, platform-specific.
   experimental command setDockTile
     parameters
       optional string badgeLabel
       # Png encoded image.
       optional binary image

   # Invoke custom browser commands used by telemetry.
   experimental command executeBrowserCommand
     parameters
       BrowserCommandId commandId

   # Allows a site to use privacy sandbox features that require enrollment
   # without the site actually being enrolled. Only supported on page targets.
   command addPrivacySandboxEnrollmentOverride
     parameters
       string url

   experimental type PrivacySandboxAPI extends string
     enum
       BiddingAndAuctionServices
       TrustedKeyValue

   # Configures encryption keys used with a given privacy sandbox API to talk
   # to a trusted coordinator.  Since this is intended for test automation only,
   # coordinatorOrigin must be a .test domain. No existing coordinator
   # configuration for the origin may exist.
   command addPrivacySandboxCoordinatorKeyConfig
     parameters
       PrivacySandboxAPI api
       string coordinatorOrigin
       string keyConfig
       # BrowserContext to perform the action in. When omitted, default browser
       # context is used.
       optional BrowserContextID browserContextId


 # This domain exposes CSS read/write operations. All CSS objects (stylesheets, rules, and styles)
 # have an associated `id` used in subsequent operations on the related object. Each object type has
 # a specific `id` structure, and those are not interchangeable between objects of different kinds.
 # CSS objects can be loaded using the `get*ForNode()` calls (which accept a DOM node id). A client
 # can also keep track of stylesheets via the `styleSheetAdded`/`styleSheetRemoved` events and
 # subsequently load the required stylesheet contents using the `getStyleSheet[Text]()` methods.
 experimental domain CSS
   depends on DOM
   depends on Page

   type StyleSheetId extends string

   # Stylesheet type: "injected" for stylesheets injected via extension, "user-agent" for user-agent
   # stylesheets, "inspector" for stylesheets created by the inspector (i.e. those holding the "via
   # inspector" rules), "regular" for regular stylesheets.
   type StyleSheetOrigin extends string
     enum
       injected
       user-agent
       inspector
       regular

   # CSS rule collection for a single pseudo style.
   type PseudoElementMatches extends object
     properties
       # Pseudo element type.
       DOM.PseudoType pseudoType
       # Pseudo element custom ident.
       optional string pseudoIdentifier
       # Matches of CSS rules applicable to the pseudo style.
       array of RuleMatch matches

   # CSS style coming from animations with the name of the animation.
   type CSSAnimationStyle extends object
     properties
       # The name of the animation.
       optional string name
       # The style coming from the animation.
       CSSStyle style

   # Inherited CSS rule collection from ancestor node.
   type InheritedStyleEntry extends object
     properties
       # The ancestor node's inline style, if any, in the style inheritance chain.
       optional CSSStyle inlineStyle
       # Matches of CSS rules matching the ancestor node in the style inheritance chain.
       array of RuleMatch matchedCSSRules

   # Inherited CSS style collection for animated styles from ancestor node.
   type InheritedAnimatedStyleEntry extends object
     properties
       # Styles coming from the animations of the ancestor, if any, in the style inheritance chain.
       optional array of CSSAnimationStyle animationStyles
       # The style coming from the transitions of the ancestor, if any, in the style inheritance chain.
       optional CSSStyle transitionsStyle

   # Inherited pseudo element matches from pseudos of an ancestor node.
   type InheritedPseudoElementMatches extends object
     properties
       # Matches of pseudo styles from the pseudos of an ancestor node.
       array of PseudoElementMatches pseudoElements

   # Match data for a CSS rule.
   type RuleMatch extends object
     properties
       # CSS rule in the match.
       CSSRule rule
       # Matching selector indices in the rule's selectorList selectors (0-based).
       array of integer matchingSelectors

   # Data for a simple selector (these are delimited by commas in a selector list).
   type Value extends object
     properties
       # Value text.
       string text
       # Value range in the underlying resource (if available).
       optional SourceRange range
       # Specificity of the selector.
       experimental optional Specificity specificity

   # Specificity:
   # https://drafts.csswg.org/selectors/#specificity-rules
   experimental type Specificity extends object
     properties
       # The a component, which represents the number of ID selectors.
       integer a
       # The b component, which represents the number of class selectors, attributes selectors, and
       # pseudo-classes.
       integer b
       # The c component, which represents the number of type selectors and pseudo-elements.
       integer c

   # Selector list data.
   type SelectorList extends object
     properties
       # Selectors in the list.
       array of Value selectors
       # Rule selector text.
       string text

   # CSS stylesheet metainformation.
   type CSSStyleSheetHeader extends object
     properties
       # The stylesheet identifier.
       StyleSheetId styleSheetId
       # Owner frame identifier.
       Page.FrameId frameId
       # Stylesheet resource URL. Empty if this is a constructed stylesheet created using
       # new CSSStyleSheet() (but non-empty if this is a constructed stylesheet imported
       # as a CSS module script).
       string sourceURL
       # URL of source map associated with the stylesheet (if any).
       optional string sourceMapURL
       # Stylesheet origin.
       StyleSheetOrigin origin
       # Stylesheet title.
       string title
       # The backend id for the owner node of the stylesheet.
       optional DOM.BackendNodeId ownerNode
       # Denotes whether the stylesheet is disabled.
       boolean disabled
       # Whether the sourceURL field value comes from the sourceURL comment.
       optional boolean hasSourceURL
       # Whether this stylesheet is created for STYLE tag by parser. This flag is not set for
       # document.written STYLE tags.
       boolean isInline
       # Whether this stylesheet is mutable. Inline stylesheets become mutable
       # after they have been modified via CSSOM API.
       # `<link>` element's stylesheets become mutable only if DevTools modifies them.
       # Constructed stylesheets (new CSSStyleSheet()) are mutable immediately after creation.
       boolean isMutable
       # True if this stylesheet is created through new CSSStyleSheet() or imported as a
       # CSS module script.
       boolean isConstructed
       # Line offset of the stylesheet within the resource (zero based).
       number startLine
       # Column offset of the stylesheet within the resource (zero based).
       number startColumn
       # Size of the content (in characters).
       number length
       # Line offset of the end of the stylesheet within the resource (zero based).
       number endLine
       # Column offset of the end of the stylesheet within the resource (zero based).
       number endColumn
       # If the style sheet was loaded from a network resource, this indicates when the resource failed to load
       experimental optional boolean loadingFailed

   # CSS rule representation.
   type CSSRule extends object
     properties
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       optional StyleSheetId styleSheetId
       # Rule selector data.
       SelectorList selectorList
       # Array of selectors from ancestor style rules, sorted by distance from the current rule.
       experimental optional array of string nestingSelectors
       # Parent stylesheet's origin.
       StyleSheetOrigin origin
       # Associated style declaration.
       CSSStyle style
       # Media list array (for rules involving media queries). The array enumerates media queries
       # starting with the innermost one, going outwards.
       optional array of CSSMedia media
       # Container query list array (for rules involving container queries).
       # The array enumerates container queries starting with the innermost one, going outwards.
       experimental optional array of CSSContainerQuery containerQueries
       # @supports CSS at-rule array.
       # The array enumerates @supports at-rules starting with the innermost one, going outwards.
       experimental optional array of CSSSupports supports
       # Cascade layer array. Contains the layer hierarchy that this rule belongs to starting
       # with the innermost layer and going outwards.
       experimental optional array of CSSLayer layers
       # @scope CSS at-rule array.
       # The array enumerates @scope at-rules starting with the innermost one, going outwards.
       experimental optional array of CSSScope scopes
       # The array keeps the types of ancestor CSSRules from the innermost going outwards.
       experimental optional array of CSSRuleType ruleTypes
       # @starting-style CSS at-rule array.
       # The array enumerates @starting-style at-rules starting with the innermost one, going outwards.
       experimental optional array of CSSStartingStyle startingStyles

   # Enum indicating the type of a CSS rule, used to represent the order of a style rule's ancestors.
   # This list only contains rule types that are collected during the ancestor rule collection.
   experimental type CSSRuleType extends string
     enum
       MediaRule
       SupportsRule
       ContainerRule
       LayerRule
       ScopeRule
       StyleRule
       StartingStyleRule

   # CSS coverage information.
   type RuleUsage extends object
     properties
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       StyleSheetId styleSheetId
       # Offset of the start of the rule (including selector) from the beginning of the stylesheet.
       number startOffset
       # Offset of the end of the rule body from the beginning of the stylesheet.
       number endOffset
       # Indicates whether the rule was actually used by some element in the page.
       boolean used

   # Text range within a resource. All numbers are zero-based.
   type SourceRange extends object
     properties
       # Start line of range.
       integer startLine
       # Start column of range (inclusive).
       integer startColumn
       # End line of range
       integer endLine
       # End column of range (exclusive).
       integer endColumn

   type ShorthandEntry extends object
     properties
       # Shorthand name.
       string name
       # Shorthand value.
       string value
       # Whether the property has "!important" annotation (implies `false` if absent).
       optional boolean important

   type CSSComputedStyleProperty extends object
     properties
       # Computed style property name.
       string name
       # Computed style property value.
       string value

   # CSS style representation.
   type CSSStyle extends object
     properties
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       optional StyleSheetId styleSheetId
       # CSS properties in the style.
       array of CSSProperty cssProperties
       # Computed values for all shorthands found in the style.
       array of ShorthandEntry shorthandEntries
       # Style declaration text (if available).
       optional string cssText
       # Style declaration range in the enclosing stylesheet (if available).
       optional SourceRange range

   # CSS property declaration data.
   type CSSProperty extends object
     properties
       # The property name.
       string name
       # The property value.
       string value
       # Whether the property has "!important" annotation (implies `false` if absent).
       optional boolean important
       # Whether the property is implicit (implies `false` if absent).
       optional boolean implicit
       # The full property text as specified in the style.
       optional string text
       # Whether the property is understood by the browser (implies `true` if absent).
       optional boolean parsedOk
       # Whether the property is disabled by the user (present for source-based properties only).
       optional boolean disabled
       # The entire property range in the enclosing style declaration (if available).
       optional SourceRange range
       # Parsed longhand components of this property if it is a shorthand.
       # This field will be empty if the given property is not a shorthand.
       experimental optional array of CSSProperty longhandProperties

   # CSS media rule descriptor.
   type CSSMedia extends object
     properties
       # Media query text.
       string text
       # Source of the media query: "mediaRule" if specified by a @media rule, "importRule" if
       # specified by an @import rule, "linkedSheet" if specified by a "media" attribute in a linked
       # stylesheet's LINK tag, "inlineSheet" if specified by a "media" attribute in an inline
       # stylesheet's STYLE tag.
       enum source
         mediaRule
         importRule
         linkedSheet
         inlineSheet
       # URL of the document containing the media query description.
       optional string sourceURL
       # The associated rule (@media or @import) header range in the enclosing stylesheet (if
       # available).
       optional SourceRange range
       # Identifier of the stylesheet containing this object (if exists).
       optional StyleSheetId styleSheetId
       # Array of media queries.
       optional array of MediaQuery mediaList

   # Media query descriptor.
   type MediaQuery extends object
     properties
       # Array of media query expressions.
       array of MediaQueryExpression expressions
       # Whether the media query condition is satisfied.
       boolean active

   # Media query expression descriptor.
   type MediaQueryExpression extends object
     properties
       # Media query expression value.
       number value
       # Media query expression units.
       string unit
       # Media query expression feature.
       string feature
       # The associated range of the value text in the enclosing stylesheet (if available).
       optional SourceRange valueRange
       # Computed length of media query expression (if applicable).
       optional number computedLength

   # CSS container query rule descriptor.
   experimental type CSSContainerQuery extends object
     properties
       # Container query text.
       string text
       # The associated rule header range in the enclosing stylesheet (if
       # available).
       optional SourceRange range
       # Identifier of the stylesheet containing this object (if exists).
       optional StyleSheetId styleSheetId
       # Optional name for the container.
       optional string name
       # Optional physical axes queried for the container.
       optional DOM.PhysicalAxes physicalAxes
       # Optional logical axes queried for the container.
       optional DOM.LogicalAxes logicalAxes
       # true if the query contains scroll-state() queries.
       optional boolean queriesScrollState

   # CSS Supports at-rule descriptor.
   experimental type CSSSupports extends object
     properties
       # Supports rule text.
       string text
       # Whether the supports condition is satisfied.
       boolean active
       # The associated rule header range in the enclosing stylesheet (if
       # available).
       optional SourceRange range
       # Identifier of the stylesheet containing this object (if exists).
       optional StyleSheetId styleSheetId

   # CSS Scope at-rule descriptor.
   experimental type CSSScope extends object
     properties
       # Scope rule text.
       string text
       # The associated rule header range in the enclosing stylesheet (if
       # available).
       optional SourceRange range
       # Identifier of the stylesheet containing this object (if exists).
       optional StyleSheetId styleSheetId

   # CSS Layer at-rule descriptor.
   experimental type CSSLayer extends object
     properties
       # Layer name.
       string text
       # The associated rule header range in the enclosing stylesheet (if
       # available).
       optional SourceRange range
       # Identifier of the stylesheet containing this object (if exists).
       optional StyleSheetId styleSheetId

   # CSS Starting Style at-rule descriptor.
   experimental type CSSStartingStyle extends object
     properties
       # The associated rule header range in the enclosing stylesheet (if
       # available).
       optional SourceRange range
       # Identifier of the stylesheet containing this object (if exists).
       optional StyleSheetId styleSheetId

   # CSS Layer data.
   experimental type CSSLayerData extends object
     properties
       # Layer name.
       string name
       # Direct sub-layers
       optional array of CSSLayerData subLayers
       # Layer order. The order determines the order of the layer in the cascade order.
       # A higher number has higher priority in the cascade order.
       number order

   # Information about amount of glyphs that were rendered with given font.
   type PlatformFontUsage extends object
     properties
       # Font's family name reported by platform.
       string familyName
       # Font's PostScript name reported by platform.
       string postScriptName
       # Indicates if the font was downloaded or resolved locally.
       boolean isCustomFont
       # Amount of glyphs that were rendered with this font.
       number glyphCount

   # Information about font variation axes for variable fonts
   type FontVariationAxis extends object
     properties
       # The font-variation-setting tag (a.k.a. "axis tag").
       string tag
       # Human-readable variation name in the default language (normally, "en").
       string name
       # The minimum value (inclusive) the font supports for this tag.
       number minValue
       # The maximum value (inclusive) the font supports for this tag.
       number maxValue
       # The default value.
       number defaultValue

   # Properties of a web font: https://www.w3.org/TR/2008/REC-CSS2-20080411/fonts.html#font-descriptions
   # and additional information such as platformFontFamily and fontVariationAxes.
   type FontFace extends object
     properties
       # The font-family.
       string fontFamily
       # The font-style.
       string fontStyle
       # The font-variant.
       string fontVariant
       # The font-weight.
       string fontWeight
       # The font-stretch.
       string fontStretch
       # The font-display.
       string fontDisplay
       # The unicode-range.
       string unicodeRange
       # The src.
       string src
       # The resolved platform font family
       string platformFontFamily
       # Available variation settings (a.k.a. "axes").
       optional array of FontVariationAxis fontVariationAxes

   # CSS try rule representation.
   type CSSTryRule extends object
     properties
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       optional StyleSheetId styleSheetId
       # Parent stylesheet's origin.
       StyleSheetOrigin origin
       # Associated style declaration.
       CSSStyle style

   # CSS @position-try rule representation.
   type CSSPositionTryRule extends object
     properties
       # The prelude dashed-ident name
       Value name
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       optional StyleSheetId styleSheetId
       # Parent stylesheet's origin.
       StyleSheetOrigin origin
       # Associated style declaration.
       CSSStyle style
       boolean active

   # CSS keyframes rule representation.
   type CSSKeyframesRule extends object
     properties
       # Animation name.
       Value animationName
       # List of keyframes.
       array of CSSKeyframeRule keyframes

   # Representation of a custom property registration through CSS.registerProperty
   type CSSPropertyRegistration extends object
     properties
       string propertyName
       optional Value initialValue
       boolean inherits
       string syntax


   # CSS font-palette-values rule representation.
   type CSSFontPaletteValuesRule extends object
     properties
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       optional StyleSheetId styleSheetId
       # Parent stylesheet's origin.
       StyleSheetOrigin origin
       # Associated font palette name.
       Value fontPaletteName
       # Associated style declaration.
       CSSStyle style

   # CSS property at-rule representation.
   type CSSPropertyRule extends object
     properties
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       optional StyleSheetId styleSheetId
       # Parent stylesheet's origin.
       StyleSheetOrigin origin
       # Associated property name.
       Value propertyName
       # Associated style declaration.
       CSSStyle style

   # CSS function argument representation.
   type CSSFunctionParameter extends object
     properties
       # The parameter name.
       string name
       # The parameter type.
       string type

   # CSS function conditional block representation.
   type CSSFunctionConditionNode extends object
     properties
       # Media query for this conditional block. Only one type of condition should be set.
       optional CSSMedia media
       # Container query for this conditional block. Only one type of condition should be set.
       optional CSSContainerQuery containerQueries
       # @supports CSS at-rule condition. Only one type of condition should be set.
       optional CSSSupports supports
       # Block body.
       array of CSSFunctionNode children
       # The condition text.
       string conditionText

   # Section of the body of a CSS function rule.
   type CSSFunctionNode extends object
     properties
       # A conditional block. If set, style should not be set.
       optional CSSFunctionConditionNode condition
       # Values set by this node. If set, condition should not be set.
       optional CSSStyle style

   # CSS function at-rule representation.
   type CSSFunctionRule extends object
     properties
       # Name of the function.
       Value name
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       optional StyleSheetId styleSheetId
       # Parent stylesheet's origin.
       StyleSheetOrigin origin
       # List of parameters.
       array of CSSFunctionParameter parameters
       # Function body.
       array of CSSFunctionNode children

   # CSS keyframe rule representation.
   type CSSKeyframeRule extends object
     properties
       # The css style sheet identifier (absent for user agent stylesheet and user-specified
       # stylesheet rules) this rule came from.
       optional StyleSheetId styleSheetId
       # Parent stylesheet's origin.
       StyleSheetOrigin origin
       # Associated key text.
       Value keyText
       # Associated style declaration.
       CSSStyle style

   # A descriptor of operation to mutate style declaration text.
   type StyleDeclarationEdit extends object
     properties
       # The css style sheet identifier.
       StyleSheetId styleSheetId
       # The range of the style text in the enclosing stylesheet.
       SourceRange range
       # New style text.
       string text

   # Inserts a new rule with the given `ruleText` in a stylesheet with given `styleSheetId`, at the
   # position specified by `location`.
   command addRule
     parameters
       # The css style sheet identifier where a new rule should be inserted.
       StyleSheetId styleSheetId
       # The text of a new rule.
       string ruleText
       # Text position of a new rule in the target style sheet.
       SourceRange location
       # NodeId for the DOM node in whose context custom property declarations for registered properties should be
       # validated. If omitted, declarations in the new rule text can only be validated statically, which may produce
       # incorrect results if the declaration contains a var() for example.
       experimental optional DOM.NodeId nodeForPropertySyntaxValidation
     returns
       # The newly created rule.
       CSSRule rule

   # Returns all class names from specified stylesheet.
   command collectClassNames
     parameters
       StyleSheetId styleSheetId
     returns
       # Class name list.
       array of string classNames

   # Creates a new special "via-inspector" stylesheet in the frame with given `frameId`.
   command createStyleSheet
     parameters
       # Identifier of the frame where "via-inspector" stylesheet should be created.
       Page.FrameId frameId
       # If true, creates a new stylesheet for every call. If false,
       # returns a stylesheet previously created by a call with force=false
       # for the frame's document if it exists or creates a new stylesheet
       # (default: false).
       optional boolean force
     returns
       # Identifier of the created "via-inspector" stylesheet.
       StyleSheetId styleSheetId

   # Disables the CSS agent for the given page.
   command disable

   # Enables the CSS agent for the given page. Clients should not assume that the CSS agent has been
   # enabled until the result of this command is received.
   command enable

   # Ensures that the given node will have specified pseudo-classes whenever its style is computed by
   # the browser.
   command forcePseudoState
     parameters
       # The element id for which to force the pseudo state.
       DOM.NodeId nodeId
       # Element pseudo classes to force when computing the element's style.
       array of string forcedPseudoClasses

   # Ensures that the given node is in its starting-style state.
   command forceStartingStyle
     parameters
       # The element id for which to force the starting-style state.
       DOM.NodeId nodeId
       # Boolean indicating if this is on or off.
       boolean forced

   command getBackgroundColors
     parameters
       # Id of the node to get background colors for.
       DOM.NodeId nodeId
     returns
       # The range of background colors behind this element, if it contains any visible text. If no
       # visible text is present, this will be undefined. In the case of a flat background color,
       # this will consist of simply that color. In the case of a gradient, this will consist of each
       # of the color stops. For anything more complicated, this will be an empty array. Images will
       # be ignored (as if the image had failed to load).
       optional array of string backgroundColors
       # The computed font size for this node, as a CSS computed value string (e.g. '12px').
       optional string computedFontSize
       # The computed font weight for this node, as a CSS computed value string (e.g. 'normal' or
       # '100').
       optional string computedFontWeight

   # Returns the computed style for a DOM node identified by `nodeId`.
   command getComputedStyleForNode
     parameters
       DOM.NodeId nodeId
     returns
       # Computed style for the specified DOM node.
       array of CSSComputedStyleProperty computedStyle

   # Resolve the specified values in the context of the provided element.
   # For example, a value of '1em' is evaluated according to the computed
   # 'font-size' of the element and a value 'calc(1px + 2px)' will be
   # resolved to '3px'.
   # If the `propertyName` was specified the `values` are resolved as if
   # they were property's declaration. If a value cannot be parsed according
   # to the provided property syntax, the value is parsed using combined
   # syntax as if null `propertyName` was provided. If the value cannot be
   # resolved even then, return the provided value without any changes.
   experimental command resolveValues
     parameters
       # Substitution functions (var()/env()/attr()) and cascade-dependent
       # keywords (revert/revert-layer) do not work.
       array of string values
       # Id of the node in whose context the expression is evaluated
       DOM.NodeId nodeId
       # Only longhands and custom property names are accepted.
       optional string propertyName
       # Pseudo element type, only works for pseudo elements that generate
       # elements in the tree, such as ::before and ::after.
       optional DOM.PseudoType pseudoType
       # Pseudo element custom ident.
       optional string pseudoIdentifier
     returns
       array of string results

   experimental command getLonghandProperties
     parameters
       string shorthandName
       string value
     returns
       array of CSSProperty longhandProperties

   # Returns the styles defined inline (explicitly in the "style" attribute and implicitly, using DOM
   # attributes) for a DOM node identified by `nodeId`.
   command getInlineStylesForNode
     parameters
       DOM.NodeId nodeId
     returns
       # Inline style for the specified DOM node.
       optional CSSStyle inlineStyle
       # Attribute-defined element style (e.g. resulting from "width=20 height=100%").
       optional CSSStyle attributesStyle

   # Returns the styles coming from animations & transitions
   # including the animation & transition styles coming from inheritance chain.
   experimental command getAnimatedStylesForNode
     parameters
       DOM.NodeId nodeId
     returns
       # Styles coming from animations.
       optional array of CSSAnimationStyle animationStyles
       # Style coming from transitions.
       optional CSSStyle transitionsStyle
       # Inherited style entries for animationsStyle and transitionsStyle from
       # the inheritance chain of the element.
       optional array of InheritedAnimatedStyleEntry inherited

   # Returns requested styles for a DOM node identified by `nodeId`.
   command getMatchedStylesForNode
     parameters
       DOM.NodeId nodeId
     returns
       # Inline style for the specified DOM node.
       optional CSSStyle inlineStyle
       # Attribute-defined element style (e.g. resulting from "width=20 height=100%").
       optional CSSStyle attributesStyle
       # CSS rules matching this node, from all applicable stylesheets.
       optional array of RuleMatch matchedCSSRules
       # Pseudo style matches for this node.
       optional array of PseudoElementMatches pseudoElements
       # A chain of inherited styles (from the immediate node parent up to the DOM tree root).
       optional array of InheritedStyleEntry inherited
       # A chain of inherited pseudo element styles (from the immediate node parent up to the DOM tree root).
       optional array of InheritedPseudoElementMatches inheritedPseudoElements
       # A list of CSS keyframed animations matching this node.
       optional array of CSSKeyframesRule cssKeyframesRules
       # A list of CSS @position-try rules matching this node, based on the position-try-fallbacks property.
       optional array of CSSPositionTryRule cssPositionTryRules
       # Index of the active fallback in the applied position-try-fallback property,
       # will not be set if there is no active position-try fallback.
       optional integer activePositionFallbackIndex
       # A list of CSS at-property rules matching this node.
       optional array of CSSPropertyRule cssPropertyRules
       # A list of CSS property registrations matching this node.
       optional array of CSSPropertyRegistration cssPropertyRegistrations
       # A font-palette-values rule matching this node.
       optional CSSFontPaletteValuesRule cssFontPaletteValuesRule
       # Id of the first parent element that does not have display: contents.
       experimental optional DOM.NodeId parentLayoutNodeId
       # A list of CSS at-function rules referenced by styles of this node.
       experimental optional array of CSSFunctionRule cssFunctionRules

   # Returns all media queries parsed by the rendering engine.
   command getMediaQueries
     returns
       array of CSSMedia medias

   # Requests information about platform fonts which we used to render child TextNodes in the given
   # node.
   command getPlatformFontsForNode
     parameters
       DOM.NodeId nodeId
     returns
       # Usage statistics for every employed platform font.
       array of PlatformFontUsage fonts

   # Returns the current textual content for a stylesheet.
   command getStyleSheetText
     parameters
       StyleSheetId styleSheetId
     returns
       # The stylesheet text.
       string text

   # Returns all layers parsed by the rendering engine for the tree scope of a node.
   # Given a DOM element identified by nodeId, getLayersForNode returns the root
   # layer for the nearest ancestor document or shadow root. The layer root contains
   # the full layer tree for the tree scope and their ordering.
   experimental command getLayersForNode
     parameters
       DOM.NodeId nodeId
     returns
       CSSLayerData rootLayer

   # Given a CSS selector text and a style sheet ID, getLocationForSelector
   # returns an array of locations of the CSS selector in the style sheet.
   experimental command getLocationForSelector
     parameters
       StyleSheetId styleSheetId
       string selectorText
     returns
       array of SourceRange ranges

   # Starts tracking the given node for the computed style updates
   # and whenever the computed style is updated for node, it queues
   # a `computedStyleUpdated` event with throttling.
   # There can only be 1 node tracked for computed style updates
   # so passing a new node id removes tracking from the previous node.
   # Pass `undefined` to disable tracking.
   experimental command trackComputedStyleUpdatesForNode
     parameters
       optional DOM.NodeId nodeId

   # Starts tracking the given computed styles for updates. The specified array of properties
   # replaces the one previously specified. Pass empty array to disable tracking.
   # Use takeComputedStyleUpdates to retrieve the list of nodes that had properties modified.
   # The changes to computed style properties are only tracked for nodes pushed to the front-end
   # by the DOM agent. If no changes to the tracked properties occur after the node has been pushed
   # to the front-end, no updates will be issued for the node.
   experimental command trackComputedStyleUpdates
     parameters
       array of CSSComputedStyleProperty propertiesToTrack

   # Polls the next batch of computed style updates.
   experimental command takeComputedStyleUpdates
     returns
       # The list of node Ids that have their tracked computed styles updated.
       array of DOM.NodeId nodeIds

   # Find a rule with the given active property for the given node and set the new value for this
   # property
   command setEffectivePropertyValueForNode
     parameters
       # The element id for which to set property.
       DOM.NodeId nodeId
       string propertyName
       string value

   # Modifies the property rule property name.
   command setPropertyRulePropertyName
     parameters
       StyleSheetId styleSheetId
       SourceRange range
       string propertyName
     returns
       # The resulting key text after modification.
       Value propertyName

   # Modifies the keyframe rule key text.
   command setKeyframeKey
     parameters
       StyleSheetId styleSheetId
       SourceRange range
       string keyText
     returns
       # The resulting key text after modification.
       Value keyText

   # Modifies the rule selector.
   command setMediaText
     parameters
       StyleSheetId styleSheetId
       SourceRange range
       string text
     returns
       # The resulting CSS media rule after modification.
       CSSMedia media

   # Modifies the expression of a container query.
   experimental command setContainerQueryText
     parameters
       StyleSheetId styleSheetId
       SourceRange range
       string text
     returns
       # The resulting CSS container query rule after modification.
       CSSContainerQuery containerQuery

   # Modifies the expression of a supports at-rule.
   experimental command setSupportsText
     parameters
       StyleSheetId styleSheetId
       SourceRange range
       string text
     returns
       # The resulting CSS Supports rule after modification.
       CSSSupports supports

   # Modifies the expression of a scope at-rule.
   experimental command setScopeText
     parameters
       StyleSheetId styleSheetId
       SourceRange range
       string text
     returns
       # The resulting CSS Scope rule after modification.
       CSSScope scope

   # Modifies the rule selector.
   command setRuleSelector
     parameters
       StyleSheetId styleSheetId
       SourceRange range
       string selector
     returns
       # The resulting selector list after modification.
       SelectorList selectorList

   # Sets the new stylesheet text.
   command setStyleSheetText
     parameters
       StyleSheetId styleSheetId
       string text
     returns
       # URL of source map associated with script (if any).
       optional string sourceMapURL

   # Applies specified style edits one after another in the given order.
   command setStyleTexts
     parameters
       array of StyleDeclarationEdit edits
       # NodeId for the DOM node in whose context custom property declarations for registered properties should be
       # validated. If omitted, declarations in the new rule text can only be validated statically, which may produce
       # incorrect results if the declaration contains a var() for example.
       experimental optional DOM.NodeId nodeForPropertySyntaxValidation
     returns
       # The resulting styles after modification.
       array of CSSStyle styles

   # Enables the selector recording.
   command startRuleUsageTracking

   # Stop tracking rule usage and return the list of rules that were used since last call to
   # `takeCoverageDelta` (or since start of coverage instrumentation).
   command stopRuleUsageTracking
     returns
       array of RuleUsage ruleUsage

   # Obtain list of rules that became used since last call to this method (or since start of coverage
   # instrumentation).
   command takeCoverageDelta
     returns
       array of RuleUsage coverage
       # Monotonically increasing time, in seconds.
       number timestamp

   # Enables/disables rendering of local CSS fonts (enabled by default).
   experimental command setLocalFontsEnabled
     parameters
       # Whether rendering of local fonts is enabled.
       boolean enabled

   # Fires whenever a web font is updated.  A non-empty font parameter indicates a successfully loaded
   # web font.
   event fontsUpdated
     parameters
       # The web font that has loaded.
       optional FontFace font

   # Fires whenever a MediaQuery result changes (for example, after a browser window has been
   # resized.) The current implementation considers only viewport-dependent media features.
   event mediaQueryResultChanged

   # Fired whenever an active document stylesheet is added.
   event styleSheetAdded
     parameters
       # Added stylesheet metainfo.
       CSSStyleSheetHeader header

   # Fired whenever a stylesheet is changed as a result of the client operation.
   event styleSheetChanged
     parameters
       StyleSheetId styleSheetId

   # Fired whenever an active document stylesheet is removed.
   event styleSheetRemoved
     parameters
       # Identifier of the removed stylesheet.
       StyleSheetId styleSheetId

   experimental event computedStyleUpdated
     parameters
       # The node id that has updated computed styles.
       DOM.NodeId nodeId

 experimental domain CacheStorage
   depends on Storage

   # Unique identifier of the Cache object.
   type CacheId extends string

   # type of HTTP response cached
   type CachedResponseType extends string
     enum
       basic
       cors
       default
       error
       opaqueResponse
       opaqueRedirect

   # Data entry.
   type DataEntry extends object
     properties
       # Request URL.
       string requestURL
       # Request method.
       string requestMethod
       # Request headers
       array of Header requestHeaders
       # Number of seconds since epoch.
       number responseTime
       # HTTP response status code.
       integer responseStatus
       # HTTP response status text.
       string responseStatusText
       # HTTP response type
       CachedResponseType responseType
       # Response headers
       array of Header responseHeaders

   # Cache identifier.
   type Cache extends object
     properties
       # An opaque unique id of the cache.
       CacheId cacheId
       # Security origin of the cache.
       string securityOrigin
       # Storage key of the cache.
       string storageKey
       # Storage bucket of the cache.
       optional Storage.StorageBucket storageBucket
       # The name of the cache.
       string cacheName

   type Header extends object
     properties
       string name
       string value

   # Cached response
   type CachedResponse extends object
     properties
       # Entry content, base64-encoded.
       binary body

   # Deletes a cache.
   command deleteCache
     parameters
       # Id of cache for deletion.
       CacheId cacheId

   # Deletes a cache entry.
   command deleteEntry
     parameters
       # Id of cache where the entry will be deleted.
       CacheId cacheId
       # URL spec of the request.
       string request

   # Requests cache names.
   command requestCacheNames
     parameters
       # At least and at most one of securityOrigin, storageKey, storageBucket must be specified.
       # Security origin.
       optional string securityOrigin
       # Storage key.
       optional string storageKey
       # Storage bucket. If not specified, it uses the default bucket.
       optional Storage.StorageBucket storageBucket
     returns
       # Caches for the security origin.
       array of Cache caches

   # Fetches cache entry.
   command requestCachedResponse
     parameters
       # Id of cache that contains the entry.
       CacheId cacheId
       # URL spec of the request.
       string requestURL
       # headers of the request.
       array of Header requestHeaders
     returns
       # Response read from the cache.
       CachedResponse response

   # Requests data from cache.
   command requestEntries
     parameters
       # ID of cache to get entries from.
       CacheId cacheId
       # Number of records to skip.
       optional integer skipCount
       # Number of records to fetch.
       optional integer pageSize
       # If present, only return the entries containing this substring in the path
       optional string pathFilter
     returns
       # Array of object store data entries.
       array of DataEntry cacheDataEntries
       # Count of returned entries from this storage. If pathFilter is empty, it
       # is the count of all entries from this storage.
       number returnCount

 # A domain for interacting with Cast, Presentation API, and Remote Playback API
 # functionalities.
 experimental domain Cast

   type Sink extends object
     properties
       string name
       string id
       # Text describing the current session. Present only if there is an active
       # session on the sink.
       optional string session

   # Starts observing for sinks that can be used for tab mirroring, and if set,
   # sinks compatible with |presentationUrl| as well. When sinks are found, a
   # |sinksUpdated| event is fired.
   # Also starts observing for issue messages. When an issue is added or removed,
   # an |issueUpdated| event is fired.
   command enable
     parameters
       optional string presentationUrl

   # Stops observing for sinks and issues.
   command disable

   # Sets a sink to be used when the web page requests the browser to choose a
   # sink via Presentation API, Remote Playback API, or Cast SDK.
   command setSinkToUse
     parameters
       string sinkName

   # Starts mirroring the desktop to the sink.
   command startDesktopMirroring
     parameters
       string sinkName

   # Starts mirroring the tab to the sink.
   command startTabMirroring
     parameters
       string sinkName

   # Stops the active Cast session on the sink.
   command stopCasting
     parameters
       string sinkName

   # This is fired whenever the list of available sinks changes. A sink is a
   # device or a software surface that you can cast to.
   event sinksUpdated
     parameters
       array of Sink sinks

   # This is fired whenever the outstanding issue/error message changes.
   # |issueMessage| is empty if there is no issue.
   event issueUpdated
     parameters
       string issueMessage


 # This domain exposes DOM read/write operations. Each DOM Node is represented with its mirror object
 # that has an `id`. This `id` can be used to get additional information on the Node, resolve it into
 # the JavaScript object wrapper, etc. It is important that client receives DOM events only for the
 # nodes that are known to the client. Backend keeps track of the nodes that were sent to the client
 # and never sends the same node twice. It is client's responsibility to collect information about
 # the nodes that were sent to the client. Note that `iframe` owner elements will return
 # corresponding document elements as their child nodes.
 domain DOM
   depends on Runtime

   # Unique DOM node identifier.
   type NodeId extends integer

   # Unique DOM node identifier used to reference a node that may not have been pushed to the
   # front-end.
   type BackendNodeId extends integer

   # Backend node with a friendly name.
   type BackendNode extends object
     properties
       # `Node`'s nodeType.
       integer nodeType
       # `Node`'s nodeName.
       string nodeName
       BackendNodeId backendNodeId

   # Pseudo element type.
   type PseudoType extends string
     enum
       first-line
       first-letter
       checkmark
       before
       after
       picker-icon
       marker
       backdrop
       column
       selection
       search-text
       target-text
       spelling-error
       grammar-error
       highlight
       first-line-inherited
       scroll-marker
       scroll-marker-group
       scroll-button
       scrollbar
       scrollbar-thumb
       scrollbar-button
       scrollbar-track
       scrollbar-track-piece
       scrollbar-corner
       resizer
       input-list-button
       view-transition
       view-transition-group
       view-transition-image-pair
       view-transition-old
       view-transition-new
       placeholder
       file-selector-button
       details-content
       picker

   # Shadow root type.
   type ShadowRootType extends string
     enum
       user-agent
       open
       closed

   # Document compatibility mode.
   type CompatibilityMode extends string
     enum
       QuirksMode
       LimitedQuirksMode
       NoQuirksMode

   # ContainerSelector physical axes
   type PhysicalAxes extends string
     enum
       Horizontal
       Vertical
       Both

   # ContainerSelector logical axes
   type LogicalAxes extends string
     enum
       Inline
       Block
       Both

   # Physical scroll orientation
   type ScrollOrientation extends string
     enum
       horizontal
       vertical

   # DOM interaction is implemented in terms of mirror objects that represent the actual DOM nodes.
   # DOMNode is a base node mirror type.
   type Node extends object
     properties
       # Node identifier that is passed into the rest of the DOM messages as the `nodeId`. Backend
       # will only push node with given `id` once. It is aware of all requested nodes and will only
       # fire DOM events for nodes known to the client.
       NodeId nodeId
       # The id of the parent node if any.
       optional NodeId parentId
       # The BackendNodeId for this node.
       BackendNodeId backendNodeId
       # `Node`'s nodeType.
       integer nodeType
       # `Node`'s nodeName.
       string nodeName
       # `Node`'s localName.
       string localName
       # `Node`'s nodeValue.
       string nodeValue
       # Child count for `Container` nodes.
       optional integer childNodeCount
       # Child nodes of this node when requested with children.
       optional array of Node children
       # Attributes of the `Element` node in the form of flat array `[name1, value1, name2, value2]`.
       optional array of string attributes
       # Document URL that `Document` or `FrameOwner` node points to.
       optional string documentURL
       # Base URL that `Document` or `FrameOwner` node uses for URL completion.
       optional string baseURL
       # `DocumentType`'s publicId.
       optional string publicId
       # `DocumentType`'s systemId.
       optional string systemId
       # `DocumentType`'s internalSubset.
       optional string internalSubset
       # `Document`'s XML version in case of XML documents.
       optional string xmlVersion
       # `Attr`'s name.
       optional string name
       # `Attr`'s value.
       optional string value
       # Pseudo element type for this node.
       optional PseudoType pseudoType
       # Pseudo element identifier for this node. Only present if there is a
       # valid pseudoType.
       optional string pseudoIdentifier
       # Shadow root type.
       optional ShadowRootType shadowRootType
       # Frame ID for frame owner elements.
       optional Page.FrameId frameId
       # Content document for frame owner elements.
       optional Node contentDocument
       # Shadow root list for given element host.
       optional array of Node shadowRoots
       # Content document fragment for template elements.
       optional Node templateContent
       # Pseudo elements associated with this node.
       optional array of Node pseudoElements
       # Deprecated, as the HTML Imports API has been removed (crbug.com/937746).
       # This property used to return the imported document for the HTMLImport links.
       # The property is always undefined now.
       deprecated optional Node importedDocument
       # Distributed nodes for given insertion point.
       optional array of BackendNode distributedNodes
       # Whether the node is SVG.
       optional boolean isSVG
       optional CompatibilityMode compatibilityMode
       optional BackendNode assignedSlot
       experimental optional boolean isScrollable

   # A structure to hold the top-level node of a detached tree and an array of its retained descendants.
   type DetachedElementInfo extends object
     properties
       Node treeNode
       array of NodeId retainedNodeIds

   # A structure holding an RGBA color.
   type RGBA extends object
     properties
       # The red component, in the [0-255] range.
       integer r
       # The green component, in the [0-255] range.
       integer g
       # The blue component, in the [0-255] range.
       integer b
       # The alpha component, in the [0-1] range (default: 1).
       optional number a

   # An array of quad vertices, x immediately followed by y for each point, points clock-wise.
   type Quad extends array of number

   # Box model.
   type BoxModel extends object
     properties
       # Content box
       Quad content
       # Padding box
       Quad padding
       # Border box
       Quad border
       # Margin box
       Quad margin
       # Node width
       integer width
       # Node height
       integer height
       # Shape outside coordinates
       optional ShapeOutsideInfo shapeOutside

   # CSS Shape Outside details.
   type ShapeOutsideInfo extends object
     properties
       # Shape bounds
       Quad bounds
       # Shape coordinate details
       array of any shape
       # Margin shape bounds
       array of any marginShape

   # Rectangle.
   type Rect extends object
     properties
       # X coordinate
       number x
       # Y coordinate
       number y
       # Rectangle width
       number width
       # Rectangle height
       number height

   type CSSComputedStyleProperty extends object
     properties
       # Computed style property name.
       string name
       # Computed style property value.
       string value

   # Collects class names for the node with given id and all of it's child nodes.
   experimental command collectClassNamesFromSubtree
     parameters
       # Id of the node to collect class names.
       NodeId nodeId
     returns
       # Class name list.
       array of string classNames

   # Creates a deep copy of the specified node and places it into the target container before the
   # given anchor.
   experimental command copyTo
     parameters
       # Id of the node to copy.
       NodeId nodeId
       # Id of the element to drop the copy into.
       NodeId targetNodeId
       # Drop the copy before this node (if absent, the copy becomes the last child of
       # `targetNodeId`).
       optional NodeId insertBeforeNodeId
     returns
       # Id of the node clone.
       NodeId nodeId

   # Describes node given its id, does not require domain to be enabled. Does not start tracking any
   # objects, can be used for automation.
   command describeNode
     parameters
       # Identifier of the node.
       optional NodeId nodeId
       # Identifier of the backend node.
       optional BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper.
       optional Runtime.RemoteObjectId objectId
       # The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the
       # entire subtree or provide an integer larger than 0.
       optional integer depth
       # Whether or not iframes and shadow roots should be traversed when returning the subtree
       # (default is false).
       optional boolean pierce
     returns
       # Node description.
       Node node

   # Scrolls the specified rect of the given node into view if not already visible.
   # Note: exactly one between nodeId, backendNodeId and objectId should be passed
   # to identify the node.
   command scrollIntoViewIfNeeded
     parameters
       # Identifier of the node.
       optional NodeId nodeId
       # Identifier of the backend node.
       optional BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper.
       optional Runtime.RemoteObjectId objectId
       # The rect to be scrolled into view, relative to the node's border box, in CSS pixels.
       # When omitted, center of the node will be used, similar to Element.scrollIntoView.
       optional Rect rect

   # Disables DOM agent for the given page.
   command disable

   # Discards search results from the session with the given id. `getSearchResults` should no longer
   # be called for that search.
   experimental command discardSearchResults
     parameters
       # Unique search session identifier.
       string searchId

   # Enables DOM agent for the given page.
   command enable
     parameters
       # Whether to include whitespaces in the children array of returned Nodes.
       experimental optional enum includeWhitespace
         # Strip whitespaces from child arrays (default).
         none
         # Return all children including block-level whitespace nodes.
         all

   # Focuses the given element.
   command focus
     parameters
       # Identifier of the node.
       optional NodeId nodeId
       # Identifier of the backend node.
       optional BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper.
       optional Runtime.RemoteObjectId objectId

   # Returns attributes for the specified node.
   command getAttributes
     parameters
       # Id of the node to retrieve attributes for.
       NodeId nodeId
     returns
       # An interleaved array of node attribute names and values.
       array of string attributes

   # Returns boxes for the given node.
   command getBoxModel
     parameters
       # Identifier of the node.
       optional NodeId nodeId
       # Identifier of the backend node.
       optional BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper.
       optional Runtime.RemoteObjectId objectId
     returns
       # Box model for the node.
       BoxModel model

   # Returns quads that describe node position on the page. This method
   # might return multiple quads for inline nodes.
   experimental command getContentQuads
     parameters
       # Identifier of the node.
       optional NodeId nodeId
       # Identifier of the backend node.
       optional BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper.
       optional Runtime.RemoteObjectId objectId
     returns
       # Quads that describe node layout relative to viewport.
       array of Quad quads

   # Returns the root DOM node (and optionally the subtree) to the caller.
   # Implicitly enables the DOM domain events for the current target.
   command getDocument
     parameters
       # The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the
       # entire subtree or provide an integer larger than 0.
       optional integer depth
       # Whether or not iframes and shadow roots should be traversed when returning the subtree
       # (default is false).
       optional boolean pierce
     returns
       # Resulting node.
       Node root

   # Returns the root DOM node (and optionally the subtree) to the caller.
   # Deprecated, as it is not designed to work well with the rest of the DOM agent.
   # Use DOMSnapshot.captureSnapshot instead.
   deprecated command getFlattenedDocument
     parameters
       # The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the
       # entire subtree or provide an integer larger than 0.
       optional integer depth
       # Whether or not iframes and shadow roots should be traversed when returning the subtree
       # (default is false).
       optional boolean pierce
     returns
       # Resulting node.
       array of Node nodes

   # Finds nodes with a given computed style in a subtree.
   experimental command getNodesForSubtreeByStyle
     parameters
       # Node ID pointing to the root of a subtree.
       NodeId nodeId
       # The style to filter nodes by (includes nodes if any of properties matches).
       array of CSSComputedStyleProperty computedStyles
       # Whether or not iframes and shadow roots in the same target should be traversed when returning the
       # results (default is false).
       optional boolean pierce
     returns
       # Resulting nodes.
       array of NodeId nodeIds

   # Returns node id at given location. Depending on whether DOM domain is enabled, nodeId is
   # either returned or not.
   command getNodeForLocation
     parameters
       # X coordinate.
       integer x
       # Y coordinate.
       integer y
       # False to skip to the nearest non-UA shadow root ancestor (default: false).
       optional boolean includeUserAgentShadowDOM
       # Whether to ignore pointer-events: none on elements and hit test them.
       optional boolean ignorePointerEventsNone
     returns
       # Resulting node.
       BackendNodeId backendNodeId
       # Frame this node belongs to.
       Page.FrameId frameId
       # Id of the node at given coordinates, only when enabled and requested document.
       optional NodeId nodeId

   # Returns node's HTML markup.
   command getOuterHTML
     parameters
       # Identifier of the node.
       optional NodeId nodeId
       # Identifier of the backend node.
       optional BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper.
       optional Runtime.RemoteObjectId objectId
     returns
       # Outer HTML markup.
       string outerHTML

   # Returns the id of the nearest ancestor that is a relayout boundary.
   experimental command getRelayoutBoundary
     parameters
       # Id of the node.
       NodeId nodeId
     returns
       # Relayout boundary node id for the given node.
       NodeId nodeId

   # Returns search results from given `fromIndex` to given `toIndex` from the search with the given
   # identifier.
   experimental command getSearchResults
     parameters
       # Unique search session identifier.
       string searchId
       # Start index of the search result to be returned.
       integer fromIndex
       # End index of the search result to be returned.
       integer toIndex
     returns
       # Ids of the search result nodes.
       array of NodeId nodeIds

   # Hides any highlight.
   command hideHighlight
     # Use 'Overlay.hideHighlight' instead
     redirect Overlay

   # Highlights DOM node.
   command highlightNode
     # Use 'Overlay.highlightNode' instead
     redirect Overlay

   # Highlights given rectangle.
   command highlightRect
     # Use 'Overlay.highlightRect' instead
     redirect Overlay

   # Marks last undoable state.
   experimental command markUndoableState

   # Moves node into the new container, places it before the given anchor.
   command moveTo
     parameters
       # Id of the node to move.
       NodeId nodeId
       # Id of the element to drop the moved node into.
       NodeId targetNodeId
       # Drop node before this one (if absent, the moved node becomes the last child of
       # `targetNodeId`).
       optional NodeId insertBeforeNodeId
     returns
       # New id of the moved node.
       NodeId nodeId

   # Searches for a given string in the DOM tree. Use `getSearchResults` to access search results or
   # `cancelSearch` to end this search session.
   experimental command performSearch
     parameters
       # Plain text or query selector or XPath search query.
       string query
       # True to search in user agent shadow DOM.
       optional boolean includeUserAgentShadowDOM
     returns
       # Unique search session identifier.
       string searchId
       # Number of search results.
       integer resultCount

   # Requests that the node is sent to the caller given its path. // FIXME, use XPath
   experimental command pushNodeByPathToFrontend
     parameters
       # Path to node in the proprietary format.
       string path
     returns
       # Id of the node for given path.
       NodeId nodeId

   # Requests that a batch of nodes is sent to the caller given their backend node ids.
   experimental command pushNodesByBackendIdsToFrontend
     parameters
       # The array of backend node ids.
       array of BackendNodeId backendNodeIds
     returns
       # The array of ids of pushed nodes that correspond to the backend ids specified in
       # backendNodeIds.
       array of NodeId nodeIds

   # Executes `querySelector` on a given node.
   command querySelector
     parameters
       # Id of the node to query upon.
       NodeId nodeId
       # Selector string.
       string selector
     returns
       # Query selector result.
       NodeId nodeId

   # Executes `querySelectorAll` on a given node.
   command querySelectorAll
     parameters
       # Id of the node to query upon.
       NodeId nodeId
       # Selector string.
       string selector
     returns
       # Query selector result.
       array of NodeId nodeIds

   # Returns NodeIds of current top layer elements.
   # Top layer is rendered closest to the user within a viewport, therefore its elements always
   # appear on top of all other content.
   experimental command getTopLayerElements
     returns
       # NodeIds of top layer elements
       array of NodeId nodeIds

   # Returns the NodeId of the matched element according to certain relations.
   experimental command getElementByRelation
     parameters
       # Id of the node from which to query the relation.
       NodeId nodeId
       # Type of relation to get.
       enum relation
         # Get the popover target for a given element. In this case, this given
         # element can only be an HTMLFormControlElement (<input>, <button>).
         PopoverTarget
         # Get the interest target for a given element.
         InterestTarget
     returns
       # NodeId of the element matching the queried relation.
       NodeId nodeId

   # Re-does the last undone action.
   experimental command redo

   # Removes attribute with given name from an element with given id.
   command removeAttribute
     parameters
       # Id of the element to remove attribute from.
       NodeId nodeId
       # Name of the attribute to remove.
       string name

   # Removes node with given id.
   command removeNode
     parameters
       # Id of the node to remove.
       NodeId nodeId

   # Requests that children of the node with given id are returned to the caller in form of
   # `setChildNodes` events where not only immediate children are retrieved, but all children down to
   # the specified depth.
   command requestChildNodes
     parameters
       # Id of the node to get children for.
       NodeId nodeId
       # The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the
       # entire subtree or provide an integer larger than 0.
       optional integer depth
       # Whether or not iframes and shadow roots should be traversed when returning the sub-tree
       # (default is false).
       optional boolean pierce

   # Requests that the node is sent to the caller given the JavaScript node object reference. All
   # nodes that form the path from the node to the root are also sent to the client as a series of
   # `setChildNodes` notifications.
   command requestNode
     parameters
       # JavaScript object id to convert into node.
       Runtime.RemoteObjectId objectId
     returns
       # Node id for given object.
       NodeId nodeId

   # Resolves the JavaScript node object for a given NodeId or BackendNodeId.
   command resolveNode
     parameters
       # Id of the node to resolve.
       optional NodeId nodeId
       # Backend identifier of the node to resolve.
       optional DOM.BackendNodeId backendNodeId
       # Symbolic group name that can be used to release multiple objects.
       optional string objectGroup
       # Execution context in which to resolve the node.
       optional Runtime.ExecutionContextId executionContextId
     returns
       # JavaScript object wrapper for given node.
       Runtime.RemoteObject object

   # Sets attribute for an element with given id.
   command setAttributeValue
     parameters
       # Id of the element to set attribute for.
       NodeId nodeId
       # Attribute name.
       string name
       # Attribute value.
       string value

   # Sets attributes on element with given id. This method is useful when user edits some existing
   # attribute value and types in several attribute name/value pairs.
   command setAttributesAsText
     parameters
       # Id of the element to set attributes for.
       NodeId nodeId
       # Text with a number of attributes. Will parse this text using HTML parser.
       string text
       # Attribute name to replace with new attributes derived from text in case text parsed
       # successfully.
       optional string name

   # Sets files for the given file input element.
   command setFileInputFiles
     parameters
       # Array of file paths to set.
       array of string files
       # Identifier of the node.
       optional NodeId nodeId
       # Identifier of the backend node.
       optional BackendNodeId backendNodeId
       # JavaScript object id of the node wrapper.
       optional Runtime.RemoteObjectId objectId

   # Sets if stack traces should be captured for Nodes. See `Node.getNodeStackTraces`. Default is disabled.
   experimental command setNodeStackTracesEnabled
     parameters
       # Enable or disable.
       boolean enable

   # Gets stack traces associated with a Node. As of now, only provides stack trace for Node creation.
   experimental command getNodeStackTraces
     parameters
       # Id of the node to get stack traces for.
       NodeId nodeId
     returns
       # Creation stack trace, if available.
       optional Runtime.StackTrace creation

   # Returns file information for the given
   # File wrapper.
   experimental command getFileInfo
     parameters
       # JavaScript object id of the node wrapper.
       Runtime.RemoteObjectId objectId
     returns
       string path

   # Returns list of detached nodes
   experimental command getDetachedDomNodes
     returns
       # The list of detached nodes
       array of DetachedElementInfo detachedNodes

   # Enables console to refer to the node with given id via $x (see Command Line API for more details
   # $x functions).
   experimental command setInspectedNode
     parameters
       # DOM node id to be accessible by means of $x command line API.
       NodeId nodeId

   # Sets node name for a node with given id.
   command setNodeName
     parameters
       # Id of the node to set name for.
       NodeId nodeId
       # New node's name.
       string name
     returns
       # New node's id.
       NodeId nodeId

   # Sets node value for a node with given id.
   command setNodeValue
     parameters
       # Id of the node to set value for.
       NodeId nodeId
       # New node's value.
       string value

   # Sets node HTML markup, returns new node id.
   command setOuterHTML
     parameters
       # Id of the node to set markup for.
       NodeId nodeId
       # Outer HTML markup to set.
       string outerHTML

   # Undoes the last performed action.
   experimental command undo

   # Returns iframe node that owns iframe with the given domain.
   experimental command getFrameOwner
     parameters
       Page.FrameId frameId
     returns
       # Resulting node.
       BackendNodeId backendNodeId
       # Id of the node at given coordinates, only when enabled and requested document.
       optional NodeId nodeId

   # Returns the query container of the given node based on container query
   # conditions: containerName, physical and logical axes, and whether it queries
   # scroll-state. If no axes are provided and queriesScrollState is false, the
   # style container is returned, which is the direct parent or the closest
   # element with a matching container-name.
   experimental command getContainerForNode
     parameters
       NodeId nodeId
       optional string containerName
       optional PhysicalAxes physicalAxes
       optional LogicalAxes logicalAxes
       optional boolean queriesScrollState
     returns
       # The container node for the given node, or null if not found.
       optional NodeId nodeId

   # Returns the descendants of a container query container that have
   # container queries against this container.
   experimental command getQueryingDescendantsForContainer
     parameters
       # Id of the container node to find querying descendants from.
       NodeId nodeId
     returns
       # Descendant nodes with container queries against the given container.
       array of NodeId nodeIds

   # Returns the target anchor element of the given anchor query according to
   # https://www.w3.org/TR/css-anchor-position-1/#target.
   experimental command getAnchorElement
     parameters
       # Id of the positioned element from which to find the anchor.
       NodeId nodeId
       # An optional anchor specifier, as defined in
       # https://www.w3.org/TR/css-anchor-position-1/#anchor-specifier.
       # If not provided, it will return the implicit anchor element for
       # the given positioned element.
       optional string anchorSpecifier
     returns
       # The anchor element of the given anchor query.
       NodeId nodeId

   # Fired when `Element`'s attribute is modified.
   event attributeModified
     parameters
       # Id of the node that has changed.
       NodeId nodeId
       # Attribute name.
       string name
       # Attribute value.
       string value

   # Fired when `Element`'s attribute is removed.
   event attributeRemoved
     parameters
       # Id of the node that has changed.
       NodeId nodeId
       # A ttribute name.
       string name

   # Mirrors `DOMCharacterDataModified` event.
   event characterDataModified
     parameters
       # Id of the node that has changed.
       NodeId nodeId
       # New text value.
       string characterData

   # Fired when `Container`'s child node count has changed.
   event childNodeCountUpdated
     parameters
       # Id of the node that has changed.
       NodeId nodeId
       # New node count.
       integer childNodeCount

   # Mirrors `DOMNodeInserted` event.
   event childNodeInserted
     parameters
       # Id of the node that has changed.
       NodeId parentNodeId
       # Id of the previous sibling.
       NodeId previousNodeId
       # Inserted node data.
       Node node

   # Mirrors `DOMNodeRemoved` event.
   event childNodeRemoved
     parameters
       # Parent id.
       NodeId parentNodeId
       # Id of the node that has been removed.
       NodeId nodeId

   # Called when distribution is changed.
   experimental event distributedNodesUpdated
     parameters
       # Insertion point where distributed nodes were updated.
       NodeId insertionPointId
       # Distributed nodes for given insertion point.
       array of BackendNode distributedNodes

   # Fired when `Document` has been totally updated. Node ids are no longer valid.
   event documentUpdated

   # Fired when `Element`'s inline style is modified via a CSS property modification.
   experimental event inlineStyleInvalidated
     parameters
       # Ids of the nodes for which the inline styles have been invalidated.
       array of NodeId nodeIds

   # Called when a pseudo element is added to an element.
   experimental event pseudoElementAdded
     parameters
       # Pseudo element's parent element id.
       NodeId parentId
       # The added pseudo element.
       Node pseudoElement

   # Called when top layer elements are changed.
   experimental event topLayerElementsUpdated

   # Fired when a node's scrollability state changes.
   experimental event scrollableFlagUpdated
     parameters
       # The id of the node.
       DOM.NodeId nodeId
       # If the node is scrollable.
       boolean isScrollable

   # Called when a pseudo element is removed from an element.
   experimental event pseudoElementRemoved
     parameters
       # Pseudo element's parent element id.
       NodeId parentId
       # The removed pseudo element id.
       NodeId pseudoElementId

   # Fired when backend wants to provide client with the missing DOM structure. This happens upon
   # most of the calls requesting node ids.
   event setChildNodes
     parameters
       # Parent node id to populate with children.
       NodeId parentId
       # Child nodes array.
       array of Node nodes

   # Called when shadow root is popped from the element.
   experimental event shadowRootPopped
     parameters
       # Host element id.
       NodeId hostId
       # Shadow root id.
       NodeId rootId

   # Called when shadow root is pushed into the element.
   experimental event shadowRootPushed
     parameters
       # Host element id.
       NodeId hostId
       # Shadow root.
       Node root

 # DOM debugging allows setting breakpoints on particular DOM operations and events. JavaScript
 # execution will stop on these operations as if there was a regular breakpoint set.
 domain DOMDebugger
   depends on DOM
   depends on Runtime

   # DOM breakpoint type.
   type DOMBreakpointType extends string
     enum
       subtree-modified
       attribute-modified
       node-removed

   # CSP Violation type.
   experimental type CSPViolationType extends string
     enum
       trustedtype-sink-violation
       trustedtype-policy-violation

   # Object event listener.
   type EventListener extends object
     properties
       # `EventListener`'s type.
       string type
       # `EventListener`'s useCapture.
       boolean useCapture
       # `EventListener`'s passive flag.
       boolean passive
       # `EventListener`'s once flag.
       boolean once
       # Script id of the handler code.
       Runtime.ScriptId scriptId
       # Line number in the script (0-based).
       integer lineNumber
       # Column number in the script (0-based).
       integer columnNumber
       # Event handler function value.
       optional Runtime.RemoteObject handler
       # Event original handler function value.
       optional Runtime.RemoteObject originalHandler
       # Node the listener is added to (if any).
       optional DOM.BackendNodeId backendNodeId

   # Returns event listeners of the given object.
   command getEventListeners
     parameters
       # Identifier of the object to return listeners for.
       Runtime.RemoteObjectId objectId
       # The maximum depth at which Node children should be retrieved, defaults to 1. Use -1 for the
       # entire subtree or provide an integer larger than 0.
       optional integer depth
       # Whether or not iframes and shadow roots should be traversed when returning the subtree
       # (default is false). Reports listeners for all contexts if pierce is enabled.
       optional boolean pierce
     returns
       # Array of relevant listeners.
       array of EventListener listeners

   # Removes DOM breakpoint that was set using `setDOMBreakpoint`.
   command removeDOMBreakpoint
     parameters
       # Identifier of the node to remove breakpoint from.
       DOM.NodeId nodeId
       # Type of the breakpoint to remove.
       DOMBreakpointType type

   # Removes breakpoint on particular DOM event.
   command removeEventListenerBreakpoint
     parameters
       # Event name.
       string eventName
       # EventTarget interface name.
       experimental optional string targetName

   # Removes breakpoint on particular native event.
   experimental deprecated command removeInstrumentationBreakpoint
     redirect EventBreakpoints
     parameters
       # Instrumentation name to stop on.
       string eventName

   # Removes breakpoint from XMLHttpRequest.
   command removeXHRBreakpoint
     parameters
       # Resource URL substring.
       string url

   # Sets breakpoint on particular CSP violations.
   experimental command setBreakOnCSPViolation
     parameters
       # CSP Violations to stop upon.
       array of CSPViolationType violationTypes

   # Sets breakpoint on particular operation with DOM.
   command setDOMBreakpoint
     parameters
       # Identifier of the node to set breakpoint on.
       DOM.NodeId nodeId
       # Type of the operation to stop upon.
       DOMBreakpointType type

   # Sets breakpoint on particular DOM event.
   command setEventListenerBreakpoint
     parameters
       # DOM Event name to stop on (any DOM event will do).
       string eventName
       # EventTarget interface name to stop on. If equal to `"*"` or not provided, will stop on any
       # EventTarget.
       experimental optional string targetName

   # Sets breakpoint on particular native event.
   experimental deprecated command setInstrumentationBreakpoint
     redirect EventBreakpoints
     parameters
       # Instrumentation name to stop on.
       string eventName

   # Sets breakpoint on XMLHttpRequest.
   command setXHRBreakpoint
     parameters
       # Resource URL substring. All XHRs having this substring in the URL will get stopped upon.
       string url

 # EventBreakpoints permits setting JavaScript breakpoints on operations and events
 # occurring in native code invoked from JavaScript. Once breakpoint is hit, it is
 # reported through Debugger domain, similarly to regular breakpoints being hit.
 experimental domain EventBreakpoints
   # Sets breakpoint on particular native event.
   command setInstrumentationBreakpoint
     parameters
       # Instrumentation name to stop on.
       string eventName

   # Removes breakpoint on particular native event.
   command removeInstrumentationBreakpoint
     parameters
       # Instrumentation name to stop on.
       string eventName

   # Removes all breakpoints
   command disable

 # This domain facilitates obtaining document snapshots with DOM, layout, and style information.
 experimental domain DOMSnapshot
   depends on CSS
   depends on DOM
   depends on DOMDebugger
   depends on Page

   # A Node in the DOM tree.
   type DOMNode extends object
     properties
       # `Node`'s nodeType.
       integer nodeType
       # `Node`'s nodeName.
       string nodeName
       # `Node`'s nodeValue.
       string nodeValue
       # Only set for textarea elements, contains the text value.
       optional string textValue
       # Only set for input elements, contains the input's associated text value.
       optional string inputValue
       # Only set for radio and checkbox input elements, indicates if the element has been checked
       optional boolean inputChecked
       # Only set for option elements, indicates if the element has been selected
       optional boolean optionSelected
       # `Node`'s id, corresponds to DOM.Node.backendNodeId.
       DOM.BackendNodeId backendNodeId
       # The indexes of the node's child nodes in the `domNodes` array returned by `getSnapshot`, if
       # any.
       optional array of integer childNodeIndexes
       # Attributes of an `Element` node.
       optional array of NameValue attributes
       # Indexes of pseudo elements associated with this node in the `domNodes` array returned by
       # `getSnapshot`, if any.
       optional array of integer pseudoElementIndexes
       # The index of the node's related layout tree node in the `layoutTreeNodes` array returned by
       # `getSnapshot`, if any.
       optional integer layoutNodeIndex
       # Document URL that `Document` or `FrameOwner` node points to.
       optional string documentURL
       # Base URL that `Document` or `FrameOwner` node uses for URL completion.
       optional string baseURL
       # Only set for documents, contains the document's content language.
       optional string contentLanguage
       # Only set for documents, contains the document's character set encoding.
       optional string documentEncoding
       # `DocumentType` node's publicId.
       optional string publicId
       # `DocumentType` node's systemId.
       optional string systemId
       # Frame ID for frame owner elements and also for the document node.
       optional Page.FrameId frameId
       # The index of a frame owner element's content document in the `domNodes` array returned by
       # `getSnapshot`, if any.
       optional integer contentDocumentIndex
       # Type of a pseudo element node.
       optional DOM.PseudoType pseudoType
       # Shadow root type.
       optional DOM.ShadowRootType shadowRootType
       # Whether this DOM node responds to mouse clicks. This includes nodes that have had click
       # event listeners attached via JavaScript as well as anchor tags that naturally navigate when
       # clicked.
       optional boolean isClickable
       # Details of the node's event listeners, if any.
       optional array of DOMDebugger.EventListener eventListeners
       # The selected url for nodes with a srcset attribute.
       optional string currentSourceURL
       # The url of the script (if any) that generates this node.
       optional string originURL
       # Scroll offsets, set when this node is a Document.
       optional number scrollOffsetX
       optional number scrollOffsetY

   # Details of post layout rendered text positions. The exact layout should not be regarded as
   # stable and may change between versions.
   type InlineTextBox extends object
     properties
       # The bounding box in document coordinates. Note that scroll offset of the document is ignored.
       DOM.Rect boundingBox
       # The starting index in characters, for this post layout textbox substring. Characters that
       # would be represented as a surrogate pair in UTF-16 have length 2.
       integer startCharacterIndex
       # The number of characters in this post layout textbox substring. Characters that would be
       # represented as a surrogate pair in UTF-16 have length 2.
       integer numCharacters

   # Details of an element in the DOM tree with a LayoutObject.
   type LayoutTreeNode extends object
     properties
       # The index of the related DOM node in the `domNodes` array returned by `getSnapshot`.
       integer domNodeIndex
       # The bounding box in document coordinates. Note that scroll offset of the document is ignored.
       DOM.Rect boundingBox
       # Contents of the LayoutText, if any.
       optional string layoutText
       # The post-layout inline text nodes, if any.
       optional array of InlineTextBox inlineTextNodes
       # Index into the `computedStyles` array returned by `getSnapshot`.
       optional integer styleIndex
       # Global paint order index, which is determined by the stacking order of the nodes. Nodes
       # that are painted together will have the same index. Only provided if includePaintOrder in
       # getSnapshot was true.
       optional integer paintOrder
       # Set to true to indicate the element begins a new stacking context.
       optional boolean isStackingContext

   # A subset of the full ComputedStyle as defined by the request whitelist.
   type ComputedStyle extends object
     properties
       # Name/value pairs of computed style properties.
       array of NameValue properties

   # A name/value pair.
   type NameValue extends object
     properties
       # Attribute/property name.
       string name
       # Attribute/property value.
       string value

   # Index of the string in the strings table.
   type StringIndex extends integer

   # Index of the string in the strings table.
   type ArrayOfStrings extends array of StringIndex

   # Data that is only present on rare nodes.
   type RareStringData extends object
     properties
       array of integer index
       array of StringIndex value

   type RareBooleanData extends object
     properties
       array of integer index

   type RareIntegerData extends object
     properties
       array of integer index
       array of integer value

   type Rectangle extends array of number

   # Document snapshot.
   type DocumentSnapshot extends object
     properties
       # Document URL that `Document` or `FrameOwner` node points to.
       StringIndex documentURL
       # Document title.
       StringIndex title
       # Base URL that `Document` or `FrameOwner` node uses for URL completion.
       StringIndex baseURL
       # Contains the document's content language.
       StringIndex contentLanguage
       # Contains the document's character set encoding.
       StringIndex encodingName
       # `DocumentType` node's publicId.
       StringIndex publicId
       # `DocumentType` node's systemId.
       StringIndex systemId
       # Frame ID for frame owner elements and also for the document node.
       StringIndex frameId
       # A table with dom nodes.
       NodeTreeSnapshot nodes
       # The nodes in the layout tree.
       LayoutTreeSnapshot layout
       # The post-layout inline text nodes.
       TextBoxSnapshot textBoxes
       # Horizontal scroll offset.
       optional number scrollOffsetX
       # Vertical scroll offset.
       optional number scrollOffsetY
       # Document content width.
       optional number contentWidth
       # Document content height.
       optional number contentHeight

   # Table containing nodes.
   type NodeTreeSnapshot extends object
     properties
       # Parent node index.
       optional array of integer parentIndex
       # `Node`'s nodeType.
       optional array of integer nodeType
       # Type of the shadow root the `Node` is in. String values are equal to the `ShadowRootType` enum.
       optional RareStringData shadowRootType
       # `Node`'s nodeName.
       optional array of StringIndex nodeName
       # `Node`'s nodeValue.
       optional array of StringIndex nodeValue
       # `Node`'s id, corresponds to DOM.Node.backendNodeId.
       optional array of DOM.BackendNodeId backendNodeId
       # Attributes of an `Element` node. Flatten name, value pairs.
       optional array of ArrayOfStrings attributes
       # Only set for textarea elements, contains the text value.
       optional RareStringData textValue
       # Only set for input elements, contains the input's associated text value.
       optional RareStringData inputValue
       # Only set for radio and checkbox input elements, indicates if the element has been checked
       optional RareBooleanData inputChecked
       # Only set for option elements, indicates if the element has been selected
       optional RareBooleanData optionSelected
       # The index of the document in the list of the snapshot documents.
       optional RareIntegerData contentDocumentIndex
       # Type of a pseudo element node.
       optional RareStringData pseudoType
       # Pseudo element identifier for this node. Only present if there is a
       # valid pseudoType.
       optional RareStringData pseudoIdentifier
       # Whether this DOM node responds to mouse clicks. This includes nodes that have had click
       # event listeners attached via JavaScript as well as anchor tags that naturally navigate when
       # clicked.
       optional RareBooleanData isClickable
       # The selected url for nodes with a srcset attribute.
       optional RareStringData currentSourceURL
       # The url of the script (if any) that generates this node.
       optional RareStringData originURL

   # Table of details of an element in the DOM tree with a LayoutObject.
   type LayoutTreeSnapshot extends object
     properties
       # Index of the corresponding node in the `NodeTreeSnapshot` array returned by `captureSnapshot`.
       array of integer nodeIndex
       # Array of indexes specifying computed style strings, filtered according to the `computedStyles` parameter passed to `captureSnapshot`.
       array of ArrayOfStrings styles
       # The absolute position bounding box.
       array of Rectangle bounds
       # Contents of the LayoutText, if any.
       array of StringIndex text
       # Stacking context information.
       RareBooleanData stackingContexts
       # Global paint order index, which is determined by the stacking order of the nodes. Nodes
       # that are painted together will have the same index. Only provided if includePaintOrder in
       # captureSnapshot was true.
       optional array of integer paintOrders
       # The offset rect of nodes. Only available when includeDOMRects is set to true
       optional array of Rectangle offsetRects
       # The scroll rect of nodes. Only available when includeDOMRects is set to true
       optional array of Rectangle scrollRects
       # The client rect of nodes. Only available when includeDOMRects is set to true
       optional array of Rectangle clientRects
       # The list of background colors that are blended with colors of overlapping elements.
       experimental optional array of StringIndex blendedBackgroundColors
       # The list of computed text opacities.
       experimental optional array of number textColorOpacities

   # Table of details of the post layout rendered text positions. The exact layout should not be regarded as
   # stable and may change between versions.
   type TextBoxSnapshot extends object
     properties
       # Index of the layout tree node that owns this box collection.
       array of integer layoutIndex
       # The absolute position bounding box.
       array of Rectangle bounds
       # The starting index in characters, for this post layout textbox substring. Characters that
       # would be represented as a surrogate pair in UTF-16 have length 2.
       array of integer start
       # The number of characters in this post layout textbox substring. Characters that would be
       # represented as a surrogate pair in UTF-16 have length 2.
       array of integer length

   # Disables DOM snapshot agent for the given page.
   command disable

   # Enables DOM snapshot agent for the given page.
   command enable

   # Returns a document snapshot, including the full DOM tree of the root node (including iframes,
   # template contents, and imported documents) in a flattened array, as well as layout and
   # white-listed computed style information for the nodes. Shadow DOM in the returned DOM tree is
   # flattened.
   deprecated command getSnapshot
     parameters
       # Whitelist of computed styles to return.
       array of string computedStyleWhitelist
       # Whether or not to retrieve details of DOM listeners (default false).
       optional boolean includeEventListeners
       # Whether to determine and include the paint order index of LayoutTreeNodes (default false).
       optional boolean includePaintOrder
       # Whether to include UA shadow tree in the snapshot (default false).
       optional boolean includeUserAgentShadowTree
     returns
       # The nodes in the DOM tree. The DOMNode at index 0 corresponds to the root document.
       array of DOMNode domNodes
       # The nodes in the layout tree.
       array of LayoutTreeNode layoutTreeNodes
       # Whitelisted ComputedStyle properties for each node in the layout tree.
       array of ComputedStyle computedStyles

   # Returns a document snapshot, including the full DOM tree of the root node (including iframes,
   # template contents, and imported documents) in a flattened array, as well as layout and
   # white-listed computed style information for the nodes. Shadow DOM in the returned DOM tree is
   # flattened.
   command captureSnapshot
     parameters
       # Whitelist of computed styles to return.
       array of string computedStyles
       # Whether to include layout object paint orders into the snapshot.
       optional boolean includePaintOrder
       # Whether to include DOM rectangles (offsetRects, clientRects, scrollRects) into the snapshot
       optional boolean includeDOMRects
       # Whether to include blended background colors in the snapshot (default: false).
       # Blended background color is achieved by blending background colors of all elements
       # that overlap with the current element.
       experimental optional boolean includeBlendedBackgroundColors
       # Whether to include text color opacity in the snapshot (default: false).
       # An element might have the opacity property set that affects the text color of the element.
       # The final text color opacity is computed based on the opacity of all overlapping elements.
       experimental optional boolean includeTextColorOpacities
     returns
       # The nodes in the DOM tree. The DOMNode at index 0 corresponds to the root document.
       array of DocumentSnapshot documents
       # Shared string table that all string properties refer to with indexes.
       array of string strings

 # Query and modify DOM storage.
 experimental domain DOMStorage

   type SerializedStorageKey extends string

   # DOM Storage identifier.
   type StorageId extends object
     properties
       # Security origin for the storage.
       optional string securityOrigin
       # Represents a key by which DOM Storage keys its CachedStorageAreas
       optional SerializedStorageKey storageKey
       # Whether the storage is local storage (not session storage).
       boolean isLocalStorage

   # DOM Storage item.
   type Item extends array of string

   command clear
     parameters
       StorageId storageId

   # Disables storage tracking, prevents storage events from being sent to the client.
   command disable

   # Enables storage tracking, storage events will now be delivered to the client.
   command enable

   command getDOMStorageItems
     parameters
       StorageId storageId
     returns
       array of Item entries

   command removeDOMStorageItem
     parameters
       StorageId storageId
       string key

   command setDOMStorageItem
     parameters
       StorageId storageId
       string key
       string value

   event domStorageItemAdded
     parameters
       StorageId storageId
       string key
       string newValue

   event domStorageItemRemoved
     parameters
       StorageId storageId
       string key

   event domStorageItemUpdated
     parameters
       StorageId storageId
       string key
       string oldValue
       string newValue

   event domStorageItemsCleared
     parameters
       StorageId storageId

 experimental domain DeviceOrientation

   # Clears the overridden Device Orientation.
   command clearDeviceOrientationOverride

   # Overrides the Device Orientation.
   command setDeviceOrientationOverride
     parameters
       # Mock alpha
       number alpha
       # Mock beta
       number beta
       # Mock gamma
       number gamma

 # This domain emulates different environments for the page.
 domain Emulation
   depends on DOM
   depends on Page
   depends on Runtime

   experimental type SafeAreaInsets extends object
     properties
       # Overrides safe-area-inset-top.
       optional integer top
       # Overrides safe-area-max-inset-top.
       optional integer topMax
       # Overrides safe-area-inset-left.
       optional integer left
       # Overrides safe-area-max-inset-left.
       optional integer leftMax
       # Overrides safe-area-inset-bottom.
       optional integer bottom
       # Overrides safe-area-max-inset-bottom.
       optional integer bottomMax
       # Overrides safe-area-inset-right.
       optional integer right
       # Overrides safe-area-max-inset-right.
       optional integer rightMax

   # Screen orientation.
   type ScreenOrientation extends object
     properties
       # Orientation type.
       enum type
         portraitPrimary
         portraitSecondary
         landscapePrimary
         landscapeSecondary
       # Orientation angle.
       integer angle

   type DisplayFeature extends object
     properties
       # Orientation of a display feature in relation to screen
       enum orientation
         vertical
         horizontal
       # The offset from the screen origin in either the x (for vertical
       # orientation) or y (for horizontal orientation) direction.
       integer offset
       # A display feature may mask content such that it is not physically
       # displayed - this length along with the offset describes this area.
       # A display feature that only splits content will have a 0 mask_length.
       integer maskLength

   type DevicePosture extends object
     properties
       # Current posture of the device
       enum type
         continuous
         folded

   type MediaFeature extends object
     properties
       string name
       string value

   # advance: If the scheduler runs out of immediate work, the virtual time base may fast forward to
   # allow the next delayed task (if any) to run; pause: The virtual time base may not advance;
   # pauseIfNetworkFetchesPending: The virtual time base may not advance if there are any pending
   # resource fetches.
   experimental type VirtualTimePolicy extends string
     enum
       advance
       pause
       pauseIfNetworkFetchesPending

   # Used to specify User Agent Client Hints to emulate. See https://wicg.github.io/ua-client-hints
   experimental type UserAgentBrandVersion extends object
     properties
       string brand
       string version

   # Used to specify User Agent Client Hints to emulate. See https://wicg.github.io/ua-client-hints
   # Missing optional values will be filled in by the target with what it would normally use.
   experimental type UserAgentMetadata extends object
     properties
       # Brands appearing in Sec-CH-UA.
       optional array of UserAgentBrandVersion brands
       # Brands appearing in Sec-CH-UA-Full-Version-List.
       optional array of UserAgentBrandVersion fullVersionList
       deprecated optional string fullVersion
       string platform
       string platformVersion
       string architecture
       string model
       boolean mobile
       optional string bitness
       optional boolean wow64

   # Used to specify sensor types to emulate.
   # See https://w3c.github.io/sensors/#automation for more information.
   experimental type SensorType extends string
     enum
       absolute-orientation
       accelerometer
       ambient-light
       gravity
       gyroscope
       linear-acceleration
       magnetometer
       relative-orientation

   experimental type SensorMetadata extends object
     properties
       optional boolean available
       optional number minimumFrequency
       optional number maximumFrequency

   experimental type SensorReadingSingle extends object
     properties
       number value

   experimental type SensorReadingXYZ extends object
     properties
       number x
       number y
       number z

   experimental type SensorReadingQuaternion extends object
     properties
       number x
       number y
       number z
       number w

   experimental type SensorReading extends object
     properties
       optional SensorReadingSingle single
       optional SensorReadingXYZ xyz
       optional SensorReadingQuaternion quaternion

   experimental type PressureSource extends string
     enum
       cpu

   experimental type PressureState extends string
     enum
       nominal
       fair
       serious
       critical

   experimental type PressureMetadata extends object
     properties
       optional boolean available

   # Tells whether emulation is supported.
   deprecated command canEmulate
     returns
       # True if emulation is supported.
       boolean result

   # Clears the overridden device metrics.
   command clearDeviceMetricsOverride

   # Clears the overridden Geolocation Position and Error.
   command clearGeolocationOverride

   # Requests that page scale factor is reset to initial values.
   experimental command resetPageScaleFactor

   # Enables or disables simulating a focused and active page.
   experimental command setFocusEmulationEnabled
     parameters
       # Whether to enable to disable focus emulation.
       boolean enabled

   # Automatically render all web contents using a dark theme.
   experimental command setAutoDarkModeOverride
     parameters
       # Whether to enable or disable automatic dark mode.
       # If not specified, any existing override will be cleared.
       optional boolean enabled

   # Enables CPU throttling to emulate slow CPUs.
   command setCPUThrottlingRate
     parameters
       # Throttling rate as a slowdown factor (1 is no throttle, 2 is 2x slowdown, etc).
       number rate

   # Sets or clears an override of the default background color of the frame. This override is used
   # if the content does not specify one.
   command setDefaultBackgroundColorOverride
     parameters
       # RGBA of the default background color. If not specified, any existing override will be
       # cleared.
       optional DOM.RGBA color

   # Overrides the values for env(safe-area-inset-*) and env(safe-area-max-inset-*). Unset values will cause the
   # respective variables to be undefined, even if previously overridden.
   experimental command setSafeAreaInsetsOverride
     parameters
       SafeAreaInsets insets

   # Overrides the values of device screen dimensions (window.screen.width, window.screen.height,
   # window.innerWidth, window.innerHeight, and "device-width"/"device-height"-related CSS media
   # query results).
   command setDeviceMetricsOverride
     parameters
       # Overriding width value in pixels (minimum 0, maximum 10000000). 0 disables the override.
       integer width
       # Overriding height value in pixels (minimum 0, maximum 10000000). 0 disables the override.
       integer height
       # Overriding device scale factor value. 0 disables the override.
       number deviceScaleFactor
       # Whether to emulate mobile device. This includes viewport meta tag, overlay scrollbars, text
       # autosizing and more.
       boolean mobile
       # Scale to apply to resulting view image.
       experimental optional number scale
       # Overriding screen width value in pixels (minimum 0, maximum 10000000).
       experimental optional integer screenWidth
       # Overriding screen height value in pixels (minimum 0, maximum 10000000).
       experimental optional integer screenHeight
       # Overriding view X position on screen in pixels (minimum 0, maximum 10000000).
       experimental optional integer positionX
       # Overriding view Y position on screen in pixels (minimum 0, maximum 10000000).
       experimental optional integer positionY
       # Do not set visible view size, rely upon explicit setVisibleSize call.
       experimental optional boolean dontSetVisibleSize
       # Screen orientation override.
       optional ScreenOrientation screenOrientation
       # If set, the visible area of the page will be overridden to this viewport. This viewport
       # change is not observed by the page, e.g. viewport-relative elements do not change positions.
       experimental optional Page.Viewport viewport
       # If set, the display feature of a multi-segment screen. If not set, multi-segment support
       # is turned-off.
       # Deprecated, use Emulation.setDisplayFeaturesOverride.
       experimental deprecated optional DisplayFeature displayFeature
       # If set, the posture of a foldable device. If not set the posture is set
       # to continuous.
       # Deprecated, use Emulation.setDevicePostureOverride.
       experimental deprecated optional DevicePosture devicePosture

   # Start reporting the given posture value to the Device Posture API.
   # This override can also be set in setDeviceMetricsOverride().
   experimental command setDevicePostureOverride
     parameters
       DevicePosture posture

   # Clears a device posture override set with either setDeviceMetricsOverride()
   # or setDevicePostureOverride() and starts using posture information from the
   # platform again.
   # Does nothing if no override is set.
   experimental command clearDevicePostureOverride

   # Start using the given display features to pupulate the Viewport Segments API.
   # This override can also be set in setDeviceMetricsOverride().
   experimental command setDisplayFeaturesOverride
     parameters
       array of DisplayFeature features

   # Clears the display features override set with either setDeviceMetricsOverride()
   # or setDisplayFeaturesOverride() and starts using display features from the
   # platform again.
   # Does nothing if no override is set.
   experimental command clearDisplayFeaturesOverride

   experimental command setScrollbarsHidden
     parameters
       # Whether scrollbars should be always hidden.
       boolean hidden

   experimental command setDocumentCookieDisabled
     parameters
       # Whether document.coookie API should be disabled.
       boolean disabled

   experimental command setEmitTouchEventsForMouse
     parameters
       # Whether touch emulation based on mouse input should be enabled.
       boolean enabled
       # Touch/gesture events configuration. Default: current platform.
       optional enum configuration
         mobile
         desktop

   # Emulates the given media type or media feature for CSS media queries.
   command setEmulatedMedia
     parameters
       # Media type to emulate. Empty string disables the override.
       optional string media
       # Media features to emulate.
       optional array of MediaFeature features

   # Emulates the given vision deficiency.
   command setEmulatedVisionDeficiency
     parameters
       # Vision deficiency to emulate. Order: best-effort emulations come first, followed by any
       # physiologically accurate emulations for medically recognized color vision deficiencies.
       enum type
         none
         blurredVision
         reducedContrast
         achromatopsia
         deuteranopia
         protanopia
         tritanopia

   # Overrides the Geolocation Position or Error. Omitting latitude, longitude or
   # accuracy emulates position unavailable.
   command setGeolocationOverride
     parameters
       # Mock latitude
       optional number latitude
       # Mock longitude
       optional number longitude
       # Mock accuracy
       optional number accuracy
       # Mock altitude
       optional number altitude
       # Mock altitudeAccuracy
       optional number altitudeAccuracy
       # Mock heading
       optional number heading
       # Mock speed
       optional number speed

   experimental command getOverriddenSensorInformation
     parameters
       SensorType type
     returns
       number requestedSamplingFrequency

   # Overrides a platform sensor of a given type. If |enabled| is true, calls to
   # Sensor.start() will use a virtual sensor as backend rather than fetching
   # data from a real hardware sensor. Otherwise, existing virtual
   # sensor-backend Sensor objects will fire an error event and new calls to
   # Sensor.start() will attempt to use a real sensor instead.
   experimental command setSensorOverrideEnabled
     parameters
       boolean enabled
       SensorType type
       optional SensorMetadata metadata

   # Updates the sensor readings reported by a sensor type previously overridden
   # by setSensorOverrideEnabled.
   experimental command setSensorOverrideReadings
     parameters
       SensorType type
       SensorReading reading

   # Overrides a pressure source of a given type, as used by the Compute
   # Pressure API, so that updates to PressureObserver.observe() are provided
   # via setPressureStateOverride instead of being retrieved from
   # platform-provided telemetry data.
   experimental command setPressureSourceOverrideEnabled
     parameters
       boolean enabled
       PressureSource source
       optional PressureMetadata metadata

   # TODO: OBSOLETE: To remove when setPressureDataOverride is merged.
   # Provides a given pressure state that will be processed and eventually be
   # delivered to PressureObserver users. |source| must have been previously
   # overridden by setPressureSourceOverrideEnabled.
   experimental command setPressureStateOverride
     parameters
       PressureSource source
       PressureState state

   # Provides a given pressure data set that will be processed and eventually be
   # delivered to PressureObserver users. |source| must have been previously
   # overridden by setPressureSourceOverrideEnabled.
   experimental command setPressureDataOverride
     parameters
       PressureSource source
       PressureState state
       optional number ownContributionEstimate

   # Overrides the Idle state.
   command setIdleOverride
     parameters
       # Mock isUserActive
       boolean isUserActive
       # Mock isScreenUnlocked
       boolean isScreenUnlocked

   # Clears Idle state overrides.
   command clearIdleOverride

   # Overrides value returned by the javascript navigator object.
   experimental deprecated command setNavigatorOverrides
     parameters
       # The platform navigator.platform should return.
       string platform

   # Sets a specified page scale factor.
   experimental command setPageScaleFactor
     parameters
       # Page scale factor.
       number pageScaleFactor

   # Switches script execution in the page.
   command setScriptExecutionDisabled
     parameters
       # Whether script execution should be disabled in the page.
       boolean value

   # Enables touch on platforms which do not support them.
   command setTouchEmulationEnabled
     parameters
       # Whether the touch event emulation should be enabled.
       boolean enabled
       # Maximum touch points supported. Defaults to one.
       optional integer maxTouchPoints

   # Turns on virtual time for all frames (replacing real-time with a synthetic time source) and sets
   # the current virtual time policy.  Note this supersedes any previous time budget.
   experimental command setVirtualTimePolicy
     parameters
       VirtualTimePolicy policy
       # If set, after this many virtual milliseconds have elapsed virtual time will be paused and a
       # virtualTimeBudgetExpired event is sent.
       optional number budget
       # If set this specifies the maximum number of tasks that can be run before virtual is forced
       # forwards to prevent deadlock.
       optional integer maxVirtualTimeTaskStarvationCount
       # If set, base::Time::Now will be overridden to initially return this value.
       optional Network.TimeSinceEpoch initialVirtualTime
     returns
       # Absolute timestamp at which virtual time was first enabled (up time in milliseconds).
       number virtualTimeTicksBase

   # Overrides default host system locale with the specified one.
   experimental command setLocaleOverride
     parameters
       # ICU style C locale (e.g. "en_US"). If not specified or empty, disables the override and
       # restores default host system locale.
       optional string locale

   # Overrides default host system timezone with the specified one.
   command setTimezoneOverride
     parameters
       # The timezone identifier. List of supported timezones:
       # https://source.chromium.org/chromium/chromium/deps/icu.git/+/faee8bc70570192d82d2978a71e2a615788597d1:source/data/misc/metaZones.txt
       # If empty, disables the override and restores default host system timezone.
       string timezoneId

   # Resizes the frame/viewport of the page. Note that this does not affect the frame's container
   # (e.g. browser window). Can be used to produce screenshots of the specified size. Not supported
   # on Android.
   experimental deprecated command setVisibleSize
     parameters
       # Frame width (DIP).
       integer width
       # Frame height (DIP).
       integer height

   # Notification sent after the virtual time budget for the current VirtualTimePolicy has run out.
   experimental event virtualTimeBudgetExpired

   # Enum of image types that can be disabled.
   experimental type DisabledImageType extends string
     enum
       avif
       webp

   experimental command setDisabledImageTypes
     parameters
       # Image types to disable.
       array of DisabledImageType imageTypes

   experimental command setHardwareConcurrencyOverride
     parameters
       # Hardware concurrency to report
       integer hardwareConcurrency

   # Allows overriding user agent with the given string.
   # `userAgentMetadata` must be set for Client Hint headers to be sent.
   command setUserAgentOverride
     parameters
       # User agent to use.
       string userAgent
       # Browser language to emulate.
       optional string acceptLanguage
       # The platform navigator.platform should return.
       optional string platform
       # To be sent in Sec-CH-UA-* headers and returned in navigator.userAgentData
       experimental optional UserAgentMetadata userAgentMetadata

   # Allows overriding the automation flag.
   experimental command setAutomationOverride
     parameters
       # Whether the override should be enabled.
       boolean enabled

   # Allows overriding the difference between the small and large viewport sizes, which determine the
   # value of the `svh` and `lvh` unit, respectively. Only supported for top-level frames.
   experimental command setSmallViewportHeightDifferenceOverride
     parameters
       # This will cause an element of size 100svh to be `difference` pixels smaller than an element
       # of size 100lvh.
       integer difference

 # This domain provides experimental commands only supported in headless mode.
 experimental domain HeadlessExperimental
   depends on Page
   depends on Runtime

   # Encoding options for a screenshot.
   type ScreenshotParams extends object
     properties
       # Image compression format (defaults to png).
       optional enum format
         jpeg
         png
         webp
       # Compression quality from range [0..100] (jpeg and webp only).
       optional integer quality
       # Optimize image encoding for speed, not for resulting size (defaults to false)
       optional boolean optimizeForSpeed

   # Sends a BeginFrame to the target and returns when the frame was completed. Optionally captures a
   # screenshot from the resulting frame. Requires that the target was created with enabled
   # BeginFrameControl. Designed for use with --run-all-compositor-stages-before-draw, see also
   # https://goo.gle/chrome-headless-rendering for more background.
   command beginFrame
     parameters
       # Timestamp of this BeginFrame in Renderer TimeTicks (milliseconds of uptime). If not set,
       # the current time will be used.
       optional number frameTimeTicks
       # The interval between BeginFrames that is reported to the compositor, in milliseconds.
       # Defaults to a 60 frames/second interval, i.e. about 16.666 milliseconds.
       optional number interval
       # Whether updates should not be committed and drawn onto the display. False by default. If
       # true, only side effects of the BeginFrame will be run, such as layout and animations, but
       # any visual updates may not be visible on the display or in screenshots.
       optional boolean noDisplayUpdates
       # If set, a screenshot of the frame will be captured and returned in the response. Otherwise,
       # no screenshot will be captured. Note that capturing a screenshot can fail, for example,
       # during renderer initialization. In such a case, no screenshot data will be returned.
       optional ScreenshotParams screenshot
     returns
       # Whether the BeginFrame resulted in damage and, thus, a new frame was committed to the
       # display. Reported for diagnostic uses, may be removed in the future.
       boolean hasDamage
       # Base64-encoded image data of the screenshot, if one was requested and successfully taken.
       optional binary screenshotData

   # Disables headless events for the target.
   deprecated command disable

   # Enables headless events for the target.
   deprecated command enable

 # Input/Output operations for streams produced by DevTools.
 domain IO

   # This is either obtained from another method or specified as `blob:<uuid>` where
   # `<uuid>` is an UUID of a Blob.
   type StreamHandle extends string

   # Close the stream, discard any temporary backing storage.
   command close
     parameters
       # Handle of the stream to close.
       StreamHandle handle

   # Read a chunk of the stream
   command read
     parameters
       # Handle of the stream to read.
       StreamHandle handle
       # Seek to the specified offset before reading (if not specified, proceed with offset
       # following the last read). Some types of streams may only support sequential reads.
       optional integer offset
       # Maximum number of bytes to read (left upon the agent discretion if not specified).
       optional integer size
     returns
       # Set if the data is base64-encoded
       optional boolean base64Encoded
       # Data that were read.
       string data
       # Set if the end-of-file condition occurred while reading.
       boolean eof

   # Return UUID of Blob object specified by a remote object id.
   command resolveBlob
     parameters
       # Object id of a Blob object wrapper.
       Runtime.RemoteObjectId objectId
     returns
       # UUID of the specified Blob.
       string uuid

 experimental domain FileSystem
   depends on Network
   depends on Storage

   type File extends object
     properties
       string name
       # Timestamp
       Network.TimeSinceEpoch lastModified
       # Size in bytes
       number size
       string type

   type Directory extends object
     properties
       string name
       array of string nestedDirectories
       # Files that are directly nested under this directory.
       array of File nestedFiles

   type BucketFileSystemLocator extends object
     properties
       # Storage key
       Storage.SerializedStorageKey storageKey
       # Bucket name. Not passing a `bucketName` will retrieve the default Bucket. (https://developer.mozilla.org/en-US/docs/Web/API/Storage_API#storage_buckets)
       optional string bucketName
       # Path to the directory using each path component as an array item.
       array of string pathComponents

   command getDirectory
     parameters
       BucketFileSystemLocator bucketFileSystemLocator
     returns
       # Returns the directory object at the path.
       Directory directory

 experimental domain IndexedDB
   depends on Runtime
   depends on Storage

   # Database with an array of object stores.
   type DatabaseWithObjectStores extends object
     properties
       # Database name.
       string name
       # Database version (type is not 'integer', as the standard
       # requires the version number to be 'unsigned long long')
       number version
       # Object stores in this database.
       array of ObjectStore objectStores

   # Object store.
   type ObjectStore extends object
     properties
       # Object store name.
       string name
       # Object store key path.
       KeyPath keyPath
       # If true, object store has auto increment flag set.
       boolean autoIncrement
       # Indexes in this object store.
       array of ObjectStoreIndex indexes

   # Object store index.
   type ObjectStoreIndex extends object
     properties
       # Index name.
       string name
       # Index key path.
       KeyPath keyPath
       # If true, index is unique.
       boolean unique
       # If true, index allows multiple entries for a key.
       boolean multiEntry

   # Key.
   type Key extends object
     properties
       # Key type.
       enum type
         number
         string
         date
         array
       # Number value.
       optional number number
       # String value.
       optional string string
       # Date value.
       optional number date
       # Array value.
       optional array of Key array

   # Key range.
   type KeyRange extends object
     properties
       # Lower bound.
       optional Key lower
       # Upper bound.
       optional Key upper
       # If true lower bound is open.
       boolean lowerOpen
       # If true upper bound is open.
       boolean upperOpen

   # Data entry.
   type DataEntry extends object
     properties
       # Key object.
       Runtime.RemoteObject key
       # Primary key object.
       Runtime.RemoteObject primaryKey
       # Value object.
       Runtime.RemoteObject value

   # Key path.
   type KeyPath extends object
     properties
       # Key path type.
       enum type
         null
         string
         array
       # String value.
       optional string string
       # Array value.
       optional array of string array

   # Clears all entries from an object store.
   command clearObjectStore
     parameters
       # At least and at most one of securityOrigin, storageKey, or storageBucket must be specified.
       # Security origin.
       optional string securityOrigin
       # Storage key.
       optional string storageKey
       # Storage bucket. If not specified, it uses the default bucket.
       optional Storage.StorageBucket storageBucket
       # Database name.
       string databaseName
       # Object store name.
       string objectStoreName

   # Deletes a database.
   command deleteDatabase
     parameters
       # At least and at most one of securityOrigin, storageKey, or storageBucket must be specified.
       # Security origin.
       optional string securityOrigin
       # Storage key.
       optional string storageKey
       # Storage bucket. If not specified, it uses the default bucket.
       optional Storage.StorageBucket storageBucket
       # Database name.
       string databaseName

   # Delete a range of entries from an object store
   command deleteObjectStoreEntries
     parameters
       # At least and at most one of securityOrigin, storageKey, or storageBucket must be specified.
       # Security origin.
       optional string securityOrigin
       # Storage key.
       optional string storageKey
       # Storage bucket. If not specified, it uses the default bucket.
       optional Storage.StorageBucket storageBucket
       string databaseName
       string objectStoreName
       # Range of entry keys to delete
       KeyRange keyRange

   # Disables events from backend.
   command disable

   # Enables events from backend.
   command enable

   # Requests data from object store or index.
   command requestData
     parameters
       # At least and at most one of securityOrigin, storageKey, or storageBucket must be specified.
       # Security origin.
       optional string securityOrigin
       # Storage key.
       optional string storageKey
       # Storage bucket. If not specified, it uses the default bucket.
       optional Storage.StorageBucket storageBucket
       # Database name.
       string databaseName
       # Object store name.
       string objectStoreName
       # Index name, empty string for object store data requests.
       string indexName
       # Number of records to skip.
       integer skipCount
       # Number of records to fetch.
       integer pageSize
       # Key range.
       optional KeyRange keyRange
     returns
       # Array of object store data entries.
       array of DataEntry objectStoreDataEntries
       # If true, there are more entries to fetch in the given range.
       boolean hasMore

   # Gets metadata of an object store.
   command getMetadata
     parameters
       # At least and at most one of securityOrigin, storageKey, or storageBucket must be specified.
       # Security origin.
       optional string securityOrigin
       # Storage key.
       optional string storageKey
       # Storage bucket. If not specified, it uses the default bucket.
       optional Storage.StorageBucket storageBucket
       # Database name.
       string databaseName
       # Object store name.
       string objectStoreName
     returns
       # the entries count
       number entriesCount
       # the current value of key generator, to become the next inserted
       # key into the object store. Valid if objectStore.autoIncrement
       # is true.
       number keyGeneratorValue

   # Requests database with given name in given frame.
   command requestDatabase
     parameters
       # At least and at most one of securityOrigin, storageKey, or storageBucket must be specified.
       # Security origin.
       optional string securityOrigin
       # Storage key.
       optional string storageKey
       # Storage bucket. If not specified, it uses the default bucket.
       optional Storage.StorageBucket storageBucket
       # Database name.
       string databaseName
     returns
       # Database with an array of object stores.
       DatabaseWithObjectStores databaseWithObjectStores

   # Requests database names for given security origin.
   command requestDatabaseNames
     parameters
       # At least and at most one of securityOrigin, storageKey, or storageBucket must be specified.
       # Security origin.
       optional string securityOrigin
       # Storage key.
       optional string storageKey
       # Storage bucket. If not specified, it uses the default bucket.
       optional Storage.StorageBucket storageBucket
     returns
       # Database names for origin.
       array of string databaseNames

 domain Input

   type TouchPoint extends object
     properties
       # X coordinate of the event relative to the main frame's viewport in CSS pixels.
       number x
       # Y coordinate of the event relative to the main frame's viewport in CSS pixels. 0 refers to
       # the top of the viewport and Y increases as it proceeds towards the bottom of the viewport.
       number y
       # X radius of the touch area (default: 1.0).
       optional number radiusX
       # Y radius of the touch area (default: 1.0).
       optional number radiusY
       # Rotation angle (default: 0.0).
       optional number rotationAngle
       # Force (default: 1.0).
       optional number force
       # The normalized tangential pressure, which has a range of [-1,1] (default: 0).
       experimental optional number tangentialPressure
       # The plane angle between the Y-Z plane and the plane containing both the stylus axis and the Y axis, in degrees of the range [-90,90], a positive tiltX is to the right (default: 0)
       optional number tiltX
       # The plane angle between the X-Z plane and the plane containing both the stylus axis and the X axis, in degrees of the range [-90,90], a positive tiltY is towards the user (default: 0).
       optional number tiltY
       # The clockwise rotation of a pen stylus around its own major axis, in degrees in the range [0,359] (default: 0).
       experimental optional integer twist
       # Identifier used to track touch sources between events, must be unique within an event.
       optional number id

   experimental type GestureSourceType extends string
     enum
       default
       touch
       mouse

   type MouseButton extends string
     enum
         none
         left
         middle
         right
         back
         forward

   # UTC time in seconds, counted from January 1, 1970.
   type TimeSinceEpoch extends number

   experimental type DragDataItem extends object
     properties
       # Mime type of the dragged data.
       string mimeType
       # Depending of the value of `mimeType`, it contains the dragged link,
       # text, HTML markup or any other data.
       string data

       # Title associated with a link. Only valid when `mimeType` == "text/uri-list".
       optional string title

       # Stores the base URL for the contained markup. Only valid when `mimeType`
       # == "text/html".
       optional string baseURL


   experimental type DragData extends object
     properties
       array of DragDataItem items
       # List of filenames that should be included when dropping
       optional array of string files
       # Bit field representing allowed drag operations. Copy = 1, Link = 2, Move = 16
       integer dragOperationsMask

   # Dispatches a drag event into the page.
   experimental command dispatchDragEvent
     parameters
       # Type of the drag event.
       enum type
         dragEnter
         dragOver
         drop
         dragCancel
       # X coordinate of the event relative to the main frame's viewport in CSS pixels.
       number x
       # Y coordinate of the event relative to the main frame's viewport in CSS pixels. 0 refers to
       # the top of the viewport and Y increases as it proceeds towards the bottom of the viewport.
       number y
       DragData data
       # Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8
       # (default: 0).
       optional integer modifiers

   # Dispatches a key event to the page.
   command dispatchKeyEvent
     parameters
       # Type of the key event.
       enum type
         keyDown
         keyUp
         rawKeyDown
         char
       # Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8
       # (default: 0).
       optional integer modifiers
       # Time at which the event occurred.
       optional TimeSinceEpoch timestamp
       # Text as generated by processing a virtual key code with a keyboard layout. Not needed for
       # for `keyUp` and `rawKeyDown` events (default: "")
       optional string text
       # Text that would have been generated by the keyboard if no modifiers were pressed (except for
       # shift). Useful for shortcut (accelerator) key handling (default: "").
       optional string unmodifiedText
       # Unique key identifier (e.g., 'U+0041') (default: "").
       optional string keyIdentifier
       # Unique DOM defined string value for each physical key (e.g., 'KeyA') (default: "").
       optional string code
       # Unique DOM defined string value describing the meaning of the key in the context of active
       # modifiers, keyboard layout, etc (e.g., 'AltGr') (default: "").
       optional string key
       # Windows virtual key code (default: 0).
       optional integer windowsVirtualKeyCode
       # Native virtual key code (default: 0).
       optional integer nativeVirtualKeyCode
       # Whether the event was generated from auto repeat (default: false).
       optional boolean autoRepeat
       # Whether the event was generated from the keypad (default: false).
       optional boolean isKeypad
       # Whether the event was a system key event (default: false).
       optional boolean isSystemKey
       # Whether the event was from the left or right side of the keyboard. 1=Left, 2=Right (default:
       # 0).
       optional integer location
       # Editing commands to send with the key event (e.g., 'selectAll') (default: []).
       # These are related to but not equal the command names used in `document.execCommand` and NSStandardKeyBindingResponding.
       # See https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/core/editing/commands/editor_command_names.h for valid command names.
       experimental optional array of string commands

   # This method emulates inserting text that doesn't come from a key press,
   # for example an emoji keyboard or an IME.
   experimental command insertText
     parameters
       # The text to insert.
       string text

   # This method sets the current candidate text for IME.
   # Use imeCommitComposition to commit the final text.
   # Use imeSetComposition with empty string as text to cancel composition.
   experimental command imeSetComposition
     parameters
       # The text to insert
       string text
       # selection start
       integer selectionStart
       # selection end
       integer selectionEnd
       # replacement start
       optional integer replacementStart
       # replacement end
       optional integer replacementEnd

   # Dispatches a mouse event to the page.
   command dispatchMouseEvent
     parameters
       # Type of the mouse event.
       enum type
         mousePressed
         mouseReleased
         mouseMoved
         mouseWheel
       # X coordinate of the event relative to the main frame's viewport in CSS pixels.
       number x
       # Y coordinate of the event relative to the main frame's viewport in CSS pixels. 0 refers to
       # the top of the viewport and Y increases as it proceeds towards the bottom of the viewport.
       number y
       # Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8
       # (default: 0).
       optional integer modifiers
       # Time at which the event occurred.
       optional TimeSinceEpoch timestamp
       # Mouse button (default: "none").
       optional MouseButton button
       # A number indicating which buttons are pressed on the mouse when a mouse event is triggered.
       # Left=1, Right=2, Middle=4, Back=8, Forward=16, None=0.
       optional integer buttons
       # Number of times the mouse button was clicked (default: 0).
       optional integer clickCount
       # The normalized pressure, which has a range of [0,1] (default: 0).
       experimental optional number force
       # The normalized tangential pressure, which has a range of [-1,1] (default: 0).
       experimental optional number tangentialPressure
       # The plane angle between the Y-Z plane and the plane containing both the stylus axis and the Y axis, in degrees of the range [-90,90], a positive tiltX is to the right (default: 0).
       optional number tiltX
       # The plane angle between the X-Z plane and the plane containing both the stylus axis and the X axis, in degrees of the range [-90,90], a positive tiltY is towards the user (default: 0).
       optional number tiltY
       # The clockwise rotation of a pen stylus around its own major axis, in degrees in the range [0,359] (default: 0).
       experimental optional integer twist
       # X delta in CSS pixels for mouse wheel event (default: 0).
       optional number deltaX
       # Y delta in CSS pixels for mouse wheel event (default: 0).
       optional number deltaY
       # Pointer type (default: "mouse").
       optional enum pointerType
         mouse
         pen

   # Dispatches a touch event to the page.
   command dispatchTouchEvent
     parameters
       # Type of the touch event. TouchEnd and TouchCancel must not contain any touch points, while
       # TouchStart and TouchMove must contains at least one.
       enum type
         touchStart
         touchEnd
         touchMove
         touchCancel
       # Active touch points on the touch device. One event per any changed point (compared to
       # previous touch event in a sequence) is generated, emulating pressing/moving/releasing points
       # one by one.
       array of TouchPoint touchPoints
       # Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8
       # (default: 0).
       optional integer modifiers
       # Time at which the event occurred.
       optional TimeSinceEpoch timestamp

   # Cancels any active dragging in the page.
   command cancelDragging

   # Emulates touch event from the mouse event parameters.
   experimental command emulateTouchFromMouseEvent
     parameters
       # Type of the mouse event.
       enum type
         mousePressed
         mouseReleased
         mouseMoved
         mouseWheel
       # X coordinate of the mouse pointer in DIP.
       integer x
       # Y coordinate of the mouse pointer in DIP.
       integer y
       # Mouse button. Only "none", "left", "right" are supported.
       MouseButton button
       # Time at which the event occurred (default: current time).
       optional TimeSinceEpoch timestamp
       # X delta in DIP for mouse wheel event (default: 0).
       optional number deltaX
       # Y delta in DIP for mouse wheel event (default: 0).
       optional number deltaY
       # Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8
       # (default: 0).
       optional integer modifiers
       # Number of times the mouse button was clicked (default: 0).
       optional integer clickCount

   # Ignores input events (useful while auditing page).
   command setIgnoreInputEvents
     parameters
       # Ignores input events processing when set to true.
       boolean ignore

   # Prevents default drag and drop behavior and instead emits `Input.dragIntercepted` events.
   # Drag and drop behavior can be directly controlled via `Input.dispatchDragEvent`.
   experimental command setInterceptDrags
     parameters
       boolean enabled

   # Synthesizes a pinch gesture over a time period by issuing appropriate touch events.
   experimental command synthesizePinchGesture
     parameters
       # X coordinate of the start of the gesture in CSS pixels.
       number x
       # Y coordinate of the start of the gesture in CSS pixels.
       number y
       # Relative scale factor after zooming (>1.0 zooms in, <1.0 zooms out).
       number scaleFactor
       # Relative pointer speed in pixels per second (default: 800).
       optional integer relativeSpeed
       # Which type of input events to be generated (default: 'default', which queries the platform
       # for the preferred input type).
       optional GestureSourceType gestureSourceType

   # Synthesizes a scroll gesture over a time period by issuing appropriate touch events.
   experimental command synthesizeScrollGesture
     parameters
       # X coordinate of the start of the gesture in CSS pixels.
       number x
       # Y coordinate of the start of the gesture in CSS pixels.
       number y
       # The distance to scroll along the X axis (positive to scroll left).
       optional number xDistance
       # The distance to scroll along the Y axis (positive to scroll up).
       optional number yDistance
       # The number of additional pixels to scroll back along the X axis, in addition to the given
       # distance.
       optional number xOverscroll
       # The number of additional pixels to scroll back along the Y axis, in addition to the given
       # distance.
       optional number yOverscroll
       # Prevent fling (default: true).
       optional boolean preventFling
       # Swipe speed in pixels per second (default: 800).
       optional integer speed
       # Which type of input events to be generated (default: 'default', which queries the platform
       # for the preferred input type).
       optional GestureSourceType gestureSourceType
       # The number of times to repeat the gesture (default: 0).
       optional integer repeatCount
       # The number of milliseconds delay between each repeat. (default: 250).
       optional integer repeatDelayMs
       # The name of the interaction markers to generate, if not empty (default: "").
       optional string interactionMarkerName

   # Synthesizes a tap gesture over a time period by issuing appropriate touch events.
   experimental command synthesizeTapGesture
     parameters
       # X coordinate of the start of the gesture in CSS pixels.
       number x
       # Y coordinate of the start of the gesture in CSS pixels.
       number y
       # Duration between touchdown and touchup events in ms (default: 50).
       optional integer duration
       # Number of times to perform the tap (e.g. 2 for double tap, default: 1).
       optional integer tapCount
       # Which type of input events to be generated (default: 'default', which queries the platform
       # for the preferred input type).
       optional GestureSourceType gestureSourceType

   # Emitted only when `Input.setInterceptDrags` is enabled. Use this data with `Input.dispatchDragEvent` to
   # restore normal drag and drop behavior.
   experimental event dragIntercepted
     parameters
       DragData data

 experimental domain Inspector

   # Disables inspector domain notifications.
   command disable

   # Enables inspector domain notifications.
   command enable

   # Fired when remote debugging connection is about to be terminated. Contains detach reason.
   event detached
     parameters
       # The reason why connection has been terminated.
       string reason

   # Fired when debugging target has crashed
   event targetCrashed

   # Fired when debugging target has reloaded after crash
   event targetReloadedAfterCrash

 experimental domain LayerTree
   depends on DOM

   # Unique Layer identifier.
   type LayerId extends string

   # Unique snapshot identifier.
   type SnapshotId extends string

   # Rectangle where scrolling happens on the main thread.
   type ScrollRect extends object
     properties
       # Rectangle itself.
       DOM.Rect rect
       # Reason for rectangle to force scrolling on the main thread
       enum type
         RepaintsOnScroll
         TouchEventHandler
         WheelEventHandler

   # Sticky position constraints.
   type StickyPositionConstraint extends object
     properties
       # Layout rectangle of the sticky element before being shifted
       DOM.Rect stickyBoxRect
       # Layout rectangle of the containing block of the sticky element
       DOM.Rect containingBlockRect
       # The nearest sticky layer that shifts the sticky box
       optional LayerId nearestLayerShiftingStickyBox
       # The nearest sticky layer that shifts the containing block
       optional LayerId nearestLayerShiftingContainingBlock

   # Serialized fragment of layer picture along with its offset within the layer.
   type PictureTile extends object
     properties
       # Offset from owning layer left boundary
       number x
       # Offset from owning layer top boundary
       number y
       # Base64-encoded snapshot data.
       binary picture

   # Information about a compositing layer.
   type Layer extends object
     properties
       # The unique id for this layer.
       LayerId layerId
       # The id of parent (not present for root).
       optional LayerId parentLayerId
       # The backend id for the node associated with this layer.
       optional DOM.BackendNodeId backendNodeId
       # Offset from parent layer, X coordinate.
       number offsetX
       # Offset from parent layer, Y coordinate.
       number offsetY
       # Layer width.
       number width
       # Layer height.
       number height
       # Transformation matrix for layer, default is identity matrix
       optional array of number transform
       # Transform anchor point X, absent if no transform specified
       optional number anchorX
       # Transform anchor point Y, absent if no transform specified
       optional number anchorY
       # Transform anchor point Z, absent if no transform specified
       optional number anchorZ
       # Indicates how many time this layer has painted.
       integer paintCount
       # Indicates whether this layer hosts any content, rather than being used for
       # transform/scrolling purposes only.
       boolean drawsContent
       # Set if layer is not visible.
       optional boolean invisible
       # Rectangles scrolling on main thread only.
       optional array of ScrollRect scrollRects
       # Sticky position constraint information
       optional StickyPositionConstraint stickyPositionConstraint

   # Array of timings, one per paint step.
   type PaintProfile extends array of number

   # Provides the reasons why the given layer was composited.
   command compositingReasons
     parameters
       # The id of the layer for which we want to get the reasons it was composited.
       LayerId layerId
     returns
       # A list of strings specifying reasons for the given layer to become composited.
       array of string compositingReasons
       # A list of strings specifying reason IDs for the given layer to become composited.
       array of string compositingReasonIds

   # Disables compositing tree inspection.
   command disable

   # Enables compositing tree inspection.
   command enable

   # Returns the snapshot identifier.
   command loadSnapshot
     parameters
       # An array of tiles composing the snapshot.
       array of PictureTile tiles
     returns
       # The id of the snapshot.
       SnapshotId snapshotId

   # Returns the layer snapshot identifier.
   command makeSnapshot
     parameters
       # The id of the layer.
       LayerId layerId
     returns
       # The id of the layer snapshot.
       SnapshotId snapshotId

   command profileSnapshot
     parameters
       # The id of the layer snapshot.
       SnapshotId snapshotId
       # The maximum number of times to replay the snapshot (1, if not specified).
       optional integer minRepeatCount
       # The minimum duration (in seconds) to replay the snapshot.
       optional number minDuration
       # The clip rectangle to apply when replaying the snapshot.
       optional DOM.Rect clipRect
     returns
       # The array of paint profiles, one per run.
       array of PaintProfile timings

   # Releases layer snapshot captured by the back-end.
   command releaseSnapshot
     parameters
       # The id of the layer snapshot.
       SnapshotId snapshotId

   # Replays the layer snapshot and returns the resulting bitmap.
   command replaySnapshot
     parameters
       # The id of the layer snapshot.
       SnapshotId snapshotId
       # The first step to replay from (replay from the very start if not specified).
       optional integer fromStep
       # The last step to replay to (replay till the end if not specified).
       optional integer toStep
       # The scale to apply while replaying (defaults to 1).
       optional number scale
     returns
       # A data: URL for resulting image.
       string dataURL

   # Replays the layer snapshot and returns canvas log.
   command snapshotCommandLog
     parameters
       # The id of the layer snapshot.
       SnapshotId snapshotId
     returns
       # The array of canvas function calls.
       array of object commandLog

   event layerPainted
     parameters
       # The id of the painted layer.
       LayerId layerId
       # Clip rectangle.
       DOM.Rect clip

   event layerTreeDidChange
     parameters
       # Layer tree, absent if not in the compositing mode.
       optional array of Layer layers

 # Provides access to log entries.
 domain Log
   depends on Runtime
   depends on Network

   # Log entry.
   type LogEntry extends object
     properties
       # Log entry source.
       enum source
         xml
         javascript
         network
         storage
         appcache
         rendering
         security
         deprecation
         worker
         violation
         intervention
         recommendation
         other
       # Log entry severity.
       enum level
         verbose
         info
         warning
         error
       # Logged text.
       string text
       optional enum category
         cors
       # Timestamp when this entry was added.
       Runtime.Timestamp timestamp
       # URL of the resource if known.
       optional string url
       # Line number in the resource.
       optional integer lineNumber
       # JavaScript stack trace.
       optional Runtime.StackTrace stackTrace
       # Identifier of the network request associated with this entry.
       optional Network.RequestId networkRequestId
       # Identifier of the worker associated with this entry.
       optional string workerId
       # Call arguments.
       optional array of Runtime.RemoteObject args

   # Violation configuration setting.
   type ViolationSetting extends object
     properties
       # Violation type.
       enum name
         longTask
         longLayout
         blockedEvent
         blockedParser
         discouragedAPIUse
         handler
         recurringHandler
       # Time threshold to trigger upon.
       number threshold

   # Clears the log.
   command clear

   # Disables log domain, prevents further log entries from being reported to the client.
   command disable

   # Enables log domain, sends the entries collected so far to the client by means of the
   # `entryAdded` notification.
   command enable

   # start violation reporting.
   command startViolationsReport
     parameters
       # Configuration for violations.
       array of ViolationSetting config

   # Stop violation reporting.
   command stopViolationsReport

   # Issued when new message was logged.
   event entryAdded
     parameters
       # The entry.
       LogEntry entry

 experimental domain Memory

   # Memory pressure level.
   type PressureLevel extends string
     enum
       moderate
       critical

   # Retruns current DOM object counters.
   command getDOMCounters
     returns
       integer documents
       integer nodes
       integer jsEventListeners

   # Retruns DOM object counters after preparing renderer for leak detection.
   command getDOMCountersForLeakDetection
     returns
       # DOM object counters.
       array of DOMCounter counters

   # Prepares for leak detection by terminating workers, stopping spellcheckers,
   # dropping non-essential internal caches, running garbage collections, etc.
   command prepareForLeakDetection

   # Simulate OomIntervention by purging V8 memory.
   command forciblyPurgeJavaScriptMemory

   # Enable/disable suppressing memory pressure notifications in all processes.
   command setPressureNotificationsSuppressed
     parameters
       # If true, memory pressure notifications will be suppressed.
       boolean suppressed

   # Simulate a memory pressure notification in all processes.
   command simulatePressureNotification
     parameters
       # Memory pressure level of the notification.
       PressureLevel level

   # Start collecting native memory profile.
   command startSampling
     parameters
       # Average number of bytes between samples.
       optional integer samplingInterval
       # Do not randomize intervals between samples.
       optional boolean suppressRandomness

   # Stop collecting native memory profile.
   command stopSampling

   # Retrieve native memory allocations profile
   # collected since renderer process startup.
   command getAllTimeSamplingProfile
     returns
       SamplingProfile profile

   # Retrieve native memory allocations profile
   # collected since browser process startup.
   command getBrowserSamplingProfile
     returns
       SamplingProfile profile

   # Retrieve native memory allocations profile collected since last
   # `startSampling` call.
   command getSamplingProfile
     returns
       SamplingProfile profile

   # Heap profile sample.
   type SamplingProfileNode extends object
     properties
       # Size of the sampled allocation.
       number size
       # Total bytes attributed to this sample.
       number total
       # Execution stack at the point of allocation.
       array of string stack

   # Array of heap profile samples.
   type SamplingProfile extends object
     properties
       array of SamplingProfileNode samples
       array of Module modules

   # Executable module information
   type Module extends object
     properties
       # Name of the module.
       string name
       # UUID of the module.
       string uuid
       # Base address where the module is loaded into memory. Encoded as a decimal
       # or hexadecimal (0x prefixed) string.
       string baseAddress
       # Size of the module in bytes.
       number size

   # DOM object counter data.
   type DOMCounter extends object
     properties
       # Object name. Note: object names should be presumed volatile and clients should not expect
       # the returned names to be consistent across runs.
       string name
       # Object count.
       integer count

 # Network domain allows tracking network activities of the page. It exposes information about http,
 # file, data and other requests and responses, their headers, bodies, timing, etc.
 domain Network
   depends on Debugger
   depends on Runtime
   depends on Security

   # Resource type as it was perceived by the rendering engine.
   type ResourceType extends string
     enum
       Document
       Stylesheet
       Image
       Media
       Font
       Script
       TextTrack
       XHR
       Fetch
       Prefetch
       EventSource
       WebSocket
       Manifest
       SignedExchange
       Ping
       CSPViolationReport
       Preflight
       FedCM
       Other

   # Unique loader identifier.
   type LoaderId extends string

   # Unique network request identifier.
   # Note that this does not identify individual HTTP requests that are part of
   # a network request.
   type RequestId extends string

   # Unique intercepted request identifier.
   type InterceptionId extends string

   # Network level fetch failure reason.
   type ErrorReason extends string
     enum
       Failed
       Aborted
       TimedOut
       AccessDenied
       ConnectionClosed
       ConnectionReset
       ConnectionRefused
       ConnectionAborted
       ConnectionFailed
       NameNotResolved
       InternetDisconnected
       AddressUnreachable
       BlockedByClient
       BlockedByResponse

   # UTC time in seconds, counted from January 1, 1970.
   type TimeSinceEpoch extends number

   # Monotonically increasing time in seconds since an arbitrary point in the past.
   type MonotonicTime extends number

   # Request / response headers as keys / values of JSON object.
   type Headers extends object

   # The underlying connection technology that the browser is supposedly using.
   type ConnectionType extends string
     enum
       none
       cellular2g
       cellular3g
       cellular4g
       bluetooth
       ethernet
       wifi
       wimax
       other

   # Represents the cookie's 'SameSite' status:
   # https://tools.ietf.org/html/draft-west-first-party-cookies
   type CookieSameSite extends string
     enum
       Strict
       Lax
       None

   # Represents the cookie's 'Priority' status:
   # https://tools.ietf.org/html/draft-west-cookie-priority-00
   experimental type CookiePriority extends string
     enum
       Low
       Medium
       High

   # Represents the source scheme of the origin that originally set the cookie.
   # A value of "Unset" allows protocol clients to emulate legacy cookie scope for the scheme.
   # This is a temporary ability and it will be removed in the future.
   experimental type CookieSourceScheme extends string
     enum
       Unset
       NonSecure
       Secure

   # Timing information for the request.
   type ResourceTiming extends object
     properties
       # Timing's requestTime is a baseline in seconds, while the other numbers are ticks in
       # milliseconds relatively to this requestTime.
       number requestTime
       # Started resolving proxy.
       number proxyStart
       # Finished resolving proxy.
       number proxyEnd
       # Started DNS address resolve.
       number dnsStart
       # Finished DNS address resolve.
       number dnsEnd
       # Started connecting to the remote host.
       number connectStart
       # Connected to the remote host.
       number connectEnd
       # Started SSL handshake.
       number sslStart
       # Finished SSL handshake.
       number sslEnd
       # Started running ServiceWorker.
       experimental number workerStart
       # Finished Starting ServiceWorker.
       experimental number workerReady
       # Started fetch event.
       experimental number workerFetchStart
       # Settled fetch event respondWith promise.
       experimental number workerRespondWithSettled
       # Started ServiceWorker static routing source evaluation.
       experimental optional number workerRouterEvaluationStart
       # Started cache lookup when the source was evaluated to `cache`.
       experimental optional number workerCacheLookupStart
       # Started sending request.
       number sendStart
       # Finished sending request.
       number sendEnd
       # Time the server started pushing request.
       experimental number pushStart
       # Time the server finished pushing request.
       experimental number pushEnd
       # Started receiving response headers.
       experimental number receiveHeadersStart
       # Finished receiving response headers.
       number receiveHeadersEnd

   # Loading priority of a resource request.
   type ResourcePriority extends string
     enum
       VeryLow
       Low
       Medium
       High
       VeryHigh

   # Post data entry for HTTP request
   type PostDataEntry extends object
     properties
       optional binary bytes

   # HTTP request data.
   type Request extends object
     properties
       # Request URL (without fragment).
       string url
       # Fragment of the requested URL starting with hash, if present.
       optional string urlFragment
       # HTTP request method.
       string method
       # HTTP request headers.
       Headers headers
       # HTTP POST request data.
       # Use postDataEntries instead.
       deprecated optional string postData
       # True when the request has POST data. Note that postData might still be omitted when this flag is true when the data is too long.
       optional boolean hasPostData
       # Request body elements (post data broken into individual entries).
       experimental optional array of PostDataEntry postDataEntries
       # The mixed content type of the request.
       optional Security.MixedContentType mixedContentType
       # Priority of the resource request at the time request is sent.
       ResourcePriority initialPriority
       # The referrer policy of the request, as defined in https://www.w3.org/TR/referrer-policy/
       enum referrerPolicy
         unsafe-url
         no-referrer-when-downgrade
         no-referrer
         origin
         origin-when-cross-origin
         same-origin
         strict-origin
         strict-origin-when-cross-origin
       # Whether is loaded via link preload.
       optional boolean isLinkPreload
       # Set for requests when the TrustToken API is used. Contains the parameters
       # passed by the developer (e.g. via "fetch") as understood by the backend.
       experimental optional TrustTokenParams trustTokenParams
       # True if this resource request is considered to be the 'same site' as the
       # request corresponding to the main frame.
       experimental optional boolean isSameSite

   # Details of a signed certificate timestamp (SCT).
   type SignedCertificateTimestamp extends object
     properties
       # Validation status.
       string status
       # Origin.
       string origin
       # Log name / description.
       string logDescription
       # Log ID.
       string logId
       # Issuance date. Unlike TimeSinceEpoch, this contains the number of
       # milliseconds since January 1, 1970, UTC, not the number of seconds.
       number timestamp
       # Hash algorithm.
       string hashAlgorithm
       # Signature algorithm.
       string signatureAlgorithm
       # Signature data.
       string signatureData

   # Security details about a request.
   type SecurityDetails extends object
     properties
       # Protocol name (e.g. "TLS 1.2" or "QUIC").
       string protocol
       # Key Exchange used by the connection, or the empty string if not applicable.
       string keyExchange
       # (EC)DH group used by the connection, if applicable.
       optional string keyExchangeGroup
       # Cipher name.
       string cipher
       # TLS MAC. Note that AEAD ciphers do not have separate MACs.
       optional string mac
       # Certificate ID value.
       Security.CertificateId certificateId
       # Certificate subject name.
       string subjectName
       # Subject Alternative Name (SAN) DNS names and IP addresses.
       array of string sanList
       # Name of the issuing CA.
       string issuer
       # Certificate valid from date.
       TimeSinceEpoch validFrom
       # Certificate valid to (expiration) date
       TimeSinceEpoch validTo
       # List of signed certificate timestamps (SCTs).
       array of SignedCertificateTimestamp signedCertificateTimestampList
       # Whether the request complied with Certificate Transparency policy
       CertificateTransparencyCompliance certificateTransparencyCompliance
       # The signature algorithm used by the server in the TLS server signature,
       # represented as a TLS SignatureScheme code point. Omitted if not
       # applicable or not known.
       optional integer serverSignatureAlgorithm
       # Whether the connection used Encrypted ClientHello
       boolean encryptedClientHello

   # Whether the request complied with Certificate Transparency policy.
   type CertificateTransparencyCompliance extends string
     enum
       unknown
       not-compliant
       compliant

   # The reason why request was blocked.
   type BlockedReason extends string
     enum
       other
       csp
       mixed-content
       origin
       inspector
       integrity
       subresource-filter
       content-type
       coep-frame-resource-needs-coep-header
       coop-sandboxed-iframe-cannot-navigate-to-coop-page
       corp-not-same-origin
       corp-not-same-origin-after-defaulted-to-same-origin-by-coep
       corp-not-same-origin-after-defaulted-to-same-origin-by-dip
       corp-not-same-origin-after-defaulted-to-same-origin-by-coep-and-dip
       corp-not-same-site
       sri-message-signature-mismatch

   # The reason why request was blocked.
   type CorsError extends string
     enum
       DisallowedByMode
       InvalidResponse
       WildcardOriginNotAllowed
       MissingAllowOriginHeader
       MultipleAllowOriginValues
       InvalidAllowOriginValue
       AllowOriginMismatch
       InvalidAllowCredentials
       CorsDisabledScheme
       PreflightInvalidStatus
       PreflightDisallowedRedirect
       PreflightWildcardOriginNotAllowed
       PreflightMissingAllowOriginHeader
       PreflightMultipleAllowOriginValues
       PreflightInvalidAllowOriginValue
       PreflightAllowOriginMismatch
       PreflightInvalidAllowCredentials
       # TODO(https://crbug.com/1263483): Remove this once frontend code does
       # not reference it anymore.
       PreflightMissingAllowExternal
       # TODO(https://crbug.com/1263483): Remove this once frontend code does
       # not reference it anymore.
       PreflightInvalidAllowExternal
       PreflightMissingAllowPrivateNetwork
       PreflightInvalidAllowPrivateNetwork
       InvalidAllowMethodsPreflightResponse
       InvalidAllowHeadersPreflightResponse
       MethodDisallowedByPreflightResponse
       HeaderDisallowedByPreflightResponse
       RedirectContainsCredentials
       # Request was a private network request initiated by a non-secure context.
       InsecurePrivateNetwork
       # Request carried a target IP address space property that did not match
       # the target resource's address space.
       InvalidPrivateNetworkAccess
       # Request was a private network request yet did not carry a target IP
       # address space.
       UnexpectedPrivateNetworkAccess
       NoCorsRedirectModeNotFollow
       # Request was a private network request and needed user permission yet did
       # not carry `Private-Network-Access-Id` in the preflight response.
       # https://github.com/WICG/private-network-access/blob/main/permission_prompt/explainer.md
       PreflightMissingPrivateNetworkAccessId
       # Request was a private network request and needed user permission yet did
       # not carry `Private-Network-Access-Name` in the preflight response.
       # https://github.com/WICG/private-network-access/blob/main/permission_prompt/explainer.md
       PreflightMissingPrivateNetworkAccessName
       # Request was a private network request and needed user permission yet not
       # able to request for permission.
       # https://github.com/WICG/private-network-access/blob/main/permission_prompt/explainer.md
       PrivateNetworkAccessPermissionUnavailable
       # Request was a private network request and is denied by user permission.
       # https://github.com/WICG/private-network-access/blob/main/permission_prompt/explainer.md
       PrivateNetworkAccessPermissionDenied
       # Request was a local network request and is denied by user permission.
       # https://github.com/explainers-by-googlers/local-network-access
       LocalNetworkAccessPermissionDenied

   type CorsErrorStatus extends object
     properties
       CorsError corsError
       string failedParameter

   # Source of serviceworker response.
   type ServiceWorkerResponseSource extends string
     enum
       cache-storage
       http-cache
       fallback-code
       network

   # Determines what type of Trust Token operation is executed and
   # depending on the type, some additional parameters. The values
   # are specified in third_party/blink/renderer/core/fetch/trust_token.idl.
   experimental type TrustTokenParams extends object
     properties
       TrustTokenOperationType operation

       # Only set for "token-redemption" operation and determine whether
       # to request a fresh SRR or use a still valid cached SRR.
       enum refreshPolicy
         UseCached
         Refresh

       # Origins of issuers from whom to request tokens or redemption
       # records.
       optional array of string issuers

   experimental type TrustTokenOperationType extends string
     enum
       # Type "token-request" in the Trust Token API.
       Issuance
       # Type "token-redemption" in the Trust Token API.
       Redemption
       # Type "send-redemption-record" in the Trust Token API.
       Signing

   # The reason why Chrome uses a specific transport protocol for HTTP semantics.
   experimental type AlternateProtocolUsage extends string
     enum
       # Alternate Protocol was used without racing a normal connection.
       alternativeJobWonWithoutRace
       # Alternate Protocol was used by winning a race with a normal connection.
       alternativeJobWonRace
       # Alternate Protocol was not used by losing a race with a normal connection.
       mainJobWonRace
       # Alternate Protocol was not used because no Alternate-Protocol information
       # was available when the request was issued, but an Alternate-Protocol header
       # was present in the response.
       mappingMissing
       # Alternate Protocol was not used because it was marked broken.
       broken
       # HTTPS DNS protocol upgrade job was used without racing with a normal
       # connection and an Alternate Protocol job.
       dnsAlpnH3JobWonWithoutRace
       # HTTPS DNS protocol upgrade job won a race with a normal connection and
       # an Alternate Protocol job.
       dnsAlpnH3JobWonRace
       # This value is used when the reason is unknown.
       unspecifiedReason

   # Source of service worker router.
   type ServiceWorkerRouterSource extends string
     enum
       network
       cache
       fetch-event
       race-network-and-fetch-handler
       race-network-and-cache

   experimental type ServiceWorkerRouterInfo extends object
     properties
       # ID of the rule matched. If there is a matched rule, this field will
       # be set, otherwiser no value will be set.
       optional integer ruleIdMatched
       # The router source of the matched rule. If there is a matched rule, this
       # field will be set, otherwise no value will be set.
       optional ServiceWorkerRouterSource matchedSourceType
       # The actual router source used.
       optional ServiceWorkerRouterSource actualSourceType

   # HTTP response data.
   type Response extends object
     properties
       # Response URL. This URL can be different from CachedResource.url in case of redirect.
       string url
       # HTTP response status code.
       integer status
       # HTTP response status text.
       string statusText
       # HTTP response headers.
       Headers headers
       # HTTP response headers text. This has been replaced by the headers in Network.responseReceivedExtraInfo.
       deprecated optional string headersText
       # Resource mimeType as determined by the browser.
       string mimeType
       # Resource charset as determined by the browser (if applicable).
       string charset
       # Refined HTTP request headers that were actually transmitted over the network.
       optional Headers requestHeaders
       # HTTP request headers text. This has been replaced by the headers in Network.requestWillBeSentExtraInfo.
       deprecated optional string requestHeadersText
       # Specifies whether physical connection was actually reused for this request.
       boolean connectionReused
       # Physical connection id that was actually used for this request.
       number connectionId
       # Remote IP address.
       optional string remoteIPAddress
       # Remote port.
       optional integer remotePort
       # Specifies that the request was served from the disk cache.
       optional boolean fromDiskCache
       # Specifies that the request was served from the ServiceWorker.
       optional boolean fromServiceWorker
       # Specifies that the request was served from the prefetch cache.
       optional boolean fromPrefetchCache
       # Specifies that the request was served from the prefetch cache.
       optional boolean fromEarlyHints
       # Information about how ServiceWorker Static Router API was used. If this
       # field is set with `matchedSourceType` field, a matching rule is found.
       # If this field is set without `matchedSource`, no matching rule is found.
       # Otherwise, the API is not used.
       experimental optional ServiceWorkerRouterInfo serviceWorkerRouterInfo
       # Total number of bytes received for this request so far.
       number encodedDataLength
       # Timing information for the given request.
       optional ResourceTiming timing
       # Response source of response from ServiceWorker.
       optional ServiceWorkerResponseSource serviceWorkerResponseSource
       # The time at which the returned response was generated.
       optional TimeSinceEpoch responseTime
       # Cache Storage Cache Name.
       optional string cacheStorageCacheName
       # Protocol used to fetch this request.
       optional string protocol
       # The reason why Chrome uses a specific transport protocol for HTTP semantics.
       experimental optional AlternateProtocolUsage alternateProtocolUsage
       # Security state of the request resource.
       Security.SecurityState securityState
       # Security details for the request.
       optional SecurityDetails securityDetails

   # WebSocket request data.
   type WebSocketRequest extends object
     properties
       # HTTP request headers.
       Headers headers

   # WebSocket response data.
   type WebSocketResponse extends object
     properties
       # HTTP response status code.
       integer status
       # HTTP response status text.
       string statusText
       # HTTP response headers.
       Headers headers
       # HTTP response headers text.
       optional string headersText
       # HTTP request headers.
       optional Headers requestHeaders
       # HTTP request headers text.
       optional string requestHeadersText

   # WebSocket message data. This represents an entire WebSocket message, not just a fragmented frame as the name suggests.
   type WebSocketFrame extends object
     properties
       # WebSocket message opcode.
       number opcode
       # WebSocket message mask.
       boolean mask
       # WebSocket message payload data.
       # If the opcode is 1, this is a text message and payloadData is a UTF-8 string.
       # If the opcode isn't 1, then payloadData is a base64 encoded string representing binary data.
       string payloadData

   # Information about the cached resource.
   type CachedResource extends object
     properties
       # Resource URL. This is the url of the original network request.
       string url
       # Type of this resource.
       ResourceType type
       # Cached response data.
       optional Response response
       # Cached response body size.
       number bodySize

   # Information about the request initiator.
   type Initiator extends object
     properties
       # Type of this initiator.
       enum type
         parser
         script
         preload
         SignedExchange
         preflight
         other
       # Initiator JavaScript stack trace, set for Script only.
       # Requires the Debugger domain to be enabled.
       optional Runtime.StackTrace stack
       # Initiator URL, set for Parser type or for Script type (when script is importing module) or for SignedExchange type.
       optional string url
       # Initiator line number, set for Parser type or for Script type (when script is importing
       # module) (0-based).
       optional number lineNumber
       # Initiator column number, set for Parser type or for Script type (when script is importing
       # module) (0-based).
       optional number columnNumber
       # Set if another request triggered this request (e.g. preflight).
       optional RequestId requestId

   # cookiePartitionKey object
   # The representation of the components of the key that are created by the cookiePartitionKey class contained in net/cookies/cookie_partition_key.h.
   experimental type CookiePartitionKey extends object
     properties
       # The site of the top-level URL the browser was visiting at the start
       # of the request to the endpoint that set the cookie.
       string topLevelSite
       # Indicates if the cookie has any ancestors that are cross-site to the topLevelSite.
       boolean hasCrossSiteAncestor

   # Cookie object
   type Cookie extends object
     properties
       # Cookie name.
       string name
       # Cookie value.
       string value
       # Cookie domain.
       string domain
       # Cookie path.
       string path
       # Cookie expiration date as the number of seconds since the UNIX epoch.
       number expires
       # Cookie size.
       integer size
       # True if cookie is http-only.
       boolean httpOnly
       # True if cookie is secure.
       boolean secure
       # True in case of session cookie.
       boolean session
       # Cookie SameSite type.
       optional CookieSameSite sameSite
       # Cookie Priority
       experimental CookiePriority priority
       # True if cookie is SameParty.
       experimental deprecated boolean sameParty
       # Cookie source scheme type.
       experimental CookieSourceScheme sourceScheme
       # Cookie source port. Valid values are {-1, [1, 65535]}, -1 indicates an unspecified port.
       # An unspecified port value allows protocol clients to emulate legacy cookie scope for the port.
       # This is a temporary ability and it will be removed in the future.
       experimental integer sourcePort
       # Cookie partition key.
       experimental optional CookiePartitionKey partitionKey
       # True if cookie partition key is opaque.
       experimental optional boolean partitionKeyOpaque

   # Types of reasons why a cookie may not be stored from a response.
   experimental type SetCookieBlockedReason extends string
     enum
       # The cookie had the "Secure" attribute but was not received over a secure connection.
       SecureOnly
       # The cookie had the "SameSite=Strict" attribute but came from a cross-origin response.
       # This includes navigation requests initiated by other origins.
       SameSiteStrict
       # The cookie had the "SameSite=Lax" attribute but came from a cross-origin response.
       SameSiteLax
       # The cookie didn't specify a "SameSite" attribute and was defaulted to "SameSite=Lax" and
       # broke the same rules specified in the SameSiteLax value.
       SameSiteUnspecifiedTreatedAsLax
       # The cookie had the "SameSite=None" attribute but did not specify the "Secure" attribute,
       # which is required in order to use "SameSite=None".
       SameSiteNoneInsecure
       # The cookie was not stored due to user preferences.
       UserPreferences
       # The cookie was blocked due to third-party cookie phaseout.
       ThirdPartyPhaseout
       # The cookie was blocked by third-party cookie blocking between sites in
       # the same First-Party Set.
       ThirdPartyBlockedInFirstPartySet
       # The syntax of the Set-Cookie header of the response was invalid.
       SyntaxError
       # The scheme of the connection is not allowed to store cookies.
       SchemeNotSupported
       # The cookie was not sent over a secure connection and would have overwritten a cookie with
       # the Secure attribute.
       OverwriteSecure
       # The cookie's domain attribute was invalid with regards to the current host url.
       InvalidDomain
       # The cookie used the "__Secure-" or "__Host-" prefix in its name and broke the additional
       # rules applied to cookies with these prefixes as defined in
       # https://tools.ietf.org/html/draft-west-cookie-prefixes-05
       InvalidPrefix
       # An unknown error was encountered when trying to store this cookie.
       UnknownError
       # The cookie had the "SameSite=Strict" attribute but came from a response
       # with the same registrable domain but a different scheme.
       # This includes navigation requests initiated by other origins.
       # This is the "Schemeful Same-Site" version of the blocked reason.
       SchemefulSameSiteStrict
       # The cookie had the "SameSite=Lax" attribute but came from a response
       # with the same registrable domain but a different scheme.
       # This is the "Schemeful Same-Site" version of the blocked reason.
       SchemefulSameSiteLax
       # The cookie didn't specify a "SameSite" attribute and was defaulted to
       # "SameSite=Lax" and broke the same rules specified in the SchemefulSameSiteLax
       # value.
       # This is the "Schemeful Same-Site" version of the blocked reason.
       SchemefulSameSiteUnspecifiedTreatedAsLax
       # The cookie had the "SameParty" attribute but came from a cross-party response.
       SamePartyFromCrossPartyContext
       # The cookie had the "SameParty" attribute but did not specify the "Secure" attribute
       # (which is required in order to use "SameParty"); or specified the "SameSite=Strict"
       # attribute (which is forbidden when using "SameParty").
       SamePartyConflictsWithOtherAttributes
       # The cookie's name/value pair size exceeded the size limit defined in
       # RFC6265bis.
       NameValuePairExceedsMaxSize
       # The cookie contained a forbidden ASCII control character, or the tab
       # character if it appears in the middle of the cookie name, value, an
       # attribute name, or an attribute value.
       DisallowedCharacter
       # Cookie contains no content or only whitespace.
       NoCookieContent

   # Types of reasons why a cookie may not be sent with a request.
   experimental type CookieBlockedReason extends string
     enum
       # The cookie had the "Secure" attribute and the connection was not secure.
       SecureOnly
       # The cookie's path was not within the request url's path.
       NotOnPath
       # The cookie's domain is not configured to match the request url's domain, even though they
       # share a common TLD+1 (TLD+1 of foo.bar.example.com is example.com).
       DomainMismatch
       # The cookie had the "SameSite=Strict" attribute and the request was made on on a different
       # site. This includes navigation requests initiated by other sites.
       SameSiteStrict
       # The cookie had the "SameSite=Lax" attribute and the request was made on a different site.
       # This does not include navigation requests initiated by other sites.
       SameSiteLax
       # The cookie didn't specify a SameSite attribute when it was stored and was defaulted to
       # "SameSite=Lax" and broke the same rules specified in the SameSiteLax value. The cookie had
       # to have been set with "SameSite=None" to enable third-party usage.
       SameSiteUnspecifiedTreatedAsLax
       # The cookie had the "SameSite=None" attribute and the connection was not secure. Cookies
       # without SameSite restrictions must be sent over a secure connection.
       SameSiteNoneInsecure
       # The cookie was not sent due to user preferences.
       UserPreferences
       # The cookie was blocked due to third-party cookie phaseout.
       ThirdPartyPhaseout
       # The cookie was blocked by third-party cookie blocking between sites in
       # the same First-Party Set.
       ThirdPartyBlockedInFirstPartySet
       # An unknown error was encountered when trying to send this cookie.
       UnknownError
       # The cookie had the "SameSite=Strict" attribute but came from a response
       # with the same registrable domain but a different scheme.
       # This includes navigation requests initiated by other origins.
       # This is the "Schemeful Same-Site" version of the blocked reason.
       SchemefulSameSiteStrict
       # The cookie had the "SameSite=Lax" attribute but came from a response
       # with the same registrable domain but a different scheme.
       # This is the "Schemeful Same-Site" version of the blocked reason.
       SchemefulSameSiteLax
       # The cookie didn't specify a "SameSite" attribute and was defaulted to
       # "SameSite=Lax" and broke the same rules specified in the SchemefulSameSiteLax
       # value.
       # This is the "Schemeful Same-Site" version of the blocked reason.
       SchemefulSameSiteUnspecifiedTreatedAsLax
       # The cookie had the "SameParty" attribute and the request was made from a cross-party context.
       SamePartyFromCrossPartyContext
       # The cookie's name/value pair size exceeded the size limit defined in
       # RFC6265bis.
       NameValuePairExceedsMaxSize
       # The cookie's source port value does not match the request origin's port.
       PortMismatch
       # The cookie's source scheme value does not match the request origin's scheme.
       SchemeMismatch
       # Unpartitioned cookie access from an anonymous context was blocked.
       AnonymousContext

   # Types of reasons why a cookie should have been blocked by 3PCD but is exempted for the request.
   experimental type CookieExemptionReason extends string
     enum
       # The default value. Cookie with this reason could either be blocked or included.
       None
       # The cookie should have been blocked by 3PCD but is exempted by explicit user setting.
       UserSetting
       # The cookie should have been blocked by 3PCD but is exempted by metadata mitigation.
       TPCDMetadata
       # The cookie should have been blocked by 3PCD but is exempted by Deprecation Trial mitigation.
       TPCDDeprecationTrial
       # The cookie should have been blocked by 3PCD but is exempted by Top-level Deprecation Trial mitigation.
       TopLevelTPCDDeprecationTrial
       # The cookie should have been blocked by 3PCD but is exempted by heuristics mitigation.
       TPCDHeuristics
       # The cookie should have been blocked by 3PCD but is exempted by Enterprise Policy.
       EnterprisePolicy
       # The cookie should have been blocked by 3PCD but is exempted by Storage Access API.
       StorageAccess
       # The cookie should have been blocked by 3PCD but is exempted by Top-level Storage Access API.
       TopLevelStorageAccess
       # The cookie should have been blocked by 3PCD but is exempted by the first-party URL scheme.
       Scheme
       # The cookie was included due to the 'allow-same-site-none-cookies' value being set in the sandboxing policy.
       SameSiteNoneCookiesInSandbox

   # A cookie which was not stored from a response with the corresponding reason.
   experimental type BlockedSetCookieWithReason extends object
     properties
       # The reason(s) this cookie was blocked.
       array of SetCookieBlockedReason blockedReasons
       # The string representing this individual cookie as it would appear in the header.
       # This is not the entire "cookie" or "set-cookie" header which could have multiple cookies.
       string cookieLine
       # The cookie object which represents the cookie which was not stored. It is optional because
       # sometimes complete cookie information is not available, such as in the case of parsing
       # errors.
       optional Cookie cookie

   # A cookie should have been blocked by 3PCD but is exempted and stored from a response with the
   # corresponding reason. A cookie could only have at most one exemption reason.
   experimental type ExemptedSetCookieWithReason extends object
     properties
       # The reason the cookie was exempted.
       CookieExemptionReason exemptionReason
       # The string representing this individual cookie as it would appear in the header.
       string cookieLine
       # The cookie object representing the cookie.
       Cookie cookie

   # A cookie associated with the request which may or may not be sent with it.
   # Includes the cookies itself and reasons for blocking or exemption.
   experimental type AssociatedCookie extends object
     properties
       # The cookie object representing the cookie which was not sent.
       Cookie cookie
       # The reason(s) the cookie was blocked. If empty means the cookie is included.
       array of CookieBlockedReason blockedReasons
       # The reason the cookie should have been blocked by 3PCD but is exempted. A cookie could
       # only have at most one exemption reason.
       optional CookieExemptionReason exemptionReason

   # Cookie parameter object
   type CookieParam extends object
     properties
       # Cookie name.
       string name
       # Cookie value.
       string value
       # The request-URI to associate with the setting of the cookie. This value can affect the
       # default domain, path, source port, and source scheme values of the created cookie.
       optional string url
       # Cookie domain.
       optional string domain
       # Cookie path.
       optional string path
       # True if cookie is secure.
       optional boolean secure
       # True if cookie is http-only.
       optional boolean httpOnly
       # Cookie SameSite type.
       optional CookieSameSite sameSite
       # Cookie expiration date, session cookie if not set
       optional TimeSinceEpoch expires
       # Cookie Priority.
       experimental optional CookiePriority priority
       # True if cookie is SameParty.
       experimental optional boolean sameParty
       # Cookie source scheme type.
       experimental optional CookieSourceScheme sourceScheme
       # Cookie source port. Valid values are {-1, [1, 65535]}, -1 indicates an unspecified port.
       # An unspecified port value allows protocol clients to emulate legacy cookie scope for the port.
       # This is a temporary ability and it will be removed in the future.
       experimental optional integer sourcePort
       # Cookie partition key. If not set, the cookie will be set as not partitioned.
       experimental optional CookiePartitionKey partitionKey

   # Authorization challenge for HTTP status code 401 or 407.
   experimental type AuthChallenge extends object
     properties
       # Source of the authentication challenge.
       optional enum source
         Server
         Proxy
       # Origin of the challenger.
       string origin
       # The authentication scheme used, such as basic or digest
       string scheme
       # The realm of the challenge. May be empty.
       string realm

   # Response to an AuthChallenge.
   experimental type AuthChallengeResponse extends object
     properties
       # The decision on what to do in response to the authorization challenge.  Default means
       # deferring to the default behavior of the net stack, which will likely either the Cancel
       # authentication or display a popup dialog box.
       enum response
         Default
         CancelAuth
         ProvideCredentials
       # The username to provide, possibly empty. Should only be set if response is
       # ProvideCredentials.
       optional string username
       # The password to provide, possibly empty. Should only be set if response is
       # ProvideCredentials.
       optional string password

   # Stages of the interception to begin intercepting. Request will intercept before the request is
   # sent. Response will intercept after the response is received.
   experimental type InterceptionStage extends string
     enum
       Request
       HeadersReceived

   # Request pattern for interception.
   experimental type RequestPattern extends object
     properties
       # Wildcards (`'*'` -> zero or more, `'?'` -> exactly one) are allowed. Escape character is
       # backslash. Omitting is equivalent to `"*"`.
       optional string urlPattern
       # If set, only requests for matching resource types will be intercepted.
       optional ResourceType resourceType
       # Stage at which to begin intercepting requests. Default is Request.
       optional InterceptionStage interceptionStage

   # Information about a signed exchange signature.
   # https://wicg.github.io/webpackage/draft-yasskin-httpbis-origin-signed-exchanges-impl.html#rfc.section.3.1
   experimental type SignedExchangeSignature extends object
     properties
       # Signed exchange signature label.
       string label
       # The hex string of signed exchange signature.
       string signature
       # Signed exchange signature integrity.
       string integrity
       # Signed exchange signature cert Url.
       optional string certUrl
       # The hex string of signed exchange signature cert sha256.
       optional string certSha256
       # Signed exchange signature validity Url.
       string validityUrl
       # Signed exchange signature date.
       integer date
       # Signed exchange signature expires.
       integer expires
       # The encoded certificates.
       optional array of string certificates

   # Information about a signed exchange header.
   # https://wicg.github.io/webpackage/draft-yasskin-httpbis-origin-signed-exchanges-impl.html#cbor-representation
   experimental type SignedExchangeHeader extends object
     properties
       # Signed exchange request URL.
       string requestUrl
       # Signed exchange response code.
       integer responseCode
       # Signed exchange response headers.
       Headers responseHeaders
       # Signed exchange response signature.
       array of SignedExchangeSignature signatures
       # Signed exchange header integrity hash in the form of `sha256-<base64-hash-value>`.
       string headerIntegrity

   # Field type for a signed exchange related error.
   experimental type SignedExchangeErrorField extends string
     enum
       signatureSig
       signatureIntegrity
       signatureCertUrl
       signatureCertSha256
       signatureValidityUrl
       signatureTimestamps

   # Information about a signed exchange response.
   experimental type SignedExchangeError extends object
     properties
       # Error message.
       string message
       # The index of the signature which caused the error.
       optional integer signatureIndex
       # The field which caused the error.
       optional SignedExchangeErrorField errorField

   # Information about a signed exchange response.
   experimental type SignedExchangeInfo extends object
     properties
       # The outer response of signed HTTP exchange which was received from network.
       Response outerResponse
       # Information about the signed exchange header.
       optional SignedExchangeHeader header
       # Security details for the signed exchange header.
       optional SecurityDetails securityDetails
       # Errors occurred while handling the signed exchange.
       optional array of SignedExchangeError errors

   # List of content encodings supported by the backend.
   experimental type ContentEncoding extends string
     enum
       deflate
       gzip
       br
       zstd

   # Sets a list of content encodings that will be accepted. Empty list means no encoding is accepted.
   experimental command setAcceptedEncodings
     parameters
       # List of accepted content encodings.
       array of ContentEncoding encodings

   # Clears accepted encodings set by setAcceptedEncodings
   experimental command clearAcceptedEncodingsOverride

   # Tells whether clearing browser cache is supported.
   deprecated command canClearBrowserCache
     returns
       # True if browser cache can be cleared.
       boolean result

   # Tells whether clearing browser cookies is supported.
   deprecated command canClearBrowserCookies
     returns
       # True if browser cookies can be cleared.
       boolean result

   # Tells whether emulation of network conditions is supported.
   deprecated command canEmulateNetworkConditions
     returns
       # True if emulation of network conditions is supported.
       boolean result

   # Clears browser cache.
   command clearBrowserCache

   # Clears browser cookies.
   command clearBrowserCookies

   # Response to Network.requestIntercepted which either modifies the request to continue with any
   # modifications, or blocks it, or completes it with the provided response bytes. If a network
   # fetch occurs as a result which encounters a redirect an additional Network.requestIntercepted
   # event will be sent with the same InterceptionId.
   # Deprecated, use Fetch.continueRequest, Fetch.fulfillRequest and Fetch.failRequest instead.
   experimental deprecated command continueInterceptedRequest
     parameters
       InterceptionId interceptionId
       # If set this causes the request to fail with the given reason. Passing `Aborted` for requests
       # marked with `isNavigationRequest` also cancels the navigation. Must not be set in response
       # to an authChallenge.
       optional ErrorReason errorReason
       # If set the requests completes using with the provided base64 encoded raw response, including
       # HTTP status line and headers etc... Must not be set in response to an authChallenge.
       optional binary rawResponse
       # If set the request url will be modified in a way that's not observable by page. Must not be
       # set in response to an authChallenge.
       optional string url
       # If set this allows the request method to be overridden. Must not be set in response to an
       # authChallenge.
       optional string method
       # If set this allows postData to be set. Must not be set in response to an authChallenge.
       optional string postData
       # If set this allows the request headers to be changed. Must not be set in response to an
       # authChallenge.
       optional Headers headers
       # Response to a requestIntercepted with an authChallenge. Must not be set otherwise.
       optional AuthChallengeResponse authChallengeResponse

   # Deletes browser cookies with matching name and url or domain/path/partitionKey pair.
   command deleteCookies
     parameters
       # Name of the cookies to remove.
       string name
       # If specified, deletes all the cookies with the given name where domain and path match
       # provided URL.
       optional string url
       # If specified, deletes only cookies with the exact domain.
       optional string domain
       # If specified, deletes only cookies with the exact path.
       optional string path
       # If specified, deletes only cookies with the the given name and partitionKey where
       # all partition key attributes match the cookie partition key attribute.
       experimental optional CookiePartitionKey partitionKey

   # Disables network tracking, prevents network events from being sent to the client.
   command disable

   # Activates emulation of network conditions.
   command emulateNetworkConditions
     parameters
       # True to emulate internet disconnection.
       boolean offline
       # Minimum latency from request sent to response headers received (ms).
       number latency
       # Maximal aggregated download throughput (bytes/sec). -1 disables download throttling.
       number downloadThroughput
       # Maximal aggregated upload throughput (bytes/sec).  -1 disables upload throttling.
       number uploadThroughput
       # Connection type if known.
       optional ConnectionType connectionType
       # WebRTC packet loss (percent, 0-100). 0 disables packet loss emulation, 100 drops all the packets.
       experimental optional number packetLoss
       # WebRTC packet queue length (packet). 0 removes any queue length limitations.
       experimental optional integer packetQueueLength
       # WebRTC packetReordering feature.
       experimental optional boolean packetReordering

   # Enables network tracking, network events will now be delivered to the client.
   command enable
     parameters
       # Buffer size in bytes to use when preserving network payloads (XHRs, etc).
       experimental optional integer maxTotalBufferSize
       # Per-resource buffer size in bytes to use when preserving network payloads (XHRs, etc).
       experimental optional integer maxResourceBufferSize
       # Longest post body size (in bytes) that would be included in requestWillBeSent notification
       optional integer maxPostDataSize
       # Whether DirectSocket chunk send/receive events should be reported.
       experimental optional boolean reportDirectSocketTraffic

   # Returns all browser cookies. Depending on the backend support, will return detailed cookie
   # information in the `cookies` field.
   # Deprecated. Use Storage.getCookies instead.
   deprecated command getAllCookies
     returns
       # Array of cookie objects.
       array of Cookie cookies

   # Returns the DER-encoded certificate.
   experimental command getCertificate
     parameters
       # Origin to get certificate for.
       string origin
     returns
       array of string tableNames

   # Returns all browser cookies for the current URL. Depending on the backend support, will return
   # detailed cookie information in the `cookies` field.
   command getCookies
     parameters
       # The list of URLs for which applicable cookies will be fetched.
       # If not specified, it's assumed to be set to the list containing
       # the URLs of the page and all of its subframes.
       optional array of string urls
     returns
       # Array of cookie objects.
       array of Cookie cookies

   # Returns content served for the given request.
   command getResponseBody
     parameters
       # Identifier of the network request to get content for.
       RequestId requestId
     returns
       # Response body.
       string body
       # True, if content was sent as base64.
       boolean base64Encoded

   # Returns post data sent with the request. Returns an error when no data was sent with the request.
   command getRequestPostData
     parameters
       # Identifier of the network request to get content for.
       RequestId requestId
     returns
       # Request body string, omitting files from multipart requests
       string postData

   # Returns content served for the given currently intercepted request.
   experimental command getResponseBodyForInterception
     parameters
       # Identifier for the intercepted request to get body for.
       InterceptionId interceptionId
     returns
       # Response body.
       string body
       # True, if content was sent as base64.
       boolean base64Encoded

   # Returns a handle to the stream representing the response body. Note that after this command,
   # the intercepted request can't be continued as is -- you either need to cancel it or to provide
   # the response body. The stream only supports sequential read, IO.read will fail if the position
   # is specified.
   experimental command takeResponseBodyForInterceptionAsStream
     parameters
       InterceptionId interceptionId
     returns
       IO.StreamHandle stream

   # This method sends a new XMLHttpRequest which is identical to the original one. The following
   # parameters should be identical: method, url, async, request body, extra headers, withCredentials
   # attribute, user, password.
   experimental command replayXHR
     parameters
       # Identifier of XHR to replay.
       RequestId requestId

   # Searches for given string in response content.
   experimental command searchInResponseBody
     parameters
       # Identifier of the network response to search.
       RequestId requestId
       # String to search for.
       string query
       # If true, search is case sensitive.
       optional boolean caseSensitive
       # If true, treats string parameter as regex.
       optional boolean isRegex
     returns
       # List of search matches.
       array of Debugger.SearchMatch result

   # Blocks URLs from loading.
   experimental command setBlockedURLs
     parameters
       # URL patterns to block. Wildcards ('*') are allowed.
       array of string urls

   # Toggles ignoring of service worker for each request.
   command setBypassServiceWorker
     parameters
       # Bypass service worker and load from network.
       boolean bypass

   # Toggles ignoring cache for each request. If `true`, cache will not be used.
   command setCacheDisabled
     parameters
       # Cache disabled state.
       boolean cacheDisabled

   # Sets a cookie with the given cookie data; may overwrite equivalent cookies if they exist.
   command setCookie
     parameters
       # Cookie name.
       string name
       # Cookie value.
       string value
       # The request-URI to associate with the setting of the cookie. This value can affect the
       # default domain, path, source port, and source scheme values of the created cookie.
       optional string url
       # Cookie domain.
       optional string domain
       # Cookie path.
       optional string path
       # True if cookie is secure.
       optional boolean secure
       # True if cookie is http-only.
       optional boolean httpOnly
       # Cookie SameSite type.
       optional CookieSameSite sameSite
       # Cookie expiration date, session cookie if not set
       optional TimeSinceEpoch expires
       # Cookie Priority type.
       experimental optional CookiePriority priority
       # True if cookie is SameParty.
       experimental optional boolean sameParty
       # Cookie source scheme type.
       experimental optional CookieSourceScheme sourceScheme
       # Cookie source port. Valid values are {-1, [1, 65535]}, -1 indicates an unspecified port.
       # An unspecified port value allows protocol clients to emulate legacy cookie scope for the port.
       # This is a temporary ability and it will be removed in the future.
       experimental optional integer sourcePort
       # Cookie partition key. If not set, the cookie will be set as not partitioned.
       experimental optional CookiePartitionKey partitionKey
     returns
       # Always set to true. If an error occurs, the response indicates protocol error.
       deprecated boolean success

   # Sets given cookies.
   command setCookies
     parameters
       # Cookies to be set.
       array of CookieParam cookies

   # Specifies whether to always send extra HTTP headers with the requests from this page.
   command setExtraHTTPHeaders
     parameters
       # Map with extra HTTP headers.
       Headers headers

   # Specifies whether to attach a page script stack id in requests
   experimental command setAttachDebugStack
     parameters
       # Whether to attach a page script stack for debugging purpose.
       boolean enabled

   # Sets the requests to intercept that match the provided patterns and optionally resource types.
   # Deprecated, please use Fetch.enable instead.
   experimental deprecated command setRequestInterception
     parameters
       # Requests matching any of these patterns will be forwarded and wait for the corresponding
       # continueInterceptedRequest call.
       array of RequestPattern patterns

   # Allows overriding user agent with the given string.
   command setUserAgentOverride
     redirect Emulation
     parameters
       # User agent to use.
       string userAgent
       # Browser language to emulate.
       optional string acceptLanguage
       # The platform navigator.platform should return.
       optional string platform
       # To be sent in Sec-CH-UA-* headers and returned in navigator.userAgentData
       experimental optional Emulation.UserAgentMetadata userAgentMetadata


   # Fired when data chunk was received over the network.
   event dataReceived
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # Data chunk length.
       integer dataLength
       # Actual bytes received (might be less than dataLength for compressed encodings).
       integer encodedDataLength
       # Data that was received.
       experimental optional binary data

   # Enables streaming of the response for the given requestId.
   # If enabled, the dataReceived event contains the data that was received during streaming.
   experimental command streamResourceContent
     parameters
       # Identifier of the request to stream.
       RequestId requestId
     returns
       # Data that has been buffered until streaming is enabled.
       binary bufferedData

   # Fired when EventSource message is received.
   event eventSourceMessageReceived
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # Message type.
       string eventName
       # Message identifier.
       string eventId
       # Message content.
       string data

   # Fired when HTTP request has failed to load.
   event loadingFailed
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # Resource type.
       ResourceType type
       # Error message. List of network errors: https://cs.chromium.org/chromium/src/net/base/net_error_list.h
       string errorText
       # True if loading was canceled.
       optional boolean canceled
       # The reason why loading was blocked, if any.
       optional BlockedReason blockedReason
        # The reason why loading was blocked by CORS, if any.
       optional CorsErrorStatus corsErrorStatus

   # Fired when HTTP request has finished loading.
   event loadingFinished
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # Total number of bytes received for this request.
       number encodedDataLength

   # Details of an intercepted HTTP request, which must be either allowed, blocked, modified or
   # mocked.
   # Deprecated, use Fetch.requestPaused instead.
   experimental deprecated event requestIntercepted
     parameters
       # Each request the page makes will have a unique id, however if any redirects are encountered
       # while processing that fetch, they will be reported with the same id as the original fetch.
       # Likewise if HTTP authentication is needed then the same fetch id will be used.
       InterceptionId interceptionId
       Request request
       # The id of the frame that initiated the request.
       Page.FrameId frameId
       # How the requested resource will be used.
       ResourceType resourceType
       # Whether this is a navigation request, which can abort the navigation completely.
       boolean isNavigationRequest
       # Set if the request is a navigation that will result in a download.
       # Only present after response is received from the server (i.e. HeadersReceived stage).
       optional boolean isDownload
       # Redirect location, only sent if a redirect was intercepted.
       optional string redirectUrl
       # Details of the Authorization Challenge encountered. If this is set then
       # continueInterceptedRequest must contain an authChallengeResponse.
       optional AuthChallenge authChallenge
       # Response error if intercepted at response stage or if redirect occurred while intercepting
       # request.
       optional ErrorReason responseErrorReason
       # Response code if intercepted at response stage or if redirect occurred while intercepting
       # request or auth retry occurred.
       optional integer responseStatusCode
       # Response headers if intercepted at the response stage or if redirect occurred while
       # intercepting request or auth retry occurred.
       optional Headers responseHeaders
       # If the intercepted request had a corresponding requestWillBeSent event fired for it, then
       # this requestId will be the same as the requestId present in the requestWillBeSent event.
       optional RequestId requestId

   # Fired if request ended up loading from cache.
   event requestServedFromCache
     parameters
       # Request identifier.
       RequestId requestId

   # Fired when page is about to send HTTP request.
   event requestWillBeSent
     parameters
       # Request identifier.
       RequestId requestId
       # Loader identifier. Empty string if the request is fetched from worker.
       LoaderId loaderId
       # URL of the document this request is loaded for.
       string documentURL
       # Request data.
       Request request
       # Timestamp.
       MonotonicTime timestamp
       # Timestamp.
       TimeSinceEpoch wallTime
       # Request initiator.
       Initiator initiator
       # In the case that redirectResponse is populated, this flag indicates whether
       # requestWillBeSentExtraInfo and responseReceivedExtraInfo events will be or were emitted
       # for the request which was just redirected.
       experimental boolean redirectHasExtraInfo
       # Redirect response data.
       optional Response redirectResponse
       # Type of this resource.
       optional ResourceType type
       # Frame identifier.
       optional Page.FrameId frameId
       # Whether the request is initiated by a user gesture. Defaults to false.
       optional boolean hasUserGesture

   # Fired when resource loading priority is changed
   experimental event resourceChangedPriority
     parameters
       # Request identifier.
       RequestId requestId
       # New priority
       ResourcePriority newPriority
       # Timestamp.
       MonotonicTime timestamp

   # Fired when a signed exchange was received over the network
   experimental event signedExchangeReceived
     parameters
       # Request identifier.
       RequestId requestId
       # Information about the signed exchange response.
       SignedExchangeInfo info

   # Fired when HTTP response is available.
   event responseReceived
     parameters
       # Request identifier.
       RequestId requestId
       # Loader identifier. Empty string if the request is fetched from worker.
       LoaderId loaderId
       # Timestamp.
       MonotonicTime timestamp
       # Resource type.
       ResourceType type
       # Response data.
       Response response
       # Indicates whether requestWillBeSentExtraInfo and responseReceivedExtraInfo events will be
       # or were emitted for this request.
       experimental boolean hasExtraInfo
       # Frame identifier.
       optional Page.FrameId frameId

   # Fired when WebSocket is closed.
   event webSocketClosed
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp

   # Fired upon WebSocket creation.
   event webSocketCreated
     parameters
       # Request identifier.
       RequestId requestId
       # WebSocket request URL.
       string url
       # Request initiator.
       optional Initiator initiator

   # Fired when WebSocket message error occurs.
   event webSocketFrameError
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # WebSocket error message.
       string errorMessage

   # Fired when WebSocket message is received.
   event webSocketFrameReceived
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # WebSocket response data.
       WebSocketFrame response

   # Fired when WebSocket message is sent.
   event webSocketFrameSent
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # WebSocket response data.
       WebSocketFrame response

   # Fired when WebSocket handshake response becomes available.
   event webSocketHandshakeResponseReceived
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # WebSocket response data.
       WebSocketResponse response

   # Fired when WebSocket is about to initiate handshake.
   event webSocketWillSendHandshakeRequest
     parameters
       # Request identifier.
       RequestId requestId
       # Timestamp.
       MonotonicTime timestamp
       # UTC Timestamp.
       TimeSinceEpoch wallTime
       # WebSocket request data.
       WebSocketRequest request

   # Fired upon WebTransport creation.
   event webTransportCreated
     parameters
       # WebTransport identifier.
       RequestId transportId
       # WebTransport request URL.
       string url
       # Timestamp.
       MonotonicTime timestamp
       # Request initiator.
       optional Initiator initiator

   # Fired when WebTransport handshake is finished.
   event webTransportConnectionEstablished
     parameters
       # WebTransport identifier.
       RequestId transportId
       # Timestamp.
       MonotonicTime timestamp

   # Fired when WebTransport is disposed.
   event webTransportClosed
     parameters
       # WebTransport identifier.
       RequestId transportId
       # Timestamp.
       MonotonicTime timestamp

   experimental type DirectSocketDnsQueryType extends string
     enum
       ipv4
       ipv6

   experimental type DirectTCPSocketOptions extends object
     properties
       # TCP_NODELAY option
       boolean noDelay
       # Expected to be unsigned integer.
       optional number keepAliveDelay
       # Expected to be unsigned integer.
       optional number sendBufferSize
       # Expected to be unsigned integer.
       optional number receiveBufferSize
       optional DirectSocketDnsQueryType dnsQueryType


   # Fired upon direct_socket.TCPSocket creation.
   experimental event directTCPSocketCreated
     parameters
       RequestId identifier
       string remoteAddr
       # Unsigned int 16.
       integer remotePort
       DirectTCPSocketOptions options
       MonotonicTime timestamp
       optional Initiator initiator

   # Fired when direct_socket.TCPSocket connection is opened.
   experimental event directTCPSocketOpened
     parameters
       RequestId identifier
       string remoteAddr
       # Expected to be unsigned integer.
       integer remotePort
       MonotonicTime timestamp
       optional string localAddr
       # Expected to be unsigned integer.
       optional integer localPort

   # Fired when direct_socket.TCPSocket is aborted.
   experimental event directTCPSocketAborted
     parameters
       RequestId identifier
       string errorMessage
       MonotonicTime timestamp

   # Fired when direct_socket.TCPSocket is closed.
   experimental event directTCPSocketClosed
     parameters
       RequestId identifier
       MonotonicTime timestamp

   # Fired when data is sent to tcp direct socket stream.
   experimental event directTCPSocketChunkSent
     parameters
       RequestId identifier
       binary data
       MonotonicTime timestamp

   # Fired when data is received from tcp direct socket stream.
   experimental event directTCPSocketChunkReceived
     parameters
       RequestId identifier
       binary data
       MonotonicTime timestamp

   experimental type DirectUDPSocketOptions extends object
     properties
       optional string remoteAddr
       # Unsigned int 16.
       optional integer remotePort

       optional string localAddr
       # Unsigned int 16.
       optional integer localPort

       optional DirectSocketDnsQueryType dnsQueryType

       # Expected to be unsigned integer.
       optional number sendBufferSize
       # Expected to be unsigned integer.
       optional number receiveBufferSize


   # Fired upon direct_socket.UDPSocket creation.
   experimental event directUDPSocketCreated
     parameters
       RequestId identifier
       DirectUDPSocketOptions options
       MonotonicTime timestamp
       optional Initiator initiator

   # Fired when direct_socket.UDPSocket connection is opened.
   experimental event directUDPSocketOpened
     parameters
       RequestId identifier
       string localAddr
       # Expected to be unsigned integer.
       integer localPort
       MonotonicTime timestamp
       optional string remoteAddr
       # Expected to be unsigned integer.
       optional integer remotePort

   # Fired when direct_socket.UDPSocket is aborted.
   experimental event directUDPSocketAborted
     parameters
       RequestId identifier
       string errorMessage
       MonotonicTime timestamp

   # Fired when direct_socket.UDPSocket is closed.
   experimental event directUDPSocketClosed
     parameters
       RequestId identifier
       MonotonicTime timestamp

   experimental type DirectUDPMessage extends object
     properties
       binary data
       # Null for connected mode.
       optional string remoteAddr
       # Null for connected mode.
       # Expected to be unsigned integer.
       optional integer remotePort

   # Fired when message is sent to udp direct socket stream.
   experimental event directUDPSocketChunkSent
     parameters
       RequestId identifier
       DirectUDPMessage message
       MonotonicTime timestamp

   # Fired when message is received from udp direct socket stream.
   experimental event directUDPSocketChunkReceived
     parameters
       RequestId identifier
       DirectUDPMessage message
       MonotonicTime timestamp

   experimental type PrivateNetworkRequestPolicy extends string
     enum
       Allow
       BlockFromInsecureToMorePrivate
       WarnFromInsecureToMorePrivate
       PreflightBlock
       PreflightWarn
       PermissionBlock
       PermissionWarn

   experimental type IPAddressSpace extends string
     enum
       Local
       Private
       Public
       Unknown

   experimental type ConnectTiming extends object
     properties
       # Timing's requestTime is a baseline in seconds, while the other numbers are ticks in
       # milliseconds relatively to this requestTime. Matches ResourceTiming's requestTime for
       # the same request (but not for redirected requests).
       number requestTime

   experimental type ClientSecurityState extends object
     properties
       boolean initiatorIsSecureContext
       IPAddressSpace initiatorIPAddressSpace
       PrivateNetworkRequestPolicy privateNetworkRequestPolicy

   # Fired when additional information about a requestWillBeSent event is available from the
   # network stack. Not every requestWillBeSent event will have an additional
   # requestWillBeSentExtraInfo fired for it, and there is no guarantee whether requestWillBeSent
   # or requestWillBeSentExtraInfo will be fired first for the same request.
   experimental event requestWillBeSentExtraInfo
     parameters
       # Request identifier. Used to match this information to an existing requestWillBeSent event.
       RequestId requestId
       # A list of cookies potentially associated to the requested URL. This includes both cookies sent with
       # the request and the ones not sent; the latter are distinguished by having blockedReasons field set.
       array of AssociatedCookie associatedCookies
       # Raw request headers as they will be sent over the wire.
       Headers headers
       # Connection timing information for the request.
       experimental ConnectTiming connectTiming
       # The client security state set for the request.
       optional ClientSecurityState clientSecurityState
       # Whether the site has partitioned cookies stored in a partition different than the current one.
       optional boolean siteHasCookieInOtherPartition

   # Fired when additional information about a responseReceived event is available from the network
   # stack. Not every responseReceived event will have an additional responseReceivedExtraInfo for
   # it, and responseReceivedExtraInfo may be fired before or after responseReceived.
   experimental event responseReceivedExtraInfo
     parameters
       # Request identifier. Used to match this information to another responseReceived event.
       RequestId requestId
       # A list of cookies which were not stored from the response along with the corresponding
       # reasons for blocking. The cookies here may not be valid due to syntax errors, which
       # are represented by the invalid cookie line string instead of a proper cookie.
       array of BlockedSetCookieWithReason blockedCookies
       # Raw response headers as they were received over the wire.
       # Duplicate headers in the response are represented as a single key with their values
       # concatentated using `\n` as the separator.
       # See also `headersText` that contains verbatim text for HTTP/1.*.
       Headers headers
       # The IP address space of the resource. The address space can only be determined once the transport
       # established the connection, so we can't send it in `requestWillBeSentExtraInfo`.
       IPAddressSpace resourceIPAddressSpace
       # The status code of the response. This is useful in cases the request failed and no responseReceived
       # event is triggered, which is the case for, e.g., CORS errors. This is also the correct status code
       # for cached requests, where the status in responseReceived is a 200 and this will be 304.
       integer statusCode
       # Raw response header text as it was received over the wire. The raw text may not always be
       # available, such as in the case of HTTP/2 or QUIC.
       optional string headersText
       # The cookie partition key that will be used to store partitioned cookies set in this response.
       # Only sent when partitioned cookies are enabled.
       experimental optional CookiePartitionKey cookiePartitionKey
       # True if partitioned cookies are enabled, but the partition key is not serializable to string.
       optional boolean cookiePartitionKeyOpaque
       # A list of cookies which should have been blocked by 3PCD but are exempted and stored from
       # the response with the corresponding reason.
       optional array of ExemptedSetCookieWithReason exemptedCookies

   # Fired when 103 Early Hints headers is received in addition to the common response.
   # Not every responseReceived event will have an responseReceivedEarlyHints fired.
   # Only one responseReceivedEarlyHints may be fired for eached responseReceived event.
   experimental event responseReceivedEarlyHints
     parameters
       # Request identifier. Used to match this information to another responseReceived event.
       RequestId requestId
       # Raw response headers as they were received over the wire.
       # Duplicate headers in the response are represented as a single key with their values
       # concatentated using `\n` as the separator.
       # See also `headersText` that contains verbatim text for HTTP/1.*.
       Headers headers

   # Fired exactly once for each Trust Token operation. Depending on
   # the type of the operation and whether the operation succeeded or
   # failed, the event is fired before the corresponding request was sent
   # or after the response was received.
   experimental event trustTokenOperationDone
     parameters
       # Detailed success or error status of the operation.
       # 'AlreadyExists' also signifies a successful operation, as the result
       # of the operation already exists und thus, the operation was abort
       # preemptively (e.g. a cache hit).
       enum status
         Ok
         InvalidArgument
         MissingIssuerKeys
         FailedPrecondition
         ResourceExhausted
         AlreadyExists
         ResourceLimited
         Unauthorized
         BadResponse
         InternalError
         UnknownError
         FulfilledLocally
         SiteIssuerLimit
       TrustTokenOperationType type
       RequestId requestId
       # Top level origin. The context in which the operation was attempted.
       optional string topLevelOrigin
       # Origin of the issuer in case of a "Issuance" or "Redemption" operation.
       optional string issuerOrigin
       # The number of obtained Trust Tokens on a successful "Issuance" operation.
       optional integer issuedTokenCount

   # Fired once security policy has been updated.
   experimental event policyUpdated

   # Fired once when parsing the .wbn file has succeeded.
   # The event contains the information about the web bundle contents.
   experimental event subresourceWebBundleMetadataReceived
     parameters
       # Request identifier. Used to match this information to another event.
       RequestId requestId
       # A list of URLs of resources in the subresource Web Bundle.
       array of string urls

   # Fired once when parsing the .wbn file has failed.
   experimental event subresourceWebBundleMetadataError
     parameters
       # Request identifier. Used to match this information to another event.
       RequestId requestId
       # Error message
       string errorMessage

   # Fired when handling requests for resources within a .wbn file.
   # Note: this will only be fired for resources that are requested by the webpage.
   experimental event subresourceWebBundleInnerResponseParsed
     parameters
       # Request identifier of the subresource request
       RequestId innerRequestId
       # URL of the subresource resource.
       string innerRequestURL
       # Bundle request identifier. Used to match this information to another event.
       # This made be absent in case when the instrumentation was enabled only
       # after webbundle was parsed.
       optional RequestId bundleRequestId

   # Fired when request for resources within a .wbn file failed.
   experimental event subresourceWebBundleInnerResponseError
     parameters
       # Request identifier of the subresource request
       RequestId innerRequestId
       # URL of the subresource resource.
       string innerRequestURL
       # Error message
       string errorMessage
       # Bundle request identifier. Used to match this information to another event.
       # This made be absent in case when the instrumentation was enabled only
       # after webbundle was parsed.
       optional RequestId bundleRequestId

   experimental type CrossOriginOpenerPolicyValue extends string
     enum
       SameOrigin
       SameOriginAllowPopups
       RestrictProperties
       UnsafeNone
       SameOriginPlusCoep
       RestrictPropertiesPlusCoep
       NoopenerAllowPopups

   experimental type CrossOriginOpenerPolicyStatus extends object
     properties
       CrossOriginOpenerPolicyValue value
       CrossOriginOpenerPolicyValue reportOnlyValue
       optional string reportingEndpoint
       optional string reportOnlyReportingEndpoint

   experimental type CrossOriginEmbedderPolicyValue extends string
     enum
       None
       Credentialless
       RequireCorp

   experimental type CrossOriginEmbedderPolicyStatus extends object
     properties
       CrossOriginEmbedderPolicyValue value
       CrossOriginEmbedderPolicyValue reportOnlyValue
       optional string reportingEndpoint
       optional string reportOnlyReportingEndpoint

   experimental type ContentSecurityPolicySource extends string
     enum
       HTTP
       Meta

   experimental type ContentSecurityPolicyStatus extends object
     properties
       string effectiveDirectives
       boolean isEnforced
       ContentSecurityPolicySource source

   experimental type SecurityIsolationStatus extends object
     properties
       optional CrossOriginOpenerPolicyStatus coop
       optional CrossOriginEmbedderPolicyStatus coep
       optional array of ContentSecurityPolicyStatus csp

   # Returns information about the COEP/COOP isolation status.
   experimental command getSecurityIsolationStatus
     parameters
       # If no frameId is provided, the status of the target is provided.
       optional Page.FrameId frameId
     returns
       SecurityIsolationStatus status

   # Enables tracking for the Reporting API, events generated by the Reporting API will now be delivered to the client.
   # Enabling triggers 'reportingApiReportAdded' for all existing reports.
   experimental command enableReportingApi
     parameters
       # Whether to enable or disable events for the Reporting API
       boolean enable

   # The status of a Reporting API report.
   experimental type ReportStatus extends string
     enum
       # Report has been queued and no attempt has been made to deliver it yet,
       # or attempted previous upload failed (impermanently).
       Queued
       # There is an ongoing attempt to upload this report.
       Pending
       # Deletion of this report was requested while it was pending, so it will
       # be removed after possibly outstanding upload attempts complete (successful
       # or not).
       MarkedForRemoval
       # Successfully uploaded and MarkedForRemoval.
       Success

   experimental type ReportId extends string

   # An object representing a report generated by the Reporting API.
   experimental type ReportingApiReport extends object
     properties
       ReportId id
       # The URL of the document that triggered the report.
       string initiatorUrl
       # The name of the endpoint group that should be used to deliver the report.
       string destination
       # The type of the report (specifies the set of data that is contained in the report body).
       string type
       # When the report was generated.
       Network.TimeSinceEpoch timestamp
       # How many uploads deep the related request was.
       integer depth
       # The number of delivery attempts made so far, not including an active attempt.
       integer completedAttempts
       object body
       ReportStatus status

   # Is sent whenever a new report is added.
   # And after 'enableReportingApi' for all existing reports.
   experimental event reportingApiReportAdded
     parameters
       ReportingApiReport report

   experimental event reportingApiReportUpdated
     parameters
       ReportingApiReport report

   experimental type ReportingApiEndpoint extends object
     properties
       # The URL of the endpoint to which reports may be delivered.
       string url
       # Name of the endpoint group.
       string groupName

   experimental event reportingApiEndpointsChangedForOrigin
     parameters
       # Origin of the document(s) which configured the endpoints.
       string origin
       array of ReportingApiEndpoint endpoints

   # An object providing the result of a network resource load.
   experimental type LoadNetworkResourcePageResult extends object
     properties
       boolean success
       # Optional values used for error reporting.
       optional number netError
       optional string netErrorName
       optional number httpStatusCode
       # If successful, one of the following two fields holds the result.
       optional IO.StreamHandle stream
       # Response headers.
       optional Network.Headers headers

   # An options object that may be extended later to better support CORS,
   # CORB and streaming.
   experimental type LoadNetworkResourceOptions extends object
     properties
       boolean disableCache
       boolean includeCredentials

   # Fetches the resource and returns the content.
   experimental command loadNetworkResource
     parameters
       # Frame id to get the resource for. Mandatory for frame targets, and
       # should be omitted for worker targets.
       optional Page.FrameId frameId
       # URL of the resource to get content for.
       string url
       # Options for the request.
       LoadNetworkResourceOptions options
     returns
       LoadNetworkResourcePageResult resource

   # Sets Controls for third-party cookie access
   # Page reload is required before the new cookie behavior will be observed
   experimental command setCookieControls
     parameters
       # Whether 3pc restriction is enabled.
       boolean enableThirdPartyCookieRestriction

       # Whether 3pc grace period exception should be enabled; false by default.
       boolean disableThirdPartyCookieMetadata

       # Whether 3pc heuristics exceptions should be enabled; false by default.
       boolean disableThirdPartyCookieHeuristics

 # This domain provides various functionality related to drawing atop the inspected page.
 experimental domain Overlay
   depends on DOM
   depends on Page
   depends on Runtime

   # Configuration data for drawing the source order of an elements children.
   type SourceOrderConfig extends object
     properties
       # the color to outline the given element in.
       DOM.RGBA parentOutlineColor
       # the color to outline the child elements in.
       DOM.RGBA childOutlineColor

   # Configuration data for the highlighting of Grid elements.
   type GridHighlightConfig extends object
     properties
       # Whether the extension lines from grid cells to the rulers should be shown (default: false).
       optional boolean showGridExtensionLines
       # Show Positive line number labels (default: false).
       optional boolean showPositiveLineNumbers
       # Show Negative line number labels (default: false).
       optional boolean showNegativeLineNumbers
       # Show area name labels (default: false).
       optional boolean showAreaNames
       # Show line name labels (default: false).
       optional boolean showLineNames
       # Show track size labels (default: false).
       optional boolean showTrackSizes
       # The grid container border highlight color (default: transparent).
       optional DOM.RGBA gridBorderColor
       # The cell border color (default: transparent). Deprecated, please use rowLineColor and columnLineColor instead.
       deprecated optional DOM.RGBA cellBorderColor
       # The row line color (default: transparent).
       optional DOM.RGBA rowLineColor
       # The column line color (default: transparent).
       optional DOM.RGBA columnLineColor
       # Whether the grid border is dashed (default: false).
       optional boolean gridBorderDash
       # Whether the cell border is dashed (default: false). Deprecated, please us rowLineDash and columnLineDash instead.
       deprecated optional boolean cellBorderDash
       # Whether row lines are dashed (default: false).
       optional boolean rowLineDash
       # Whether column lines are dashed (default: false).
       optional boolean columnLineDash
       # The row gap highlight fill color (default: transparent).
       optional DOM.RGBA rowGapColor
       # The row gap hatching fill color (default: transparent).
       optional DOM.RGBA rowHatchColor
       # The column gap highlight fill color (default: transparent).
       optional DOM.RGBA columnGapColor
       # The column gap hatching fill color (default: transparent).
       optional DOM.RGBA columnHatchColor
       # The named grid areas border color (Default: transparent).
       optional DOM.RGBA areaBorderColor
       # The grid container background color (Default: transparent).
       optional DOM.RGBA gridBackgroundColor

   # Configuration data for the highlighting of Flex container elements.
   type FlexContainerHighlightConfig extends object
     properties
       # The style of the container border
       optional LineStyle containerBorder
       # The style of the separator between lines
       optional LineStyle lineSeparator
       # The style of the separator between items
       optional LineStyle itemSeparator
       # Style of content-distribution space on the main axis (justify-content).
       optional BoxStyle mainDistributedSpace
       # Style of content-distribution space on the cross axis (align-content).
       optional BoxStyle crossDistributedSpace
       # Style of empty space caused by row gaps (gap/row-gap).
       optional BoxStyle rowGapSpace
       # Style of empty space caused by columns gaps (gap/column-gap).
       optional BoxStyle columnGapSpace
       # Style of the self-alignment line (align-items).
       optional LineStyle crossAlignment

   # Configuration data for the highlighting of Flex item elements.
   type FlexItemHighlightConfig extends object
     properties
       # Style of the box representing the item's base size
       optional BoxStyle baseSizeBox
       # Style of the border around the box representing the item's base size
       optional LineStyle baseSizeBorder
       # Style of the arrow representing if the item grew or shrank
       optional LineStyle flexibilityArrow

   # Style information for drawing a line.
   type LineStyle extends object
     properties
       # The color of the line (default: transparent)
       optional DOM.RGBA color
       # The line pattern (default: solid)
       optional enum pattern
         dashed
         dotted

   # Style information for drawing a box.
   type BoxStyle extends object
     properties
       # The background color for the box (default: transparent)
       optional DOM.RGBA fillColor
       # The hatching color for the box (default: transparent)
       optional DOM.RGBA hatchColor

   type ContrastAlgorithm extends string
     enum
       aa
       aaa
       apca

   # Configuration data for the highlighting of page elements.
   type HighlightConfig extends object
     properties
       # Whether the node info tooltip should be shown (default: false).
       optional boolean showInfo
       # Whether the node styles in the tooltip (default: false).
       optional boolean showStyles
       # Whether the rulers should be shown (default: false).
       optional boolean showRulers
       # Whether the a11y info should be shown (default: true).
       optional boolean showAccessibilityInfo
       # Whether the extension lines from node to the rulers should be shown (default: false).
       optional boolean showExtensionLines
       # The content box highlight fill color (default: transparent).
       optional DOM.RGBA contentColor
       # The padding highlight fill color (default: transparent).
       optional DOM.RGBA paddingColor
       # The border highlight fill color (default: transparent).
       optional DOM.RGBA borderColor
       # The margin highlight fill color (default: transparent).
       optional DOM.RGBA marginColor
       # The event target element highlight fill color (default: transparent).
       optional DOM.RGBA eventTargetColor
       # The shape outside fill color (default: transparent).
       optional DOM.RGBA shapeColor
       # The shape margin fill color (default: transparent).
       optional DOM.RGBA shapeMarginColor
       # The grid layout color (default: transparent).
       optional DOM.RGBA cssGridColor
       # The color format used to format color styles (default: hex).
       optional ColorFormat colorFormat
       # The grid layout highlight configuration (default: all transparent).
       optional GridHighlightConfig gridHighlightConfig
       # The flex container highlight configuration (default: all transparent).
       optional FlexContainerHighlightConfig flexContainerHighlightConfig
       # The flex item highlight configuration (default: all transparent).
       optional FlexItemHighlightConfig flexItemHighlightConfig
       # The contrast algorithm to use for the contrast ratio (default: aa).
       optional ContrastAlgorithm contrastAlgorithm
       # The container query container highlight configuration (default: all transparent).
       optional ContainerQueryContainerHighlightConfig containerQueryContainerHighlightConfig

   type ColorFormat extends string
     enum
       rgb
       hsl
       hwb
       hex

   # Configurations for Persistent Grid Highlight
   type GridNodeHighlightConfig extends object
     properties
       # A descriptor for the highlight appearance.
       GridHighlightConfig gridHighlightConfig
       # Identifier of the node to highlight.
       DOM.NodeId nodeId

   type FlexNodeHighlightConfig extends object
     properties
       # A descriptor for the highlight appearance of flex containers.
       FlexContainerHighlightConfig flexContainerHighlightConfig
       # Identifier of the node to highlight.
       DOM.NodeId nodeId

   type ScrollSnapContainerHighlightConfig extends object
     properties
       # The style of the snapport border (default: transparent)
       optional LineStyle snapportBorder
       # The style of the snap area border (default: transparent)
       optional LineStyle snapAreaBorder
       # The margin highlight fill color (default: transparent).
       optional DOM.RGBA scrollMarginColor
       # The padding highlight fill color (default: transparent).
       optional DOM.RGBA scrollPaddingColor

   type ScrollSnapHighlightConfig extends object
     properties
       # A descriptor for the highlight appearance of scroll snap containers.
       ScrollSnapContainerHighlightConfig scrollSnapContainerHighlightConfig
       # Identifier of the node to highlight.
       DOM.NodeId nodeId

   # Configuration for dual screen hinge
   type HingeConfig extends object
     properties
       # A rectangle represent hinge
       DOM.Rect rect
       # The content box highlight fill color (default: a dark color).
       optional DOM.RGBA contentColor
       # The content box highlight outline color (default: transparent).
       optional DOM.RGBA outlineColor

   # Configuration for Window Controls Overlay
   type WindowControlsOverlayConfig extends object
     properties
       # Whether the title bar CSS should be shown when emulating the Window Controls Overlay.
       boolean showCSS
       # Selected platforms to show the overlay.
       string selectedPlatform
       # The theme color defined in app manifest.
       string themeColor

   type ContainerQueryHighlightConfig extends object
     properties
       # A descriptor for the highlight appearance of container query containers.
       ContainerQueryContainerHighlightConfig containerQueryContainerHighlightConfig
       # Identifier of the container node to highlight.
       DOM.NodeId nodeId

   type ContainerQueryContainerHighlightConfig extends object
     properties
       # The style of the container border.
       optional LineStyle containerBorder
       # The style of the descendants' borders.
       optional LineStyle descendantBorder

   type IsolatedElementHighlightConfig extends object
     properties
       # A descriptor for the highlight appearance of an element in isolation mode.
       IsolationModeHighlightConfig isolationModeHighlightConfig
       # Identifier of the isolated element to highlight.
       DOM.NodeId nodeId

   type IsolationModeHighlightConfig extends object
     properties
       # The fill color of the resizers (default: transparent).
       optional DOM.RGBA resizerColor
       # The fill color for resizer handles (default: transparent).
       optional DOM.RGBA resizerHandleColor
       # The fill color for the mask covering non-isolated elements (default: transparent).
       optional DOM.RGBA maskColor

   type InspectMode extends string
     enum
       searchForNode
       searchForUAShadowDOM
       captureAreaScreenshot
       showDistances
       none

   # Disables domain notifications.
   command disable

   # Enables domain notifications.
   command enable

   # For testing.
   command getHighlightObjectForTest
     parameters
       # Id of the node to get highlight object for.
       DOM.NodeId nodeId
       # Whether to include distance info.
       optional boolean includeDistance
       # Whether to include style info.
       optional boolean includeStyle
       # The color format to get config with (default: hex).
       optional ColorFormat colorFormat
       # Whether to show accessibility info (default: true).
       optional boolean showAccessibilityInfo
     returns
       # Highlight data for the node.
       object highlight

   # For Persistent Grid testing.
   command getGridHighlightObjectsForTest
     parameters
       # Ids of the node to get highlight object for.
       array of DOM.NodeId nodeIds
     returns
       # Grid Highlight data for the node ids provided.
       object highlights

   # For Source Order Viewer testing.
   command getSourceOrderHighlightObjectForTest
     parameters
       # Id of the node to highlight.
       DOM.NodeId nodeId
     returns
       # Source order highlight data for the node id provided.
       object highlight

   # Hides any highlight.
   command hideHighlight

   # Highlights owner element of the frame with given id.
   # Deprecated: Doesn't work reliably and cannot be fixed due to process
   # separation (the owner node might be in a different process). Determine
   # the owner node in the client and use highlightNode.
   deprecated command highlightFrame
     parameters
       # Identifier of the frame to highlight.
       Page.FrameId frameId
       # The content box highlight fill color (default: transparent).
       optional DOM.RGBA contentColor
       # The content box highlight outline color (default: transparent).
       optional DOM.RGBA contentOutlineColor

   # Highlights DOM node with given id or with the given JavaScript object wrapper. Either nodeId or
   # objectId must be specified.
   command highlightNode
     parameters
       # A descriptor for the highlight appearance.
       HighlightConfig highlightConfig
       # Identifier of the node to highlight.
       optional DOM.NodeId nodeId
       # Identifier of the backend node to highlight.
       optional DOM.BackendNodeId backendNodeId
       # JavaScript object id of the node to be highlighted.
       optional Runtime.RemoteObjectId objectId
       # Selectors to highlight relevant nodes.
       optional string selector

   # Highlights given quad. Coordinates are absolute with respect to the main frame viewport.
   command highlightQuad
     parameters
       # Quad to highlight
       DOM.Quad quad
       # The highlight fill color (default: transparent).
       optional DOM.RGBA color
       # The highlight outline color (default: transparent).
       optional DOM.RGBA outlineColor

   # Highlights given rectangle. Coordinates are absolute with respect to the main frame viewport.
   command highlightRect
     parameters
       # X coordinate
       integer x
       # Y coordinate
       integer y
       # Rectangle width
       integer width
       # Rectangle height
       integer height
       # The highlight fill color (default: transparent).
       optional DOM.RGBA color
       # The highlight outline color (default: transparent).
       optional DOM.RGBA outlineColor

   # Highlights the source order of the children of the DOM node with given id or with the given
   # JavaScript object wrapper. Either nodeId or objectId must be specified.
   command highlightSourceOrder
     parameters
       # A descriptor for the appearance of the overlay drawing.
       SourceOrderConfig sourceOrderConfig
       # Identifier of the node to highlight.
       optional DOM.NodeId nodeId
       # Identifier of the backend node to highlight.
       optional DOM.BackendNodeId backendNodeId
       # JavaScript object id of the node to be highlighted.
       optional Runtime.RemoteObjectId objectId

   # Enters the 'inspect' mode. In this mode, elements that user is hovering over are highlighted.
   # Backend then generates 'inspectNodeRequested' event upon element selection.
   command setInspectMode
     parameters
       # Set an inspection mode.
       InspectMode mode
       # A descriptor for the highlight appearance of hovered-over nodes. May be omitted if `enabled
       # == false`.
       optional HighlightConfig highlightConfig

   # Highlights owner element of all frames detected to be ads.
   command setShowAdHighlights
     parameters
       # True for showing ad highlights
       boolean show

   command setPausedInDebuggerMessage
     parameters
       # The message to display, also triggers resume and step over controls.
       optional string message

   # Requests that backend shows debug borders on layers
   command setShowDebugBorders
     parameters
       # True for showing debug borders
       boolean show

   # Requests that backend shows the FPS counter
   command setShowFPSCounter
     parameters
       # True for showing the FPS counter
       boolean show

   # Highlight multiple elements with the CSS Grid overlay.
   command setShowGridOverlays
     parameters
       # An array of node identifiers and descriptors for the highlight appearance.
       array of GridNodeHighlightConfig gridNodeHighlightConfigs

   command setShowFlexOverlays
     parameters
       # An array of node identifiers and descriptors for the highlight appearance.
       array of FlexNodeHighlightConfig flexNodeHighlightConfigs

   command setShowScrollSnapOverlays
     parameters
       # An array of node identifiers and descriptors for the highlight appearance.
       array of ScrollSnapHighlightConfig scrollSnapHighlightConfigs

   command setShowContainerQueryOverlays
     parameters
       # An array of node identifiers and descriptors for the highlight appearance.
       array of ContainerQueryHighlightConfig containerQueryHighlightConfigs

   # Requests that backend shows paint rectangles
   command setShowPaintRects
     parameters
       # True for showing paint rectangles
       boolean result

   # Requests that backend shows layout shift regions
   command setShowLayoutShiftRegions
     parameters
       # True for showing layout shift regions
       boolean result

   # Requests that backend shows scroll bottleneck rects
   command setShowScrollBottleneckRects
     parameters
       # True for showing scroll bottleneck rects
       boolean show

   # Deprecated, no longer has any effect.
   deprecated command setShowHitTestBorders
     parameters
       # True for showing hit-test borders
       boolean show

   # Deprecated, no longer has any effect.
   deprecated command setShowWebVitals
     parameters
       boolean show

   # Paints viewport size upon main frame resize.
   command setShowViewportSizeOnResize
     parameters
       # Whether to paint size or not.
       boolean show

   # Add a dual screen device hinge
   command setShowHinge
     parameters
       # hinge data, null means hideHinge
       optional HingeConfig hingeConfig

   # Show elements in isolation mode with overlays.
   command setShowIsolatedElements
     parameters
       # An array of node identifiers and descriptors for the highlight appearance.
       array of IsolatedElementHighlightConfig isolatedElementHighlightConfigs

   # Show Window Controls Overlay for PWA
   command setShowWindowControlsOverlay
     parameters
       # Window Controls Overlay data, null means hide Window Controls Overlay
       optional WindowControlsOverlayConfig windowControlsOverlayConfig

   # Fired when the node should be inspected. This happens after call to `setInspectMode` or when
   # user manually inspects an element.
   event inspectNodeRequested
     parameters
       # Id of the node to inspect.
       DOM.BackendNodeId backendNodeId

   # Fired when the node should be highlighted. This happens after call to `setInspectMode`.
   event nodeHighlightRequested
     parameters
       DOM.NodeId nodeId

   # Fired when user asks to capture screenshot of some area on the page.
   event screenshotRequested
     parameters
       # Viewport to capture, in device independent pixels (dip).
       Page.Viewport viewport

   # Fired when user cancels the inspect mode.
   event inspectModeCanceled

 # Actions and events related to the inspected page belong to the page domain.
 domain Page
   depends on Debugger
   depends on DOM
   depends on IO
   depends on Network
   depends on Runtime

   # Unique frame identifier.
   type FrameId extends string

   # Indicates whether a frame has been identified as an ad.
   experimental type AdFrameType extends string
     enum
       none
       # This frame is a subframe of an ad frame.
       child
       # This frame is the root of an ad frame.
       root

   experimental type AdFrameExplanation extends string
     enum
       ParentIsAd
       CreatedByAdScript
       MatchedBlockingRule

   # Indicates whether a frame has been identified as an ad and why.
   experimental type AdFrameStatus extends object
     properties
       AdFrameType adFrameType
       optional array of AdFrameExplanation explanations

   # Identifies the bottom-most script which caused the frame to be labelled
   # as an ad.
   experimental type AdScriptId extends object
     properties
       # Script Id of the bottom-most script which caused the frame to be labelled
       # as an ad.
       Runtime.ScriptId scriptId
       # Id of adScriptId's debugger.
       Runtime.UniqueDebuggerId debuggerId

   # Indicates whether the frame is a secure context and why it is the case.
   experimental type SecureContextType extends string
     enum
       # The origin is a secure context.
       Secure
       # The host is localhost and hence is considered secure.
       SecureLocalhost
       # The origin has an insecure scheme and is not localhost.
       InsecureScheme
       # One of the ancestor frames is not a secure context.
       InsecureAncestor

   # Indicates whether the frame is cross-origin isolated and why it is the case.
   experimental type CrossOriginIsolatedContextType extends string
     enum
       # The origin is cross-origin isolated.
       Isolated
       # The origin is not cross-origin isolated.
       NotIsolated
       # The cross-origin isolation feature is disabled.
       NotIsolatedFeatureDisabled

   experimental type GatedAPIFeatures extends string
     enum
       SharedArrayBuffers
       SharedArrayBuffersTransferAllowed
       PerformanceMeasureMemory
       PerformanceProfile

   # All Permissions Policy features. This enum should match the one defined
   # in services/network/public/cpp/permissions_policy/permissions_policy_features.json5.
   # LINT.IfChange(PermissionsPolicyFeature)
   experimental type PermissionsPolicyFeature extends string
     enum
       accelerometer
       all-screens-capture
       ambient-light-sensor
       attribution-reporting
       autoplay
       bluetooth
       browsing-topics
       camera
       captured-surface-control
       ch-dpr
       ch-device-memory
       ch-downlink
       ch-ect
       ch-prefers-color-scheme
       ch-prefers-reduced-motion
       ch-prefers-reduced-transparency
       ch-rtt
       ch-save-data
       ch-ua
       ch-ua-arch
       ch-ua-bitness
       ch-ua-high-entropy-values
       ch-ua-platform
       ch-ua-model
       ch-ua-mobile
       ch-ua-form-factors
       ch-ua-full-version
       ch-ua-full-version-list
       ch-ua-platform-version
       ch-ua-wow64
       ch-viewport-height
       ch-viewport-width
       ch-width
       clipboard-read
       clipboard-write
       compute-pressure
       controlled-frame
       cross-origin-isolated
       deferred-fetch
       deferred-fetch-minimal
       device-attributes
       digital-credentials-get
       direct-sockets
       direct-sockets-private
       display-capture
       document-domain
       encrypted-media
       execution-while-out-of-viewport
       execution-while-not-rendered
       fenced-unpartitioned-storage-read
       focus-without-user-activation
       fullscreen
       frobulate
       gamepad
       geolocation
       gyroscope
       hid
       identity-credentials-get
       idle-detection
       interest-cohort
       join-ad-interest-group
       keyboard-map
       language-detector
       local-fonts
       local-network-access
       magnetometer
       media-playback-while-not-visible
       microphone
       midi
       on-device-speech-recognition
       otp-credentials
       payment
       picture-in-picture
       popins
       private-aggregation
       private-state-token-issuance
       private-state-token-redemption
       publickey-credentials-create
       publickey-credentials-get
       record-ad-auction-events
       rewriter
       run-ad-auction
       screen-wake-lock
       serial
       shared-autofill
       shared-storage
       shared-storage-select-url
       smart-card
       speaker-selection
       storage-access
       sub-apps
       summarizer
       sync-xhr
       translator
       unload
       usb
       usb-unrestricted
       vertical-scroll
       web-app-installation
       web-printing
       web-share
       window-management
       writer
       xr-spatial-tracking
   # LINT.ThenChange(//services/network/public/cpp/permissions_policy/permissions_policy_features.json5:PermissionsPolicy)

   # Reason for a permissions policy feature to be disabled.
   experimental type PermissionsPolicyBlockReason extends string
     enum
       # Declaration in HTTP header.
       Header
       # Declaration in iframe attribute.
       IframeAttribute
       # Inside fenced frame.
       InFencedFrameTree
       # Inside an Isolated Application.
       InIsolatedApp

   experimental type PermissionsPolicyBlockLocator extends object
     properties
       FrameId frameId
       PermissionsPolicyBlockReason blockReason

   experimental type PermissionsPolicyFeatureState extends object
     properties
       PermissionsPolicyFeature feature
       boolean allowed
       optional PermissionsPolicyBlockLocator locator

   # Origin Trial(https://www.chromium.org/blink/origin-trials) support.
   # Status for an Origin Trial token.
   experimental type OriginTrialTokenStatus extends string
     enum
       Success
       NotSupported
       Insecure
       Expired
       WrongOrigin
       InvalidSignature
       Malformed
       WrongVersion
       FeatureDisabled
       TokenDisabled
       FeatureDisabledForUser
       UnknownTrial

   # Status for an Origin Trial.
   experimental type OriginTrialStatus extends string
     enum
       Enabled
       ValidTokenNotProvided
       OSNotSupported
       TrialNotAllowed

   experimental type OriginTrialUsageRestriction extends string
     enum
       None
       Subset

   experimental type OriginTrialToken extends object
     properties
       string origin
       boolean matchSubDomains
       string trialName
       Network.TimeSinceEpoch expiryTime
       boolean isThirdParty
       OriginTrialUsageRestriction usageRestriction

   experimental type OriginTrialTokenWithStatus extends object
     properties
       string rawTokenText
       # `parsedToken` is present only when the token is extractable and
       # parsable.
       optional OriginTrialToken parsedToken
       OriginTrialTokenStatus status

   experimental type OriginTrial extends object
     properties
       string trialName
       OriginTrialStatus status
       array of OriginTrialTokenWithStatus tokensWithStatus

   # Additional information about the frame document's security origin.
   experimental type SecurityOriginDetails extends object
     properties
       # Indicates whether the frame document's security origin is one
       # of the local hostnames (e.g. "localhost") or IP addresses (IPv4
       # 127.0.0.0/8 or IPv6 ::1).
       boolean isLocalhost

   # Information about the Frame on the page.
   type Frame extends object
     properties
       # Frame unique identifier.
       FrameId id
       # Parent frame identifier.
       optional FrameId parentId
       # Identifier of the loader associated with this frame.
       Network.LoaderId loaderId
       # Frame's name as specified in the tag.
       optional string name
       # Frame document's URL without fragment.
       string url
       # Frame document's URL fragment including the '#'.
       experimental optional string urlFragment
       # Frame document's registered domain, taking the public suffixes list into account.
       # Extracted from the Frame's url.
       # Example URLs: http://www.google.com/file.html -> "google.com"
       #               http://a.b.co.uk/file.html      -> "b.co.uk"
       experimental string domainAndRegistry
       # Frame document's security origin.
       string securityOrigin
       # Additional details about the frame document's security origin.
       experimental optional SecurityOriginDetails securityOriginDetails
       # Frame document's mimeType as determined by the browser.
       string mimeType
       # If the frame failed to load, this contains the URL that could not be loaded. Note that unlike url above, this URL may contain a fragment.
       experimental optional string unreachableUrl
       # Indicates whether this frame was tagged as an ad and why.
       experimental optional AdFrameStatus adFrameStatus
       # Indicates whether the main document is a secure context and explains why that is the case.
       experimental SecureContextType secureContextType
       # Indicates whether this is a cross origin isolated context.
       experimental CrossOriginIsolatedContextType crossOriginIsolatedContextType
       # Indicated which gated APIs / features are available.
       experimental array of GatedAPIFeatures gatedAPIFeatures

   # Information about the Resource on the page.
   experimental type FrameResource extends object
     properties
       # Resource URL.
       string url
       # Type of this resource.
       Network.ResourceType type
       # Resource mimeType as determined by the browser.
       string mimeType
       # last-modified timestamp as reported by server.
       optional Network.TimeSinceEpoch lastModified
       # Resource content size.
       optional number contentSize
       # True if the resource failed to load.
       optional boolean failed
       # True if the resource was canceled during loading.
       optional boolean canceled

   # Information about the Frame hierarchy along with their cached resources.
   experimental type FrameResourceTree extends object
     properties
       # Frame information for this tree item.
       Frame frame
       # Child frames.
       optional array of FrameResourceTree childFrames
       # Information about frame resources.
       array of FrameResource resources

   # Information about the Frame hierarchy.
   type FrameTree extends object
     properties
       # Frame information for this tree item.
       Frame frame
       # Child frames.
       optional array of FrameTree childFrames

   # Unique script identifier.
   type ScriptIdentifier extends string

   # Transition type.
   type TransitionType extends string
     enum
       link
       typed
       address_bar
       auto_bookmark
       auto_subframe
       manual_subframe
       generated
       auto_toplevel
       form_submit
       reload
       keyword
       keyword_generated
       other

   # Navigation history entry.
   type NavigationEntry extends object
     properties
       # Unique id of the navigation history entry.
       integer id
       # URL of the navigation history entry.
       string url
       # URL that the user typed in the url bar.
       string userTypedURL
       # Title of the navigation history entry.
       string title
       # Transition type.
       TransitionType transitionType

   # Screencast frame metadata.
   experimental type ScreencastFrameMetadata extends object
     properties
       # Top offset in DIP.
       number offsetTop
       # Page scale factor.
       number pageScaleFactor
       # Device screen width in DIP.
       number deviceWidth
       # Device screen height in DIP.
       number deviceHeight
       # Position of horizontal scroll in CSS pixels.
       number scrollOffsetX
       # Position of vertical scroll in CSS pixels.
       number scrollOffsetY
       # Frame swap timestamp.
       optional Network.TimeSinceEpoch timestamp

   # Javascript dialog type.
   type DialogType extends string
     enum
       alert
       confirm
       prompt
       beforeunload

   # Error while paring app manifest.
   type AppManifestError extends object
     properties
       # Error message.
       string message
       # If critical, this is a non-recoverable parse error.
       integer critical
       # Error line.
       integer line
       # Error column.
       integer column

   # Parsed app manifest properties.
   experimental type AppManifestParsedProperties extends object
     properties
       # Computed scope value
       string scope

   # Layout viewport position and dimensions.
   type LayoutViewport extends object
     properties
       # Horizontal offset relative to the document (CSS pixels).
       integer pageX
       # Vertical offset relative to the document (CSS pixels).
       integer pageY
       # Width (CSS pixels), excludes scrollbar if present.
       integer clientWidth
       # Height (CSS pixels), excludes scrollbar if present.
       integer clientHeight

   # Visual viewport position, dimensions, and scale.
   type VisualViewport extends object
     properties
       # Horizontal offset relative to the layout viewport (CSS pixels).
       number offsetX
       # Vertical offset relative to the layout viewport (CSS pixels).
       number offsetY
       # Horizontal offset relative to the document (CSS pixels).
       number pageX
       # Vertical offset relative to the document (CSS pixels).
       number pageY
       # Width (CSS pixels), excludes scrollbar if present.
       number clientWidth
       # Height (CSS pixels), excludes scrollbar if present.
       number clientHeight
       # Scale relative to the ideal viewport (size at width=device-width).
       number scale
       # Page zoom factor (CSS to device independent pixels ratio).
       optional number zoom

   # Viewport for capturing screenshot.
   type Viewport extends object
     properties
       # X offset in device independent pixels (dip).
       number x
       # Y offset in device independent pixels (dip).
       number y
       # Rectangle width in device independent pixels (dip).
       number width
       # Rectangle height in device independent pixels (dip).
       number height
       # Page scale factor.
       number scale

   # Generic font families collection.
   experimental type FontFamilies extends object
     properties
       # The standard font-family.
       optional string standard
       # The fixed font-family.
       optional string fixed
       # The serif font-family.
       optional string serif
       # The sansSerif font-family.
       optional string sansSerif
       # The cursive font-family.
       optional string cursive
       # The fantasy font-family.
       optional string fantasy
       # The math font-family.
       optional string math

   # Font families collection for a script.
   experimental type ScriptFontFamilies extends object
     properties
       # Name of the script which these font families are defined for.
       string script
       # Generic font families collection for the script.
       FontFamilies fontFamilies

   # Default font sizes.
   experimental type FontSizes extends object
     properties
       # Default standard font size.
       optional integer standard
       # Default fixed font size.
       optional integer fixed

   experimental type ClientNavigationReason extends string
     enum
       anchorClick
       formSubmissionGet
       formSubmissionPost
       httpHeaderRefresh
       initialFrameNavigation
       metaTagRefresh
       other
       pageBlockInterstitial
       reload
       scriptInitiated

   experimental type ClientNavigationDisposition extends string
     enum
       currentTab
       newTab
       newWindow
       download

   experimental type InstallabilityErrorArgument extends object
     properties
       # Argument name (e.g. name:'minimum-icon-size-in-pixels').
       string name
       # Argument value (e.g. value:'64').
       string value

   # The installability error
   experimental type InstallabilityError extends object
     properties
       # The error id (e.g. 'manifest-missing-suitable-icon').
       string errorId
       # The list of error arguments (e.g. {name:'minimum-icon-size-in-pixels', value:'64'}).
       array of InstallabilityErrorArgument errorArguments

   # The referring-policy used for the navigation.
   experimental type ReferrerPolicy extends string
     enum
       noReferrer
       noReferrerWhenDowngrade
       origin
       originWhenCrossOrigin
       sameOrigin
       strictOrigin
       strictOriginWhenCrossOrigin
       unsafeUrl

   # Per-script compilation cache parameters for `Page.produceCompilationCache`
   experimental type CompilationCacheParams extends object
     properties
       # The URL of the script to produce a compilation cache entry for.
       string url
       # A hint to the backend whether eager compilation is recommended.
       # (the actual compilation mode used is upon backend discretion).
       optional boolean eager

   # Deprecated, please use addScriptToEvaluateOnNewDocument instead.
   experimental deprecated command addScriptToEvaluateOnLoad
     parameters
       string scriptSource
     returns
       # Identifier of the added script.
       ScriptIdentifier identifier

   # Evaluates given script in every frame upon creation (before loading frame's scripts).
   command addScriptToEvaluateOnNewDocument
     parameters
       string source
       # If specified, creates an isolated world with the given name and evaluates given script in it.
       # This world name will be used as the ExecutionContextDescription::name when the corresponding
       # event is emitted.
       experimental optional string worldName
       # Specifies whether command line API should be available to the script, defaults
       # to false.
       experimental optional boolean includeCommandLineAPI
       # If true, runs the script immediately on existing execution contexts or worlds.
       # Default: false.
       experimental optional boolean runImmediately
     returns
       # Identifier of the added script.
       ScriptIdentifier identifier

   # Brings page to front (activates tab).
   command bringToFront

   # Capture page screenshot.
   command captureScreenshot
     parameters
       # Image compression format (defaults to png).
       optional enum format
         jpeg
         png
         webp
       # Compression quality from range [0..100] (jpeg only).
       optional integer quality
       # Capture the screenshot of a given region only.
       optional Viewport clip
       # Capture the screenshot from the surface, rather than the view. Defaults to true.
       experimental optional boolean fromSurface
       # Capture the screenshot beyond the viewport. Defaults to false.
       experimental optional boolean captureBeyondViewport
       # Optimize image encoding for speed, not for resulting size (defaults to false)
       experimental optional boolean optimizeForSpeed
     returns
       # Base64-encoded image data.
       binary data

   # Returns a snapshot of the page as a string. For MHTML format, the serialization includes
   # iframes, shadow DOM, external resources, and element-inline styles.
   experimental command captureSnapshot
     parameters
       # Format (defaults to mhtml).
       optional enum format
         mhtml
     returns
       # Serialized page data.
       string data

   # Clears the overridden device metrics.
   experimental deprecated command clearDeviceMetricsOverride
     # Use 'Emulation.clearDeviceMetricsOverride' instead
     redirect Emulation

   # Clears the overridden Device Orientation.
   experimental deprecated command clearDeviceOrientationOverride
     # Use 'DeviceOrientation.clearDeviceOrientationOverride' instead
     redirect DeviceOrientation

   # Clears the overridden Geolocation Position and Error.
   deprecated command clearGeolocationOverride
     # Use 'Emulation.clearGeolocationOverride' instead
     redirect Emulation

   # Creates an isolated world for the given frame.
   command createIsolatedWorld
     parameters
       # Id of the frame in which the isolated world should be created.
       FrameId frameId
       # An optional name which is reported in the Execution Context.
       optional string worldName
       # Whether or not universal access should be granted to the isolated world. This is a powerful
       # option, use with caution.
       optional boolean grantUniveralAccess
     returns
       # Execution context of the isolated world.
       Runtime.ExecutionContextId executionContextId

   # Deletes browser cookie with given name, domain and path.
   experimental deprecated command deleteCookie
     # Use 'Network.deleteCookie' instead
     redirect Network
     parameters
       # Name of the cookie to remove.
       string cookieName
       # URL to match cooke domain and path.
       string url

   # Disables page domain notifications.
   command disable

   # Enables page domain notifications.
   command enable
     parameters
       # If true, the `Page.fileChooserOpened` event will be emitted regardless of the state set by
       # `Page.setInterceptFileChooserDialog` command (default: false).
       experimental optional boolean enableFileChooserOpenedEvent

   # The manifest of a webapp, see
   # https://www.w3.org/TR/appmanifest/#dfn-manifest.
   # Some fields do not appear in the standard since the API is designed to
   # expose more browser internal states.

   experimental type FileFilter extends object
     properties
       optional string name
       optional array of string accepts

   experimental type FileHandler extends object
     properties
       string action
       string name
       optional array of ImageResource icons
       # Mimic a map, name is the key, accepts is the value.
       optional array of FileFilter accepts
       # Won't repeat the enums, using string for easy comparison. Same as the
       # other enums below.
       string launchType

   # The image definition used in both icon and screenshot.
   experimental type ImageResource extends object
     properties
       # The src field in the definition, but changing to url in favor of
       # consistency.
       string url
       optional string sizes
       optional string type

   experimental type LaunchHandler extends object
     properties
       string clientMode

   experimental type ProtocolHandler extends object
     properties
       string protocol
       string url

   experimental type RelatedApplication extends object
     properties
       optional string id
       string url

   experimental type ScopeExtension extends object
     properties
       # Instead of using tuple, this field always returns the serialized string
       # for easy understanding and comparison.
       string origin
       boolean hasOriginWildcard

   experimental type Screenshot extends object
     properties
       ImageResource image
       string formFactor
       optional string label

   experimental type ShareTarget extends object
     properties
       string action
       string method
       string enctype
       # Embed the ShareTargetParams
       optional string title
       optional string text
       optional string url
       optional array of FileFilter files

   experimental type Shortcut extends object
     properties
       string name
       string url

   experimental type WebAppManifest extends object
     properties
       optional string backgroundColor
       # The extra description provided by the manifest.
       optional string description
       optional string dir
       optional string display
       # The overrided display mode controlled by the user.
       optional array of string displayOverrides
       # The handlers to open files.
       optional array of FileHandler fileHandlers
       optional array of ImageResource icons
       optional string id
       optional string lang
       # TODO(crbug.com/1231886): This field is non-standard and part of a Chrome
       # experiment. See:
       # https://github.com/WICG/web-app-launch/blob/main/launch_handler.md
       optional LaunchHandler launchHandler
       optional string name
       optional string orientation
       optional boolean preferRelatedApplications
       # The handlers to open protocols.
       optional array of ProtocolHandler protocolHandlers
       optional array of RelatedApplication relatedApplications
       optional string scope
       # Non-standard, see
       # https://github.com/WICG/manifest-incubations/blob/gh-pages/scope_extensions-explainer.md
       optional array of ScopeExtension scopeExtensions
       # The screenshots used by chromium.
       optional array of Screenshot screenshots
       optional ShareTarget shareTarget
       optional string shortName
       optional array of Shortcut shortcuts
       optional string startUrl
       optional string themeColor

   # Gets the processed manifest for this current document.
   #   This API always waits for the manifest to be loaded.
   #   If manifestId is provided, and it does not match the manifest of the
   #     current document, this API errors out.
   #   If there is not a loaded page, this API errors out immediately.
   command getAppManifest
     parameters
       optional string manifestId
     returns
       # Manifest location.
       string url
       array of AppManifestError errors
       # Manifest content.
       optional string data
       # Parsed manifest properties. Deprecated, use manifest instead.
       experimental deprecated optional AppManifestParsedProperties parsed
       experimental WebAppManifest manifest

   experimental command getInstallabilityErrors
     returns
       array of InstallabilityError installabilityErrors

   # Deprecated because it's not guaranteed that the returned icon is in fact the one used for PWA installation.
   experimental deprecated command getManifestIcons
     returns
       optional binary primaryIcon

   # Returns the unique (PWA) app id.
   # Only returns values if the feature flag 'WebAppEnableManifestId' is enabled
   experimental command getAppId
     returns
       # App id, either from manifest's id attribute or computed from start_url
       optional string appId
       # Recommendation for manifest's id attribute to match current id computed from start_url
       optional string recommendedId

   experimental command getAdScriptAncestryIds
     parameters
       FrameId frameId
     returns
       # The ancestry chain of ad script identifiers leading to this frame's
       # creation, ordered from the most immediate script (in the frame creation
       # stack) to more distant ancestors (that created the immediately preceding
       # script). Only sent if frame is labelled as an ad and ids are available.
       array of AdScriptId adScriptAncestryIds

   # Returns present frame tree structure.
   command getFrameTree
     returns
       # Present frame tree structure.
       FrameTree frameTree

   # Returns metrics relating to the layouting of the page, such as viewport bounds/scale.
   command getLayoutMetrics
     returns
       # Deprecated metrics relating to the layout viewport. Is in device pixels. Use `cssLayoutViewport` instead.
       deprecated LayoutViewport layoutViewport
       # Deprecated metrics relating to the visual viewport. Is in device pixels. Use `cssVisualViewport` instead.
       deprecated VisualViewport visualViewport
       # Deprecated size of scrollable area. Is in DP. Use `cssContentSize` instead.
       deprecated DOM.Rect contentSize
       # Metrics relating to the layout viewport in CSS pixels.
       LayoutViewport cssLayoutViewport
       # Metrics relating to the visual viewport in CSS pixels.
       VisualViewport cssVisualViewport
       # Size of scrollable area in CSS pixels.
       DOM.Rect cssContentSize

   # Returns navigation history for the current page.
   command getNavigationHistory
     returns
       # Index of the current navigation history entry.
       integer currentIndex
       # Array of navigation history entries.
       array of NavigationEntry entries

   # Resets navigation history for the current page.
   command resetNavigationHistory

   # Returns content of the given resource.
   experimental command getResourceContent
     parameters
       # Frame id to get resource for.
       FrameId frameId
       # URL of the resource to get content for.
       string url
     returns
       # Resource content.
       string content
       # True, if content was served as base64.
       boolean base64Encoded

   # Returns present frame / resource tree structure.
   experimental command getResourceTree
     returns
       # Present frame / resource tree structure.
       FrameResourceTree frameTree

   # Accepts or dismisses a JavaScript initiated dialog (alert, confirm, prompt, or onbeforeunload).
   command handleJavaScriptDialog
     parameters
       # Whether to accept or dismiss the dialog.
       boolean accept
       # The text to enter into the dialog prompt before accepting. Used only if this is a prompt
       # dialog.
       optional string promptText

   # Navigates current page to the given URL.
   command navigate
     parameters
       # URL to navigate the page to.
       string url
       # Referrer URL.
       optional string referrer
       # Intended transition type.
       optional TransitionType transitionType
       # Frame id to navigate, if not specified navigates the top frame.
       optional FrameId frameId
       # Referrer-policy used for the navigation.
       experimental optional ReferrerPolicy referrerPolicy
     returns
       # Frame id that has navigated (or failed to navigate)
       FrameId frameId
       # Loader identifier. This is omitted in case of same-document navigation,
       # as the previously committed loaderId would not change.
       optional Network.LoaderId loaderId
       # User friendly error message, present if and only if navigation has failed.
       optional string errorText

   # Navigates current page to the given history entry.
   command navigateToHistoryEntry
     parameters
       # Unique id of the entry to navigate to.
       integer entryId

   # Print page as PDF.
   command printToPDF
     parameters
       # Paper orientation. Defaults to false.
       optional boolean landscape
       # Display header and footer. Defaults to false.
       optional boolean displayHeaderFooter
       # Print background graphics. Defaults to false.
       optional boolean printBackground
       # Scale of the webpage rendering. Defaults to 1.
       optional number scale
       # Paper width in inches. Defaults to 8.5 inches.
       optional number paperWidth
       # Paper height in inches. Defaults to 11 inches.
       optional number paperHeight
       # Top margin in inches. Defaults to 1cm (~0.4 inches).
       optional number marginTop
       # Bottom margin in inches. Defaults to 1cm (~0.4 inches).
       optional number marginBottom
       # Left margin in inches. Defaults to 1cm (~0.4 inches).
       optional number marginLeft
       # Right margin in inches. Defaults to 1cm (~0.4 inches).
       optional number marginRight
       # Paper ranges to print, one based, e.g., '1-5, 8, 11-13'. Pages are
       # printed in the document order, not in the order specified, and no
       # more than once.
       # Defaults to empty string, which implies the entire document is printed.
       # The page numbers are quietly capped to actual page count of the
       # document, and ranges beyond the end of the document are ignored.
       # If this results in no pages to print, an error is reported.
       # It is an error to specify a range with start greater than end.
       optional string pageRanges
       # HTML template for the print header. Should be valid HTML markup with following
       # classes used to inject printing values into them:
       # - `date`: formatted print date
       # - `title`: document title
       # - `url`: document location
       # - `pageNumber`: current page number
       # - `totalPages`: total pages in the document
       #
       # For example, `<span class=title></span>` would generate span containing the title.
       optional string headerTemplate
       # HTML template for the print footer. Should use the same format as the `headerTemplate`.
       optional string footerTemplate
       # Whether or not to prefer page size as defined by css. Defaults to false,
       # in which case the content will be scaled to fit the paper size.
       optional boolean preferCSSPageSize
       # return as stream
       experimental optional enum transferMode
         ReturnAsBase64
         ReturnAsStream
       # Whether or not to generate tagged (accessible) PDF. Defaults to embedder choice.
       experimental optional boolean generateTaggedPDF
       # Whether or not to embed the document outline into the PDF.
       experimental optional boolean generateDocumentOutline
     returns
       # Base64-encoded pdf data. Empty if |returnAsStream| is specified.
       binary data
       # A handle of the stream that holds resulting PDF data.
       experimental optional IO.StreamHandle stream

   # Reloads given page optionally ignoring the cache.
   command reload
     parameters
       # If true, browser cache is ignored (as if the user pressed Shift+refresh).
       optional boolean ignoreCache
       # If set, the script will be injected into all frames of the inspected page after reload.
       # Argument will be ignored if reloading dataURL origin.
       optional string scriptToEvaluateOnLoad
       # If set, an error will be thrown if the target page's main frame's
       # loader id does not match the provided id. This prevents accidentally
       # reloading an unintended target in case there's a racing navigation.
       experimental optional Network.LoaderId loaderId

   # Deprecated, please use removeScriptToEvaluateOnNewDocument instead.
   experimental deprecated command removeScriptToEvaluateOnLoad
     parameters
       ScriptIdentifier identifier

   # Removes given script from the list.
   command removeScriptToEvaluateOnNewDocument
     parameters
       ScriptIdentifier identifier

   # Acknowledges that a screencast frame has been received by the frontend.
   experimental command screencastFrameAck
     parameters
       # Frame number.
       integer sessionId

   # Searches for given string in resource content.
   experimental command searchInResource
     parameters
       # Frame id for resource to search in.
       FrameId frameId
       # URL of the resource to search in.
       string url
       # String to search for.
       string query
       # If true, search is case sensitive.
       optional boolean caseSensitive
       # If true, treats string parameter as regex.
       optional boolean isRegex
     returns
       # List of search matches.
       array of Debugger.SearchMatch result

   # Enable Chrome's experimental ad filter on all sites.
   experimental command setAdBlockingEnabled
     parameters
       # Whether to block ads.
       boolean enabled

   # Enable page Content Security Policy by-passing.
   command setBypassCSP
     parameters
       # Whether to bypass page CSP.
       boolean enabled

   # Get Permissions Policy state on given frame.
   experimental command getPermissionsPolicyState
     parameters
       FrameId frameId
     returns
       array of PermissionsPolicyFeatureState states

   # Get Origin Trials on given frame.
   experimental command getOriginTrials
     parameters
       FrameId frameId
     returns
       array of OriginTrial originTrials

   # Overrides the values of device screen dimensions (window.screen.width, window.screen.height,
   # window.innerWidth, window.innerHeight, and "device-width"/"device-height"-related CSS media
   # query results).
   experimental deprecated command setDeviceMetricsOverride
     # Use 'Emulation.setDeviceMetricsOverride' instead
     redirect Emulation
     parameters
       # Overriding width value in pixels (minimum 0, maximum 10000000). 0 disables the override.
       integer width
       # Overriding height value in pixels (minimum 0, maximum 10000000). 0 disables the override.
       integer height
       # Overriding device scale factor value. 0 disables the override.
       number deviceScaleFactor
       # Whether to emulate mobile device. This includes viewport meta tag, overlay scrollbars, text
       # autosizing and more.
       boolean mobile
       # Scale to apply to resulting view image.
       optional number scale
       # Overriding screen width value in pixels (minimum 0, maximum 10000000).
       optional integer screenWidth
       # Overriding screen height value in pixels (minimum 0, maximum 10000000).
       optional integer screenHeight
       # Overriding view X position on screen in pixels (minimum 0, maximum 10000000).
       optional integer positionX
       # Overriding view Y position on screen in pixels (minimum 0, maximum 10000000).
       optional integer positionY
       # Do not set visible view size, rely upon explicit setVisibleSize call.
       optional boolean dontSetVisibleSize
       # Screen orientation override.
       optional Emulation.ScreenOrientation screenOrientation
       # The viewport dimensions and scale. If not set, the override is cleared.
       optional Viewport viewport

   # Overrides the Device Orientation.
   experimental deprecated command setDeviceOrientationOverride
     # Use 'DeviceOrientation.setDeviceOrientationOverride' instead
     redirect DeviceOrientation
     parameters
       # Mock alpha
       number alpha
       # Mock beta
       number beta
       # Mock gamma
       number gamma

   # Set generic font families.
   experimental command setFontFamilies
     parameters
       # Specifies font families to set. If a font family is not specified, it won't be changed.
       FontFamilies fontFamilies
       # Specifies font families to set for individual scripts.
       optional array of ScriptFontFamilies forScripts

   # Set default font sizes.
   experimental command setFontSizes
     parameters
       # Specifies font sizes to set. If a font size is not specified, it won't be changed.
       FontSizes fontSizes

   # Sets given markup as the document's HTML.
   command setDocumentContent
     parameters
       # Frame id to set HTML for.
       FrameId frameId
       # HTML content to set.
       string html

   # Set the behavior when downloading a file.
   experimental deprecated command setDownloadBehavior
     parameters
       # Whether to allow all or deny all download requests, or use default Chrome behavior if
       # available (otherwise deny).
       enum behavior
         deny
         allow
         default
       # The default path to save downloaded files to. This is required if behavior is set to 'allow'
       optional string downloadPath

   # Overrides the Geolocation Position or Error. Omitting any of the parameters emulates position
   # unavailable.
   deprecated command setGeolocationOverride
     # Use 'Emulation.setGeolocationOverride' instead
     redirect Emulation
     parameters
       # Mock latitude
       optional number latitude
       # Mock longitude
       optional number longitude
       # Mock accuracy
       optional number accuracy

   # Controls whether page will emit lifecycle events.
   command setLifecycleEventsEnabled
     parameters
       # If true, starts emitting lifecycle events.
       boolean enabled

   # Toggles mouse event-based touch event emulation.
   experimental deprecated command setTouchEmulationEnabled
     # Use 'Emulation.setTouchEmulationEnabled' instead
     redirect Emulation
     parameters
       # Whether the touch event emulation should be enabled.
       boolean enabled
       # Touch/gesture events configuration. Default: current platform.
       optional enum configuration
         mobile
         desktop

   # Starts sending each frame using the `screencastFrame` event.
   experimental command startScreencast
     parameters
       # Image compression format.
       optional enum format
         jpeg
         png
       # Compression quality from range [0..100].
       optional integer quality
       # Maximum screenshot width.
       optional integer maxWidth
       # Maximum screenshot height.
       optional integer maxHeight
       # Send every n-th frame.
       optional integer everyNthFrame

   # Force the page stop all navigations and pending resource fetches.
   command stopLoading

   # Crashes renderer on the IO thread, generates minidumps.
   experimental command crash

   # Tries to close page, running its beforeunload hooks, if any.
   command close

   # Tries to update the web lifecycle state of the page.
   # It will transition the page to the given state according to:
   # https://github.com/WICG/web-lifecycle/
   experimental command setWebLifecycleState
     parameters
       # Target lifecycle state
       enum state
         frozen
         active

   # Stops sending each frame in the `screencastFrame`.
   experimental command stopScreencast

   # Requests backend to produce compilation cache for the specified scripts.
   # `scripts` are appended to the list of scripts for which the cache
   # would be produced. The list may be reset during page navigation.
   # When script with a matching URL is encountered, the cache is optionally
   # produced upon backend discretion, based on internal heuristics.
   # See also: `Page.compilationCacheProduced`.
   experimental command produceCompilationCache
     parameters
       array of CompilationCacheParams scripts

   # Seeds compilation cache for given url. Compilation cache does not survive
   # cross-process navigation.
   experimental command addCompilationCache
     parameters
       string url
       # Base64-encoded data
       binary data

   # Clears seeded compilation cache.
   experimental command clearCompilationCache

   # Enum of possible auto-response for permission / prompt dialogs.
   experimental type AutoResponseMode extends string
     enum
       none
       autoAccept
       autoReject
       autoOptOut

   # Sets the Secure Payment Confirmation transaction mode.
   # https://w3c.github.io/secure-payment-confirmation/#sctn-automation-set-spc-transaction-mode
   experimental command setSPCTransactionMode
     parameters
       AutoResponseMode mode

   # Extensions for Custom Handlers API:
   # https://html.spec.whatwg.org/multipage/system-state.html#rph-automation
   experimental command setRPHRegistrationMode
     parameters
       AutoResponseMode mode

   # Generates a report for testing.
   experimental command generateTestReport
     parameters
       # Message to be displayed in the report.
       string message
       # Specifies the endpoint group to deliver the report to.
       optional string group

   # Pauses page execution. Can be resumed using generic Runtime.runIfWaitingForDebugger.
   experimental command waitForDebugger

   # Intercept file chooser requests and transfer control to protocol clients.
   # When file chooser interception is enabled, native file chooser dialog is not shown.
   # Instead, a protocol event `Page.fileChooserOpened` is emitted.
   command setInterceptFileChooserDialog
     parameters
       boolean enabled
       # If true, cancels the dialog by emitting relevant events (if any)
       # in addition to not showing it if the interception is enabled
       # (default: false).
       experimental optional boolean cancel

   event domContentEventFired
     parameters
       Network.MonotonicTime timestamp

   # Emitted only when `page.interceptFileChooser` is enabled.
   event fileChooserOpened
     parameters
       # Id of the frame containing input node.
       experimental FrameId frameId
       # Input mode.
       enum mode
         selectSingle
         selectMultiple
       # Input node id. Only present for file choosers opened via an `<input type="file">` element.
       experimental optional DOM.BackendNodeId backendNodeId

   # Fired when frame has been attached to its parent.
   event frameAttached
     parameters
       # Id of the frame that has been attached.
       FrameId frameId
       # Parent frame identifier.
       FrameId parentFrameId
       # JavaScript stack trace of when frame was attached, only set if frame initiated from script.
       optional Runtime.StackTrace stack

   # Fired when frame no longer has a scheduled navigation.
   deprecated event frameClearedScheduledNavigation
     parameters
       # Id of the frame that has cleared its scheduled navigation.
       FrameId frameId

   # Fired when frame has been detached from its parent.
   event frameDetached
     parameters
       # Id of the frame that has been detached.
       FrameId frameId
       experimental enum reason
         # The frame is removed from the DOM.
         remove
         # The frame is being swapped out in favor of an out-of-process iframe.
         # A new frame target will be created (see Target.attachedToTarget).
         swap

   # Fired before frame subtree is detached. Emitted before any frame of the
   # subtree is actually detached.
   experimental event frameSubtreeWillBeDetached
     parameters
       # Id of the frame that is the root of the subtree that will be detached.
       FrameId frameId

   # The type of a frameNavigated event.
   experimental type NavigationType extends string
     enum
       Navigation
       BackForwardCacheRestore

   # Fired once navigation of the frame has completed. Frame is now associated with the new loader.
   event frameNavigated
     parameters
       # Frame object.
       Frame frame
       experimental NavigationType type

   # Fired when opening document to write to.
   experimental event documentOpened
     parameters
       # Frame object.
       Frame frame

   experimental event frameResized

   # Fired when a navigation starts. This event is fired for both
   # renderer-initiated and browser-initiated navigations. For renderer-initiated
   # navigations, the event is fired after `frameRequestedNavigation`.
   # Navigation may still be cancelled after the event is issued. Multiple events
   # can be fired for a single navigation, for example, when a same-document
   # navigation becomes a cross-document navigation (such as in the case of a
   # frameset).
   experimental event frameStartedNavigating
     parameters
       # ID of the frame that is being navigated.
       FrameId frameId
       # The URL the navigation started with. The final URL can be different.
       string url
       # Loader identifier. Even though it is present in case of same-document
       # navigation, the previously committed loaderId would not change unless
       # the navigation changes from a same-document to a cross-document
       # navigation.
       Network.LoaderId loaderId
       enum navigationType
         reload
         reloadBypassingCache
         restore
         restoreWithPost
         historySameDocument
         historyDifferentDocument
         sameDocument
         differentDocument

   # Fired when a renderer-initiated navigation is requested.
   # Navigation may still be cancelled after the event is issued.
   experimental event frameRequestedNavigation
     parameters
       # Id of the frame that is being navigated.
       FrameId frameId
       # The reason for the navigation.
       ClientNavigationReason reason
       # The destination URL for the requested navigation.
       string url
       # The disposition for the navigation.
       ClientNavigationDisposition disposition

   # Fired when frame schedules a potential navigation.
   deprecated event frameScheduledNavigation
     parameters
       # Id of the frame that has scheduled a navigation.
       FrameId frameId
       # Delay (in seconds) until the navigation is scheduled to begin. The navigation is not
       # guaranteed to start.
       number delay
       # The reason for the navigation.
       ClientNavigationReason reason
       # The destination URL for the scheduled navigation.
       string url

   # Fired when frame has started loading.
   experimental event frameStartedLoading
     parameters
       # Id of the frame that has started loading.
       FrameId frameId

   # Fired when frame has stopped loading.
   experimental event frameStoppedLoading
     parameters
       # Id of the frame that has stopped loading.
       FrameId frameId

   # Fired when page is about to start a download.
   # Deprecated. Use Browser.downloadWillBegin instead.
   experimental deprecated event downloadWillBegin
     parameters
       # Id of the frame that caused download to begin.
       FrameId frameId
       # Global unique identifier of the download.
       string guid
       # URL of the resource being downloaded.
       string url
       # Suggested file name of the resource (the actual name of the file saved on disk may differ).
       string suggestedFilename

   # Fired when download makes progress. Last call has |done| == true.
   # Deprecated. Use Browser.downloadProgress instead.
   experimental deprecated event downloadProgress
     parameters
       # Global unique identifier of the download.
       string guid
       # Total expected bytes to download.
       number totalBytes
       # Total bytes received.
       number receivedBytes
       # Download status.
       enum state
         inProgress
         completed
         canceled

   # Fired when interstitial page was hidden
   event interstitialHidden

   # Fired when interstitial page was shown
   event interstitialShown

   # Fired when a JavaScript initiated dialog (alert, confirm, prompt, or onbeforeunload) has been
   # closed.
   event javascriptDialogClosed
     parameters
       # Frame id.
       experimental FrameId frameId
       # Whether dialog was confirmed.
       boolean result
       # User input in case of prompt.
       string userInput

   # Fired when a JavaScript initiated dialog (alert, confirm, prompt, or onbeforeunload) is about to
   # open.
   event javascriptDialogOpening
     parameters
       # Frame url.
       string url
       # Frame id.
       experimental FrameId frameId
       # Message that will be displayed by the dialog.
       string message
       # Dialog type.
       DialogType type
       # True iff browser is capable showing or acting on the given dialog. When browser has no
       # dialog handler for given target, calling alert while Page domain is engaged will stall
       # the page execution. Execution can be resumed via calling Page.handleJavaScriptDialog.
       boolean hasBrowserHandler
       # Default dialog prompt.
       optional string defaultPrompt

   # Fired for lifecycle events (navigation, load, paint, etc) in the current
   # target (including local frames).
   event lifecycleEvent
     parameters
       # Id of the frame.
       FrameId frameId
       # Loader identifier. Empty string if the request is fetched from worker.
       Network.LoaderId loaderId
       string name
       Network.MonotonicTime timestamp

   # List of not restored reasons for back-forward cache.
   experimental type BackForwardCacheNotRestoredReason extends string
     enum
       NotPrimaryMainFrame
       BackForwardCacheDisabled
       RelatedActiveContentsExist
       HTTPStatusNotOK
       SchemeNotHTTPOrHTTPS
       Loading
       WasGrantedMediaAccess
       DisableForRenderFrameHostCalled
       DomainNotAllowed
       HTTPMethodNotGET
       SubframeIsNavigating
       Timeout
       CacheLimit
       JavaScriptExecution
       RendererProcessKilled
       RendererProcessCrashed
       SchedulerTrackedFeatureUsed
       ConflictingBrowsingInstance
       CacheFlushed
       ServiceWorkerVersionActivation
       SessionRestored
       ServiceWorkerPostMessage
       EnteredBackForwardCacheBeforeServiceWorkerHostAdded
       RenderFrameHostReused_SameSite
       RenderFrameHostReused_CrossSite
       ServiceWorkerClaim
       IgnoreEventAndEvict
       HaveInnerContents
       TimeoutPuttingInCache
       BackForwardCacheDisabledByLowMemory
       BackForwardCacheDisabledByCommandLine
       NetworkRequestDatapipeDrainedAsBytesConsumer
       NetworkRequestRedirected
       NetworkRequestTimeout
       NetworkExceedsBufferLimit
       NavigationCancelledWhileRestoring
       NotMostRecentNavigationEntry
       BackForwardCacheDisabledForPrerender
       UserAgentOverrideDiffers
       ForegroundCacheLimit
       BrowsingInstanceNotSwapped
       BackForwardCacheDisabledForDelegate
       UnloadHandlerExistsInMainFrame
       UnloadHandlerExistsInSubFrame
       ServiceWorkerUnregistration
       CacheControlNoStore
       CacheControlNoStoreCookieModified
       CacheControlNoStoreHTTPOnlyCookieModified
       NoResponseHead
       Unknown
       ActivationNavigationsDisallowedForBug1234857
       ErrorDocument
       FencedFramesEmbedder
       CookieDisabled
       HTTPAuthRequired
       CookieFlushed
       BroadcastChannelOnMessage
       WebViewSettingsChanged
       WebViewJavaScriptObjectChanged
       WebViewMessageListenerInjected
       WebViewSafeBrowsingAllowlistChanged
       WebViewDocumentStartJavascriptChanged
       #Blocklisted features
       WebSocket
       WebTransport
       WebRTC
       MainResourceHasCacheControlNoStore
       MainResourceHasCacheControlNoCache
       SubresourceHasCacheControlNoStore
       SubresourceHasCacheControlNoCache
       ContainsPlugins
       DocumentLoaded
       OutstandingNetworkRequestOthers
       RequestedMIDIPermission
       RequestedAudioCapturePermission
       RequestedVideoCapturePermission
       RequestedBackForwardCacheBlockedSensors
       RequestedBackgroundWorkPermission
       BroadcastChannel
       WebXR
       SharedWorker
       WebLocks
       WebHID
       WebShare
       RequestedStorageAccessGrant
       WebNfc
       OutstandingNetworkRequestFetch
       OutstandingNetworkRequestXHR
       AppBanner
       Printing
       WebDatabase
       PictureInPicture
       SpeechRecognizer
       IdleManager
       PaymentManager
       SpeechSynthesis
       KeyboardLock
       WebOTPService
       OutstandingNetworkRequestDirectSocket
       InjectedJavascript
       InjectedStyleSheet
       KeepaliveRequest
       IndexedDBEvent
       Dummy
       JsNetworkRequestReceivedCacheControlNoStoreResource
       WebRTCSticky
       WebTransportSticky
       WebSocketSticky
       SmartCard
       LiveMediaStreamTrack
       UnloadHandler
       ParserAborted
       # Disabled for RenderFrameHost reasons
       # See content/browser/renderer_host/back_forward_cache_disable.h for explanations.
       ContentSecurityHandler
       ContentWebAuthenticationAPI
       ContentFileChooser
       ContentSerial
       ContentFileSystemAccess
       ContentMediaDevicesDispatcherHost
       ContentWebBluetooth
       ContentWebUSB
       ContentMediaSessionService
       ContentScreenReader
       ContentDiscarded

       # See components/back_forward_cache/back_forward_cache_disable.h for explanations.
       EmbedderPopupBlockerTabHelper
       EmbedderSafeBrowsingTriggeredPopupBlocker
       EmbedderSafeBrowsingThreatDetails
       EmbedderAppBannerManager
       EmbedderDomDistillerViewerSource
       EmbedderDomDistillerSelfDeletingRequestDelegate
       EmbedderOomInterventionTabHelper
       EmbedderOfflinePage
       EmbedderChromePasswordManagerClientBindCredentialManager
       EmbedderPermissionRequestManager
       EmbedderModalDialog
       EmbedderExtensions
       EmbedderExtensionMessaging
       EmbedderExtensionMessagingForOpenPort
       EmbedderExtensionSentMessageToCachedFrame
       RequestedByWebViewClient
       PostMessageByWebViewClient
       CacheControlNoStoreDeviceBoundSessionTerminated
       CacheLimitPrunedOnModerateMemoryPressure
       CacheLimitPrunedOnCriticalMemoryPressure

   # Types of not restored reasons for back-forward cache.
   experimental type BackForwardCacheNotRestoredReasonType extends string
     enum
       SupportPending
       PageSupportNeeded
       Circumstantial

   experimental type BackForwardCacheBlockingDetails extends object
     properties
       # Url of the file where blockage happened. Optional because of tests.
       optional string url
       # Function name where blockage happened. Optional because of anonymous functions and tests.
       optional string function
       # Line number in the script (0-based).
       integer lineNumber
       # Column number in the script (0-based).
       integer columnNumber

   experimental type BackForwardCacheNotRestoredExplanation extends object
     properties
       # Type of the reason
       BackForwardCacheNotRestoredReasonType type
       # Not restored reason
       BackForwardCacheNotRestoredReason reason
       # Context associated with the reason. The meaning of this context is
       # dependent on the reason:
       # - EmbedderExtensionSentMessageToCachedFrame: the extension ID.
       #
       optional string context
       optional array of BackForwardCacheBlockingDetails details

   experimental type BackForwardCacheNotRestoredExplanationTree extends object
     properties
       # URL of each frame
       string url
       # Not restored reasons of each frame
       array of BackForwardCacheNotRestoredExplanation explanations
       # Array of children frame
       array of BackForwardCacheNotRestoredExplanationTree children

   # Fired for failed bfcache history navigations if BackForwardCache feature is enabled. Do
   # not assume any ordering with the Page.frameNavigated event. This event is fired only for
   # main-frame history navigation where the document changes (non-same-document navigations),
   # when bfcache navigation fails.
   experimental event backForwardCacheNotUsed
     parameters
       # The loader id for the associated navigation.
       Network.LoaderId loaderId
       # The frame id of the associated frame.
       FrameId frameId
       # Array of reasons why the page could not be cached. This must not be empty.
       array of BackForwardCacheNotRestoredExplanation notRestoredExplanations
       # Tree structure of reasons why the page could not be cached for each frame.
       optional BackForwardCacheNotRestoredExplanationTree notRestoredExplanationsTree

   event loadEventFired
     parameters
       Network.MonotonicTime timestamp

   # Fired when same-document navigation happens, e.g. due to history API usage or anchor navigation.
   experimental event navigatedWithinDocument
     parameters
       # Id of the frame.
       FrameId frameId
       # Frame's new url.
       string url
       # Navigation type
       enum navigationType
         # Navigation due to fragment navigation.
         fragment
         # Navigation due to history API usage.
         historyApi
         # Navigation due to other reasons.
         other


   # Compressed image data requested by the `startScreencast`.
   experimental event screencastFrame
     parameters
       # Base64-encoded compressed image.
       binary data
       # Screencast frame metadata.
       ScreencastFrameMetadata metadata
       # Frame number.
       integer sessionId

   # Fired when the page with currently enabled screencast was shown or hidden `.
   experimental event screencastVisibilityChanged
     parameters
       # True if the page is visible.
       boolean visible

   # Fired when a new window is going to be opened, via window.open(), link click, form submission,
   # etc.
   event windowOpen
     parameters
       # The URL for the new window.
       string url
       # Window name.
       string windowName
       # An array of enabled window features.
       array of string windowFeatures
       # Whether or not it was triggered by user gesture.
       boolean userGesture

   # Issued for every compilation cache generated. Is only available
   # if Page.setGenerateCompilationCache is enabled.
   experimental event compilationCacheProduced
     parameters
       string url
       # Base64-encoded data
       binary data

   # Enable/disable prerendering manually.
   #
   # This command is a short-term solution for https://crbug.com/1440085.
   # See https://docs.google.com/document/d/12HVmFxYj5Jc-eJr5OmWsa2bqTJsbgGLKI6ZIyx0_wpA
   # for more details.
   #
   # TODO(https://crbug.com/1440085): Remove this once Puppeteer supports tab targets.
   experimental command setPrerenderingAllowed
     parameters
       boolean isAllowed

 domain Performance

   # Run-time execution metric.
   type Metric extends object
     properties
       # Metric name.
       string name
       # Metric value.
       number value

   # Disable collecting and reporting metrics.
   command disable

   # Enable collecting and reporting metrics.
   command enable
     parameters
       # Time domain to use for collecting and reporting duration metrics.
       optional enum timeDomain
         # Use monotonically increasing abstract time (default).
         timeTicks
         # Use thread running time.
         threadTicks

   # Sets time domain to use for collecting and reporting duration metrics.
   # Note that this must be called before enabling metrics collection. Calling
   # this method while metrics collection is enabled returns an error.
   experimental deprecated command setTimeDomain
     parameters
       # Time domain
       enum timeDomain
         # Use monotonically increasing abstract time (default).
         timeTicks
         # Use thread running time.
         threadTicks

   # Retrieve current values of run-time metrics.
   command getMetrics
     returns
       # Current values for run-time metrics.
       array of Metric metrics

   # Current values of the metrics.
   event metrics
     parameters
       # Current values of the metrics.
       array of Metric metrics
       # Timestamp title.
       string title

 # Reporting of performance timeline events, as specified in
 # https://w3c.github.io/performance-timeline/#dom-performanceobserver.
 experimental domain PerformanceTimeline
   depends on DOM
   depends on Network

   # See https://github.com/WICG/LargestContentfulPaint and largest_contentful_paint.idl
   type LargestContentfulPaint extends object
     properties
       Network.TimeSinceEpoch renderTime
       Network.TimeSinceEpoch loadTime
       # The number of pixels being painted.
       number size
       # The id attribute of the element, if available.
       optional string elementId
       # The URL of the image (may be trimmed).
       optional string url
       optional DOM.BackendNodeId nodeId

   type LayoutShiftAttribution extends object
     properties
       DOM.Rect previousRect
       DOM.Rect currentRect
       optional DOM.BackendNodeId nodeId

   # See https://wicg.github.io/layout-instability/#sec-layout-shift and layout_shift.idl
   type LayoutShift extends object
     properties
       # Score increment produced by this event.
       number value
       boolean hadRecentInput
       Network.TimeSinceEpoch lastInputTime
       array of LayoutShiftAttribution sources

   type TimelineEvent extends object
     properties
       # Identifies the frame that this event is related to. Empty for non-frame targets.
       Page.FrameId frameId
       # The event type, as specified in https://w3c.github.io/performance-timeline/#dom-performanceentry-entrytype
       # This determines which of the optional "details" fields is present.
       string type
       # Name may be empty depending on the type.
       string name
       # Time in seconds since Epoch, monotonically increasing within document lifetime.
       Network.TimeSinceEpoch time
       # Event duration, if applicable.
       optional number duration
       optional LargestContentfulPaint lcpDetails
       optional LayoutShift layoutShiftDetails

   # Previously buffered events would be reported before method returns.
   # See also: timelineEventAdded
   command enable
     parameters
       # The types of event to report, as specified in
       # https://w3c.github.io/performance-timeline/#dom-performanceentry-entrytype
       # The specified filter overrides any previous filters, passing empty
       # filter disables recording.
       # Note that not all types exposed to the web platform are currently supported.
       array of string eventTypes

   # Sent when a performance timeline event is added. See reportPerformanceTimeline method.
   event timelineEventAdded
     parameters
       TimelineEvent event

 # Security
 domain Security

   # An internal certificate ID value.
   type CertificateId extends integer

   # A description of mixed content (HTTP resources on HTTPS pages), as defined by
   # https://www.w3.org/TR/mixed-content/#categories
   type MixedContentType extends string
     enum
       blockable
       optionally-blockable
       none

   # The security level of a page or resource.
   type SecurityState extends string
     enum
       unknown
       neutral
       insecure
       secure
       info
       insecure-broken

   # Details about the security state of the page certificate.
   experimental type CertificateSecurityState extends object
     properties
       # Protocol name (e.g. "TLS 1.2" or "QUIC").
       string protocol
       # Key Exchange used by the connection, or the empty string if not applicable.
       string keyExchange
       # (EC)DH group used by the connection, if applicable.
       optional string keyExchangeGroup
       # Cipher name.
       string cipher
       # TLS MAC. Note that AEAD ciphers do not have separate MACs.
       optional string mac
       # Page certificate.
       array of string certificate
       # Certificate subject name.
       string subjectName
       # Name of the issuing CA.
       string issuer
       # Certificate valid from date.
       Network.TimeSinceEpoch validFrom
       # Certificate valid to (expiration) date
       Network.TimeSinceEpoch validTo
       # The highest priority network error code, if the certificate has an error.
       optional string certificateNetworkError
       # True if the certificate uses a weak signature algorithm.
       boolean certificateHasWeakSignature
       # True if the certificate has a SHA1 signature in the chain.
       boolean certificateHasSha1Signature
       # True if modern SSL
       boolean modernSSL
       # True if the connection is using an obsolete SSL protocol.
       boolean obsoleteSslProtocol
       # True if the connection is using an obsolete SSL key exchange.
       boolean obsoleteSslKeyExchange
       # True if the connection is using an obsolete SSL cipher.
       boolean obsoleteSslCipher
       # True if the connection is using an obsolete SSL signature.
       boolean obsoleteSslSignature

   experimental type SafetyTipStatus extends string
     enum
       badReputation
       lookalike

   experimental type SafetyTipInfo extends object
     properties
       # Describes whether the page triggers any safety tips or reputation warnings. Default is unknown.
       SafetyTipStatus safetyTipStatus
       # The URL the safety tip suggested ("Did you mean?"). Only filled in for lookalike matches.
       optional string safeUrl

   # Security state information about the page.
   experimental type VisibleSecurityState extends object
     properties
       # The security level of the page.
       SecurityState securityState
       # Security state details about the page certificate.
       optional CertificateSecurityState certificateSecurityState
       # The type of Safety Tip triggered on the page. Note that this field will be set even if the Safety Tip UI was not actually shown.
       optional SafetyTipInfo safetyTipInfo
       # Array of security state issues ids.
       array of string securityStateIssueIds

   # An explanation of an factor contributing to the security state.
   type SecurityStateExplanation extends object
     properties
       # Security state representing the severity of the factor being explained.
       SecurityState securityState
       # Title describing the type of factor.
       string title
       # Short phrase describing the type of factor.
       string summary
       # Full text explanation of the factor.
       string description
       # The type of mixed content described by the explanation.
       MixedContentType mixedContentType
       # Page certificate.
       array of string certificate
       # Recommendations to fix any issues.
       optional array of string recommendations

   # Information about insecure content on the page.
   deprecated type InsecureContentStatus extends object
     properties
       # Always false.
       boolean ranMixedContent
       # Always false.
       boolean displayedMixedContent
       # Always false.
       boolean containedMixedForm
       # Always false.
       boolean ranContentWithCertErrors
       # Always false.
       boolean displayedContentWithCertErrors
       # Always set to unknown.
       SecurityState ranInsecureContentStyle
       # Always set to unknown.
       SecurityState displayedInsecureContentStyle

   # The action to take when a certificate error occurs. continue will continue processing the
   # request and cancel will cancel the request.
   type CertificateErrorAction extends string
     enum
       continue
       cancel

   # Disables tracking security state changes.
   command disable

   # Enables tracking security state changes.
   command enable

   # Enable/disable whether all certificate errors should be ignored.
   command setIgnoreCertificateErrors
     parameters
       # If true, all certificate errors will be ignored.
       boolean ignore

   # Handles a certificate error that fired a certificateError event.
   deprecated command handleCertificateError
     parameters
       # The ID of the event.
       integer eventId
       # The action to take on the certificate error.
       CertificateErrorAction action

   # Enable/disable overriding certificate errors. If enabled, all certificate error events need to
   # be handled by the DevTools client and should be answered with `handleCertificateError` commands.
   deprecated command setOverrideCertificateErrors
     parameters
       # If true, certificate errors will be overridden.
       boolean override

   # There is a certificate error. If overriding certificate errors is enabled, then it should be
   # handled with the `handleCertificateError` command. Note: this event does not fire if the
   # certificate error has been allowed internally. Only one client per target should override
   # certificate errors at the same time.
   deprecated event certificateError
     parameters
       # The ID of the event.
       integer eventId
       # The type of the error.
       string errorType
       # The url that was requested.
       string requestURL

   # The security state of the page changed.
   experimental event visibleSecurityStateChanged
     parameters
       # Security state information about the page.
       VisibleSecurityState visibleSecurityState

   # The security state of the page changed. No longer being sent.
   deprecated event securityStateChanged
     parameters
       # Security state.
       SecurityState securityState
       # True if the page was loaded over cryptographic transport such as HTTPS.
       deprecated boolean schemeIsCryptographic
       # Previously a list of explanations for the security state. Now always
       # empty.
       deprecated array of SecurityStateExplanation explanations
       # Information about insecure content on the page.
       deprecated InsecureContentStatus insecureContentStatus
       # Overrides user-visible description of the state. Always omitted.
       deprecated optional string summary

 experimental domain ServiceWorker
   depends on Target

   type RegistrationID extends string

   # ServiceWorker registration.
   type ServiceWorkerRegistration extends object
     properties
       RegistrationID registrationId
       string scopeURL
       boolean isDeleted

   type ServiceWorkerVersionRunningStatus extends string
     enum
       stopped
       starting
       running
       stopping

   type ServiceWorkerVersionStatus extends string
     enum
       new
       installing
       installed
       activating
       activated
       redundant

   # ServiceWorker version.
   type ServiceWorkerVersion extends object
     properties
       string versionId
       RegistrationID registrationId
       string scriptURL
       ServiceWorkerVersionRunningStatus runningStatus
       ServiceWorkerVersionStatus status
       # The Last-Modified header value of the main script.
       optional number scriptLastModified
       # The time at which the response headers of the main script were received from the server.
       # For cached script it is the last time the cache entry was validated.
       optional number scriptResponseTime
       optional array of Target.TargetID controlledClients
       optional Target.TargetID targetId
       optional string routerRules

   # ServiceWorker error message.
   type ServiceWorkerErrorMessage extends object
     properties
       string errorMessage
       RegistrationID registrationId
       string versionId
       string sourceURL
       integer lineNumber
       integer columnNumber

   command deliverPushMessage
     parameters
       string origin
       RegistrationID registrationId
       string data

   command disable

   command dispatchSyncEvent
     parameters
       string origin
       RegistrationID registrationId
       string tag
       boolean lastChance

   command dispatchPeriodicSyncEvent
     parameters
       string origin
       RegistrationID registrationId
       string tag

   command enable

   command inspectWorker
     parameters
       string versionId

   command setForceUpdateOnPageLoad
     parameters
       boolean forceUpdateOnPageLoad

   command skipWaiting
     parameters
       string scopeURL

   command startWorker
     parameters
       string scopeURL

   command stopAllWorkers

   command stopWorker
     parameters
       string versionId

   command unregister
     parameters
       string scopeURL

   command updateRegistration
     parameters
       string scopeURL

   event workerErrorReported
     parameters
       ServiceWorkerErrorMessage errorMessage

   event workerRegistrationUpdated
     parameters
       array of ServiceWorkerRegistration registrations

   event workerVersionUpdated
     parameters
       array of ServiceWorkerVersion versions

 experimental domain Storage
   depends on Browser
   depends on Network

   type SerializedStorageKey extends string

   # Enum of possible storage types.
   type StorageType extends string
     enum
       cookies
       file_systems
       indexeddb
       local_storage
       shader_cache
       websql
       service_workers
       cache_storage
       interest_groups
       shared_storage
       storage_buckets
       all
       other

   # Usage for a storage type.
   type UsageForType extends object
     properties
       # Name of storage type.
       StorageType storageType
       # Storage usage (bytes).
       number usage

   # Pair of issuer origin and number of available (signed, but not used) Trust
   # Tokens from that issuer.
   experimental type TrustTokens extends object
     properties
       string issuerOrigin
       number count

   # Protected audience interest group auction identifier.
   type InterestGroupAuctionId extends string

   # Enum of interest group access types.
   type InterestGroupAccessType extends string
     enum
       join
       leave
       update
       loaded
       bid
       win
       additionalBid
       additionalBidWin
       topLevelBid
       topLevelAdditionalBid
       clear

   # Enum of auction events.
   type InterestGroupAuctionEventType extends string
     enum
       started
       configResolved

   # Enum of network fetches auctions can do.
   type InterestGroupAuctionFetchType extends string
     enum
       bidderJs
       bidderWasm
       sellerJs
       bidderTrustedSignals
       sellerTrustedSignals

   # Enum of shared storage access scopes.
   type SharedStorageAccessScope extends string
     enum
       window
       sharedStorageWorklet
       protectedAudienceWorklet
       header

   # Enum of shared storage access methods.
   type SharedStorageAccessMethod extends string
     enum
       addModule
       createWorklet
       selectURL
       run
       batchUpdate
       set
       append
       delete
       clear
       get
       keys
       values
       entries
       length
       remainingBudget

   # Struct for a single key-value pair in an origin's shared storage.
   type SharedStorageEntry extends object
     properties
       string key
       string value

   # Details for an origin's shared storage.
   type SharedStorageMetadata extends object
     properties
       # Time when the origin's shared storage was last created.
       Network.TimeSinceEpoch creationTime
       # Number of key-value pairs stored in origin's shared storage.
       integer length
       # Current amount of bits of entropy remaining in the navigation budget.
       number remainingBudget
       # Total number of bytes stored as key-value pairs in origin's shared
       # storage.
       integer bytesUsed

   # Represents a dictionary object passed in as privateAggregationConfig to
   # run or selectURL.
   type SharedStoragePrivateAggregationConfig extends object
     properties
       # The chosen aggregation service deployment.
       optional string aggregationCoordinatorOrigin
       # The context ID provided.
       optional string contextId
       # Configures the maximum size allowed for filtering IDs.
       integer filteringIdMaxBytes
       # The limit on the number of contributions in the final report.
       optional integer maxContributions

   # Pair of reporting metadata details for a candidate URL for `selectURL()`.
   type SharedStorageReportingMetadata extends object
     properties
       string eventType
       string reportingUrl

   # Bundles a candidate URL with its reporting metadata.
   type SharedStorageUrlWithMetadata extends object
     properties
       # Spec of candidate URL.
       string url
       # Any associated reporting metadata.
       array of SharedStorageReportingMetadata reportingMetadata

   # Bundles the parameters for shared storage access events whose
   # presence/absence can vary according to SharedStorageAccessType.
   type SharedStorageAccessParams extends object
     properties
       # Spec of the module script URL.
       # Present only for SharedStorageAccessMethods: addModule and
       # createWorklet.
       optional string scriptSourceUrl
       # String denoting "context-origin", "script-origin", or a custom
       # origin to be used as the worklet's data origin.
       # Present only for SharedStorageAccessMethod: createWorklet.
       optional string dataOrigin
       # Name of the registered operation to be run.
       # Present only for SharedStorageAccessMethods: run and selectURL.
       optional string operationName
       # Whether or not to keep the worket alive for future run or selectURL
       # calls.
       # Present only for SharedStorageAccessMethods: run and selectURL.
       optional boolean keepAlive
       # Configures the private aggregation options.
       # Present only for SharedStorageAccessMethods: run and selectURL.
       optional SharedStoragePrivateAggregationConfig privateAggregationConfig
       # The operation's serialized data in bytes (converted to a string).
       # Present only for SharedStorageAccessMethods: run and selectURL.
       # TODO(crbug.com/401011862): Consider updating this parameter to binary.
       optional string serializedData
       # Array of candidate URLs' specs, along with any associated metadata.
       # Present only for SharedStorageAccessMethod: selectURL.
       optional array of SharedStorageUrlWithMetadata urlsWithMetadata
       # Spec of the URN:UUID generated for a selectURL call.
       # Present only for SharedStorageAccessMethod: selectURL.
       optional string urnUuid
       # Key for a specific entry in an origin's shared storage.
       # Present only for SharedStorageAccessMethods: set, append, delete, and
       # get.
       optional string key
       # Value for a specific entry in an origin's shared storage.
       # Present only for SharedStorageAccessMethods: set and append.
       optional string value
       # Whether or not to set an entry for a key if that key is already present.
       # Present only for SharedStorageAccessMethod: set.
       optional boolean ignoreIfPresent
       # If the method is called on a worklet, or as part of
       # a worklet script, it will have an ID for the associated worklet.
       # Present only for SharedStorageAccessMethods: addModule, createWorklet,
       # run, selectURL, and any other SharedStorageAccessMethod when the
       # SharedStorageAccessScope is worklet.
       optional string workletId
       # Name of the lock to be acquired, if present.
       # Optionally present only for SharedStorageAccessMethods: batchUpdate,
       # set, append, delete, and clear.
       optional string withLock
       # If the method has been called as part of a batchUpdate, then this
       # number identifies the batch to which it belongs.
       # Optionally present only for SharedStorageAccessMethods:
       # batchUpdate (required), set, append, delete, and clear.
       optional string batchUpdateId
       # Number of modifier methods sent in batch.
       # Present only for SharedStorageAccessMethod: batchUpdate.
       optional integer batchSize

   type StorageBucketsDurability extends string
     enum
       relaxed
       strict

   type StorageBucket extends object
     properties
       SerializedStorageKey storageKey
       # If not specified, it is the default bucket of the storageKey.
       optional string name

   type StorageBucketInfo extends object
     properties
       StorageBucket bucket
       string id
       Network.TimeSinceEpoch expiration
       # Storage quota (bytes).
       number quota
       boolean persistent
       StorageBucketsDurability durability

   # Returns a storage key given a frame id.
   command getStorageKeyForFrame
     parameters
       Page.FrameId frameId
     returns
       SerializedStorageKey storageKey

   # Clears storage for origin.
   command clearDataForOrigin
     parameters
       # Security origin.
       string origin
       # Comma separated list of StorageType to clear.
       string storageTypes

   # Clears storage for storage key.
   command clearDataForStorageKey
     parameters
       # Storage key.
       string storageKey
       # Comma separated list of StorageType to clear.
       string storageTypes

   # Returns all browser cookies.
   command getCookies
     parameters
       # Browser context to use when called on the browser endpoint.
       optional Browser.BrowserContextID browserContextId
     returns
       # Array of cookie objects.
       array of Network.Cookie cookies

   # Sets given cookies.
   command setCookies
     parameters
       # Cookies to be set.
       array of Network.CookieParam cookies
       # Browser context to use when called on the browser endpoint.
       optional Browser.BrowserContextID browserContextId

   # Clears cookies.
   command clearCookies
     parameters
       # Browser context to use when called on the browser endpoint.
       optional Browser.BrowserContextID browserContextId

   # Returns usage and quota in bytes.
   command getUsageAndQuota
     parameters
       # Security origin.
       string origin
     returns
       # Storage usage (bytes).
       number usage
       # Storage quota (bytes).
       number quota
       # Whether or not the origin has an active storage quota override
       boolean overrideActive
       # Storage usage per type (bytes).
       array of UsageForType usageBreakdown

   # Override quota for the specified origin
   experimental command overrideQuotaForOrigin
     parameters
       # Security origin.
       string origin
       # The quota size (in bytes) to override the original quota with.
       # If this is called multiple times, the overridden quota will be equal to
       # the quotaSize provided in the final call. If this is called without
       # specifying a quotaSize, the quota will be reset to the default value for
       # the specified origin. If this is called multiple times with different
       # origins, the override will be maintained for each origin until it is
       # disabled (called without a quotaSize).
       optional number quotaSize

   # Registers origin to be notified when an update occurs to its cache storage list.
   command trackCacheStorageForOrigin
     parameters
       # Security origin.
       string origin

   # Registers storage key to be notified when an update occurs to its cache storage list.
   command trackCacheStorageForStorageKey
     parameters
       # Storage key.
       string storageKey

   # Registers origin to be notified when an update occurs to its IndexedDB.
   command trackIndexedDBForOrigin
     parameters
       # Security origin.
       string origin

   # Registers storage key to be notified when an update occurs to its IndexedDB.
   command trackIndexedDBForStorageKey
     parameters
       # Storage key.
       string storageKey

   # Unregisters origin from receiving notifications for cache storage.
   command untrackCacheStorageForOrigin
     parameters
       # Security origin.
       string origin

   # Unregisters storage key from receiving notifications for cache storage.
   command untrackCacheStorageForStorageKey
     parameters
       # Storage key.
       string storageKey

   # Unregisters origin from receiving notifications for IndexedDB.
   command untrackIndexedDBForOrigin
     parameters
       # Security origin.
       string origin

   # Unregisters storage key from receiving notifications for IndexedDB.
   command untrackIndexedDBForStorageKey
     parameters
       # Storage key.
       string storageKey

   # Returns the number of stored Trust Tokens per issuer for the
   # current browsing context.
   experimental command getTrustTokens
     returns
       array of TrustTokens tokens

   # Removes all Trust Tokens issued by the provided issuerOrigin.
   # Leaves other stored data, including the issuer's Redemption Records, intact.
   experimental command clearTrustTokens
     parameters
       string issuerOrigin
     returns
       # True if any tokens were deleted, false otherwise.
       boolean didDeleteTokens

   # Gets details for a named interest group.
   experimental command getInterestGroupDetails
     parameters
       string ownerOrigin
       string name
     returns
       # This largely corresponds to:
       # https://wicg.github.io/turtledove/#dictdef-generatebidinterestgroup
       # but has absolute expirationTime instead of relative lifetimeMs and
       # also adds joiningOrigin.
       object details

   # Enables/Disables issuing of interestGroupAccessed events.
   experimental command setInterestGroupTracking
     parameters
       boolean enable

   # Enables/Disables issuing of interestGroupAuctionEventOccurred and
   # interestGroupAuctionNetworkRequestCreated.
   experimental command setInterestGroupAuctionTracking
     parameters
       boolean enable

   # Gets metadata for an origin's shared storage.
   experimental command getSharedStorageMetadata
     parameters
       string ownerOrigin
     returns
       SharedStorageMetadata metadata

   # Gets the entries in an given origin's shared storage.
   experimental command getSharedStorageEntries
     parameters
       string ownerOrigin
     returns
       array of SharedStorageEntry entries

   # Sets entry with `key` and `value` for a given origin's shared storage.
   experimental command setSharedStorageEntry
     parameters
       string ownerOrigin
       string key
       string value
       # If `ignoreIfPresent` is included and true, then only sets the entry if
       # `key` doesn't already exist.
       optional boolean ignoreIfPresent

   # Deletes entry for `key` (if it exists) for a given origin's shared storage.
   experimental command deleteSharedStorageEntry
     parameters
       string ownerOrigin
       string key

   # Clears all entries for a given origin's shared storage.
   experimental command clearSharedStorageEntries
     parameters
       string ownerOrigin

   # Resets the budget for `ownerOrigin` by clearing all budget withdrawals.
   experimental command resetSharedStorageBudget
     parameters
       string ownerOrigin

   # Enables/disables issuing of sharedStorageAccessed events.
   experimental command setSharedStorageTracking
     parameters
       boolean enable

   # Set tracking for a storage key's buckets.
   experimental command setStorageBucketTracking
     parameters
       string storageKey
       boolean enable

   # Deletes the Storage Bucket with the given storage key and bucket name.
   experimental command deleteStorageBucket
     parameters
       StorageBucket bucket

   # Deletes state for sites identified as potential bounce trackers, immediately.
   experimental command runBounceTrackingMitigations
     returns
       array of string deletedSites

   # A cache's contents have been modified.
   event cacheStorageContentUpdated
     parameters
       # Origin to update.
       string origin
       # Storage key to update.
       string storageKey
       # Storage bucket to update.
       string bucketId
       # Name of cache in origin.
       string cacheName

   # A cache has been added/deleted.
   event cacheStorageListUpdated
     parameters
       # Origin to update.
       string origin
       # Storage key to update.
       string storageKey
       # Storage bucket to update.
       string bucketId

   # The origin's IndexedDB object store has been modified.
   event indexedDBContentUpdated
     parameters
       # Origin to update.
       string origin
       # Storage key to update.
       string storageKey
       # Storage bucket to update.
       string bucketId
       # Database to update.
       string databaseName
       # ObjectStore to update.
       string objectStoreName

   # The origin's IndexedDB database list has been modified.
   event indexedDBListUpdated
     parameters
       # Origin to update.
       string origin
       # Storage key to update.
       string storageKey
       # Storage bucket to update.
       string bucketId

   # One of the interest groups was accessed. Note that these events are global
   # to all targets sharing an interest group store.
   event interestGroupAccessed
     parameters
       Network.TimeSinceEpoch accessTime
       InterestGroupAccessType type
       string ownerOrigin
       string name
       # For topLevelBid/topLevelAdditionalBid, and when appropriate,
       # win and additionalBidWin
       optional string componentSellerOrigin
       # For bid or somethingBid event, if done locally and not on a server.
       optional number bid
       optional string bidCurrency
       # For non-global events --- links to interestGroupAuctionEvent
       optional InterestGroupAuctionId uniqueAuctionId

   # An auction involving interest groups is taking place. These events are
   # target-specific.
   event interestGroupAuctionEventOccurred
     parameters
       Network.TimeSinceEpoch eventTime
       InterestGroupAuctionEventType type
       InterestGroupAuctionId uniqueAuctionId
       # Set for child auctions.
       optional InterestGroupAuctionId parentAuctionId
       # Set for started and configResolved
       optional object auctionConfig

   # Specifies which auctions a particular network fetch may be related to, and
   # in what role. Note that it is not ordered with respect to
   # Network.requestWillBeSent (but will happen before loadingFinished
   # loadingFailed).
   event interestGroupAuctionNetworkRequestCreated
     parameters
       InterestGroupAuctionFetchType type
       Network.RequestId requestId
       # This is the set of the auctions using the worklet that issued this
       # request.  In the case of trusted signals, it's possible that only some of
       # them actually care about the keys being queried.
       array of InterestGroupAuctionId auctions

   # Shared storage was accessed by the associated page.
   # The following parameters are included in all events.
   event sharedStorageAccessed
     parameters
       # Time of the access.
       Network.TimeSinceEpoch accessTime
       # Enum value indicating the access scope.
       SharedStorageAccessScope scope
       # Enum value indicating the Shared Storage API method invoked.
       SharedStorageAccessMethod method
       # DevTools Frame Token for the primary frame tree's root.
       Page.FrameId mainFrameId
       # Serialization of the origin owning the Shared Storage data.
       string ownerOrigin
       # Serialization of the site owning the Shared Storage data.
       string ownerSite
       # The sub-parameters wrapped by `params` are all optional and their
       # presence/absence depends on `type`.
       SharedStorageAccessParams params

   event storageBucketCreatedOrUpdated
     parameters
       StorageBucketInfo bucketInfo

   event storageBucketDeleted
     parameters
       string bucketId

   # https://wicg.github.io/attribution-reporting-api/
   experimental command setAttributionReportingLocalTestingMode
     parameters
       # If enabled, noise is suppressed and reports are sent immediately.
       boolean enabled

   # Enables/disables issuing of Attribution Reporting events.
   experimental command setAttributionReportingTracking
     parameters
       boolean enable

   # Sends all pending Attribution Reports immediately, regardless of their
   # scheduled report time.
   experimental command sendPendingAttributionReports
     returns
       # The number of reports that were sent.
       integer numSent

   experimental type AttributionReportingSourceType extends string
     enum
       navigation
       event

   experimental type UnsignedInt64AsBase10 extends string
   experimental type UnsignedInt128AsBase16 extends string
   experimental type SignedInt64AsBase10 extends string

   experimental type AttributionReportingFilterDataEntry extends object
     properties
       string key
       array of string values

   experimental type AttributionReportingFilterConfig extends object
     properties
       array of AttributionReportingFilterDataEntry filterValues
       # duration in seconds
       optional integer lookbackWindow

   experimental type AttributionReportingFilterPair extends object
     properties
       array of AttributionReportingFilterConfig filters
       array of AttributionReportingFilterConfig notFilters

   experimental type AttributionReportingAggregationKeysEntry extends object
     properties
       string key
       UnsignedInt128AsBase16 value

   experimental type AttributionReportingEventReportWindows extends object
     properties
       # duration in seconds
       integer start
       # duration in seconds
       array of integer ends

   experimental type AttributionReportingTriggerDataMatching extends string
     enum
       exact
       modulus

   experimental type AttributionReportingAggregatableDebugReportingData extends object
     properties
       UnsignedInt128AsBase16 keyPiece
       # number instead of integer because not all uint32 can be represented by
       # int
       number value
       array of string types

   experimental type AttributionReportingAggregatableDebugReportingConfig extends object
     properties
       # number instead of integer because not all uint32 can be represented by
       # int, only present for source registrations
       optional number budget
       UnsignedInt128AsBase16 keyPiece
       array of AttributionReportingAggregatableDebugReportingData debugData
       optional string aggregationCoordinatorOrigin

   experimental type AttributionScopesData extends object
     properties
       array of string values
       # number instead of integer because not all uint32 can be represented by
       # int
       number limit
       number maxEventStates

   experimental type AttributionReportingNamedBudgetDef extends object
     properties
       string name
       integer budget

   experimental type AttributionReportingSourceRegistration extends object
     properties
       Network.TimeSinceEpoch time
       # duration in seconds
       integer expiry
       # number instead of integer because not all uint32 can be represented by
       # int
       array of number triggerData
       AttributionReportingEventReportWindows eventReportWindows
       # duration in seconds
       integer aggregatableReportWindow
       AttributionReportingSourceType type
       string sourceOrigin
       string reportingOrigin
       array of string destinationSites
       UnsignedInt64AsBase10 eventId
       SignedInt64AsBase10 priority
       array of AttributionReportingFilterDataEntry filterData
       array of AttributionReportingAggregationKeysEntry aggregationKeys
       optional UnsignedInt64AsBase10 debugKey
       AttributionReportingTriggerDataMatching triggerDataMatching
       SignedInt64AsBase10 destinationLimitPriority
       AttributionReportingAggregatableDebugReportingConfig aggregatableDebugReportingConfig
       optional AttributionScopesData scopesData
       integer maxEventLevelReports
       array of AttributionReportingNamedBudgetDef namedBudgets
       boolean debugReporting
       number eventLevelEpsilon

   experimental type AttributionReportingSourceRegistrationResult extends string
     enum
       success
       internalError
       insufficientSourceCapacity
       insufficientUniqueDestinationCapacity
       excessiveReportingOrigins
       prohibitedByBrowserPolicy
       successNoised
       destinationReportingLimitReached
       destinationGlobalLimitReached
       destinationBothLimitsReached
       reportingOriginsPerSiteLimitReached
       exceedsMaxChannelCapacity
       exceedsMaxScopesChannelCapacity
       exceedsMaxTriggerStateCardinality
       exceedsMaxEventStatesLimit
       destinationPerDayReportingLimitReached

   experimental event attributionReportingSourceRegistered
     parameters
       AttributionReportingSourceRegistration registration
       AttributionReportingSourceRegistrationResult result

   experimental type AttributionReportingSourceRegistrationTimeConfig extends string
     enum
       include
       exclude

   experimental type AttributionReportingAggregatableValueDictEntry extends object
     properties
       string key
       # number instead of integer because not all uint32 can be represented by
       # int
       number value
       UnsignedInt64AsBase10 filteringId


   experimental type AttributionReportingAggregatableValueEntry extends object
     properties
       array of AttributionReportingAggregatableValueDictEntry values
       AttributionReportingFilterPair filters

   experimental type AttributionReportingEventTriggerData extends object
     properties
       UnsignedInt64AsBase10 data
       SignedInt64AsBase10 priority
       optional UnsignedInt64AsBase10 dedupKey
       AttributionReportingFilterPair filters

   experimental type AttributionReportingAggregatableTriggerData extends object
     properties
       UnsignedInt128AsBase16 keyPiece
       array of string sourceKeys
       AttributionReportingFilterPair filters

   experimental type AttributionReportingAggregatableDedupKey extends object
     properties
       optional UnsignedInt64AsBase10 dedupKey
       AttributionReportingFilterPair filters

   experimental type AttributionReportingNamedBudgetCandidate extends object
     properties
       optional string name
       AttributionReportingFilterPair filters

   experimental type AttributionReportingTriggerRegistration extends object
     properties
       AttributionReportingFilterPair filters
       optional UnsignedInt64AsBase10 debugKey
       array of AttributionReportingAggregatableDedupKey aggregatableDedupKeys
       array of AttributionReportingEventTriggerData eventTriggerData
       array of AttributionReportingAggregatableTriggerData aggregatableTriggerData
       array of AttributionReportingAggregatableValueEntry aggregatableValues
       integer aggregatableFilteringIdMaxBytes
       boolean debugReporting
       optional string aggregationCoordinatorOrigin
       AttributionReportingSourceRegistrationTimeConfig sourceRegistrationTimeConfig
       optional string triggerContextId
       AttributionReportingAggregatableDebugReportingConfig aggregatableDebugReportingConfig
       array of string scopes
       array of AttributionReportingNamedBudgetCandidate namedBudgets

   experimental type AttributionReportingEventLevelResult extends string
     enum
       success
       successDroppedLowerPriority
       internalError
       noCapacityForAttributionDestination
       noMatchingSources
       deduplicated
       excessiveAttributions
       priorityTooLow
       neverAttributedSource
       excessiveReportingOrigins
       noMatchingSourceFilterData
       prohibitedByBrowserPolicy
       noMatchingConfigurations
       excessiveReports
       falselyAttributedSource
       reportWindowPassed
       notRegistered
       reportWindowNotStarted
       noMatchingTriggerData

   experimental type AttributionReportingAggregatableResult extends string
     enum
       success
       internalError
       noCapacityForAttributionDestination
       noMatchingSources
       excessiveAttributions
       excessiveReportingOrigins
       noHistograms
       insufficientBudget
       insufficientNamedBudget
       noMatchingSourceFilterData
       notRegistered
       prohibitedByBrowserPolicy
       deduplicated
       reportWindowPassed
       excessiveReports

   experimental event attributionReportingTriggerRegistered
     parameters
       AttributionReportingTriggerRegistration registration
       AttributionReportingEventLevelResult eventLevel
       AttributionReportingAggregatableResult aggregatable

   experimental type AttributionReportingReportResult extends string
     enum
       # A network request was attempted for the report.
       sent
       # No request was attempted because of browser policy.
       prohibited
       # No request was attempted because of an error in report assembly,
       # e.g. the aggregation service was unavailable.
       failedToAssemble
       # No request was attempted because the report's expiry passed.
       expired

   experimental event attributionReportingReportSent
     parameters
       string url
       object body
       AttributionReportingReportResult result
       # If result is `sent`, populated with net/HTTP status.
       optional integer netError
       optional string netErrorName
       optional integer httpStatusCode

   # A single Related Website Set object.
   experimental type RelatedWebsiteSet extends object
     properties
       # The primary site of this set, along with the ccTLDs if there is any.
       array of string primarySites
       # The associated sites of this set, along with the ccTLDs if there is any.
       array of string associatedSites
       # The service sites of this set, along with the ccTLDs if there is any.
       array of string serviceSites

   # Returns the effective Related Website Sets in use by this profile for the browser
   # session. The effective Related Website Sets will not change during a browser session.
   experimental command getRelatedWebsiteSets
     returns
       array of RelatedWebsiteSet sets

   # Returns the list of URLs from a page and its embedded resources that match
   # existing grace period URL pattern rules.
   # https://developers.google.com/privacy-sandbox/cookies/temporary-exceptions/grace-period
   experimental command getAffectedUrlsForThirdPartyCookieMetadata
     parameters
       # The URL of the page currently being visited.
       string firstPartyUrl
       # The list of embedded resource URLs from the page.
       array of string thirdPartyUrls

     returns
       # Array of matching URLs. If there is a primary pattern match for the first-
       # party URL, only the first-party URL is returned in the array.
       array of string matchedUrls

   command setProtectedAudienceKAnonymity
     parameters
       string owner
       string name
       array of binary hashes

 # The SystemInfo domain defines methods and events for querying low-level system information.
 experimental domain SystemInfo

   # Describes a single graphics processor (GPU).
   type GPUDevice extends object
     properties
       # PCI ID of the GPU vendor, if available; 0 otherwise.
       number vendorId
       # PCI ID of the GPU device, if available; 0 otherwise.
       number deviceId
       # Sub sys ID of the GPU, only available on Windows.
       optional number subSysId
       # Revision of the GPU, only available on Windows.
       optional number revision
       # String description of the GPU vendor, if the PCI ID is not available.
       string vendorString
       # String description of the GPU device, if the PCI ID is not available.
       string deviceString
       # String description of the GPU driver vendor.
       string driverVendor
       # String description of the GPU driver version.
       string driverVersion

   # Describes the width and height dimensions of an entity.
   type Size extends object
     properties
       # Width in pixels.
       integer width
       # Height in pixels.
       integer height

   # Describes a supported video decoding profile with its associated minimum and
   # maximum resolutions.
   type VideoDecodeAcceleratorCapability extends object
     properties
       # Video codec profile that is supported, e.g. VP9 Profile 2.
       string profile
       # Maximum video dimensions in pixels supported for this |profile|.
       Size maxResolution
       # Minimum video dimensions in pixels supported for this |profile|.
       Size minResolution

   # Describes a supported video encoding profile with its associated maximum
   # resolution and maximum framerate.
   type VideoEncodeAcceleratorCapability extends object
     properties
       # Video codec profile that is supported, e.g H264 Main.
       string profile
       # Maximum video dimensions in pixels supported for this |profile|.
       Size maxResolution
       # Maximum encoding framerate in frames per second supported for this
       # |profile|, as fraction's numerator and denominator, e.g. 24/1 fps,
       # 24000/1001 fps, etc.
       integer maxFramerateNumerator
       integer maxFramerateDenominator

   # YUV subsampling type of the pixels of a given image.
   type SubsamplingFormat extends string
     enum
       yuv420
       yuv422
       yuv444

   # Image format of a given image.
   type ImageType extends string
     enum
       jpeg
       webp
       unknown

   # Describes a supported image decoding profile with its associated minimum and
   # maximum resolutions and subsampling.
   type ImageDecodeAcceleratorCapability extends object
     properties
       # Image coded, e.g. Jpeg.
       ImageType imageType
       # Maximum supported dimensions of the image in pixels.
       Size maxDimensions
       # Minimum supported dimensions of the image in pixels.
       Size minDimensions
       # Optional array of supported subsampling formats, e.g. 4:2:0, if known.
       array of SubsamplingFormat subsamplings

   # Provides information about the GPU(s) on the system.
   type GPUInfo extends object
     properties
       # The graphics devices on the system. Element 0 is the primary GPU.
       array of GPUDevice devices
       # An optional dictionary of additional GPU related attributes.
       optional object auxAttributes
       # An optional dictionary of graphics features and their status.
       optional object featureStatus
       # An optional array of GPU driver bug workarounds.
       array of string driverBugWorkarounds
       # Supported accelerated video decoding capabilities.
       array of VideoDecodeAcceleratorCapability videoDecoding
       # Supported accelerated video encoding capabilities.
       array of VideoEncodeAcceleratorCapability videoEncoding
       # Supported accelerated image decoding capabilities.
       array of ImageDecodeAcceleratorCapability imageDecoding

   # Represents process info.
   type ProcessInfo extends object
     properties
       # Specifies process type.
       string type
       # Specifies process id.
       integer id
       # Specifies cumulative CPU usage in seconds across all threads of the
       # process since the process start.
       number cpuTime

   # Returns information about the system.
   command getInfo
     returns
       # Information about the GPUs on the system.
       GPUInfo gpu
       # A platform-dependent description of the model of the machine. On Mac OS, this is, for
       # example, 'MacBookPro'. Will be the empty string if not supported.
       string modelName
       # A platform-dependent description of the version of the machine. On Mac OS, this is, for
       # example, '10.1'. Will be the empty string if not supported.
       string modelVersion
       # The command line string used to launch the browser. Will be the empty string if not
       # supported.
       string commandLine

   # Returns information about the feature state.
   command getFeatureState
     parameters
       string featureState
     returns
       boolean featureEnabled

   # Returns information about all running processes.
   command getProcessInfo
     returns
       # An array of process info blocks.
       array of ProcessInfo processInfo

 # Supports additional targets discovery and allows to attach to them.
 domain Target

   type TargetID extends string

   # Unique identifier of attached debugging session.
   type SessionID extends string

   type TargetInfo extends object
     properties
       TargetID targetId
       # List of types: https://source.chromium.org/chromium/chromium/src/+/main:content/browser/devtools/devtools_agent_host_impl.cc?ss=chromium&q=f:devtools%20-f:out%20%22::kTypeTab%5B%5D%22
       string type
       string title
       string url
       # Whether the target has an attached client.
       boolean attached
       # Opener target Id
       optional TargetID openerId
       # Whether the target has access to the originating window.
       experimental boolean canAccessOpener
       # Frame id of originating window (is only set if target has an opener).
       experimental optional Page.FrameId openerFrameId
       experimental optional Browser.BrowserContextID browserContextId
       # Provides additional details for specific target types. For example, for
       # the type of "page", this may be set to "prerender".
       experimental optional string subtype

   # A filter used by target query/discovery/auto-attach operations.
   experimental type FilterEntry extends object
     properties
       # If set, causes exclusion of matching targets from the list.
       optional boolean exclude
       # If not present, matches any type.
       optional string type

   # The entries in TargetFilter are matched sequentially against targets and
   # the first entry that matches determines if the target is included or not,
   # depending on the value of `exclude` field in the entry.
   # If filter is not specified, the one assumed is
   # [{type: "browser", exclude: true}, {type: "tab", exclude: true}, {}]
   # (i.e. include everything but `browser` and `tab`).
   experimental type TargetFilter extends array of FilterEntry

   experimental type RemoteLocation extends object
     properties
       string host
       integer port

   # The state of the target window.
   experimental type WindowState extends string
     enum
       normal
       minimized
       maximized
       fullscreen

   # Activates (focuses) the target.
   command activateTarget
     parameters
       TargetID targetId

   # Attaches to the target with given id.
   command attachToTarget
     parameters
       TargetID targetId
       # Enables "flat" access to the session via specifying sessionId attribute in the commands.
       # We plan to make this the default, deprecate non-flattened mode,
       # and eventually retire it. See crbug.com/991325.
       optional boolean flatten
     returns
       # Id assigned to the session.
       SessionID sessionId

   # Attaches to the browser target, only uses flat sessionId mode.
   experimental command attachToBrowserTarget
     returns
       # Id assigned to the session.
       SessionID sessionId

   # Closes the target. If the target is a page that gets closed too.
   command closeTarget
     parameters
       TargetID targetId
     returns
       # Always set to true. If an error occurs, the response indicates protocol error.
       deprecated boolean success

   # Inject object to the target's main frame that provides a communication
   # channel with browser target.
   #
   # Injected object will be available as `window[bindingName]`.
   #
   # The object has the following API:
   # - `binding.send(json)` - a method to send messages over the remote debugging protocol
   # - `binding.onmessage = json => handleMessage(json)` - a callback that will be called for the protocol notifications and command responses.
   experimental command exposeDevToolsProtocol
     parameters
       TargetID targetId
       # Binding name, 'cdp' if not specified.
       optional string bindingName
       # If true, inherits the current root session's permissions (default: false).
       optional boolean inheritPermissions

   # Creates a new empty BrowserContext. Similar to an incognito profile but you can have more than
   # one.
   command createBrowserContext
     parameters
       # If specified, disposes this context when debugging session disconnects.
       experimental optional boolean disposeOnDetach
       # Proxy server, similar to the one passed to --proxy-server
       experimental optional string proxyServer
       # Proxy bypass list, similar to the one passed to --proxy-bypass-list
       experimental optional string proxyBypassList
       # An optional list of origins to grant unlimited cross-origin access to.
       # Parts of the URL other than those constituting origin are ignored.
       experimental optional array of string originsWithUniversalNetworkAccess
     returns
       # The id of the context created.
       Browser.BrowserContextID browserContextId

   # Returns all browser contexts created with `Target.createBrowserContext` method.
   command getBrowserContexts
     returns
       # An array of browser context ids.
       array of Browser.BrowserContextID browserContextIds

   # Creates a new page.
   command createTarget
     parameters
       # The initial URL the page will be navigated to. An empty string indicates about:blank.
       string url
       # Frame left origin in DIP (requires newWindow to be true or headless shell).
       experimental optional integer left
       # Frame top origin in DIP (requires newWindow to be true or headless shell).
       experimental optional integer top
       # Frame width in DIP (requires newWindow to be true or headless shell).
       optional integer width
       # Frame height in DIP (requires newWindow to be true or headless shell).
       optional integer height
       # Frame window state (requires newWindow to be true or headless shell).
       # Default is normal.
       optional WindowState windowState
       # The browser context to create the page in.
       experimental optional Browser.BrowserContextID browserContextId
       # Whether BeginFrames for this target will be controlled via DevTools (headless shell only,
       # not supported on MacOS yet, false by default).
       experimental optional boolean enableBeginFrameControl
       # Whether to create a new Window or Tab (false by default, not supported by headless shell).
       optional boolean newWindow
       # Whether to create the target in background or foreground (false by default, not supported
       # by headless shell).
       optional boolean background
       # Whether to create the target of type "tab".
       experimental optional boolean forTab
       # Whether to create a hidden target. The hidden target is observable via protocol, but not
       # present in the tab UI strip. Cannot be created with `forTab: true`, `newWindow: true` or
       # `background: false`. The life-time of the tab is limited to the life-time of the session.
       experimental optional boolean hidden
     returns
       # The id of the page opened.
       TargetID targetId

   # Detaches session with given id.
   command detachFromTarget
     parameters
       # Session to detach.
       optional SessionID sessionId
       # Deprecated.
       deprecated optional TargetID targetId

   # Deletes a BrowserContext. All the belonging pages will be closed without calling their
   # beforeunload hooks.
   command disposeBrowserContext
     parameters
       Browser.BrowserContextID browserContextId

   # Returns information about a target.
   experimental command getTargetInfo
     parameters
       optional TargetID targetId
     returns
       TargetInfo targetInfo

   # Retrieves a list of available targets.
   command getTargets
     parameters
       # Only targets matching filter will be reported. If filter is not specified
       # and target discovery is currently enabled, a filter used for target discovery
       # is used for consistency.
       experimental optional TargetFilter filter
     returns
       # The list of targets.
       array of TargetInfo targetInfos

   # Sends protocol message over session with given id.
   # Consider using flat mode instead; see commands attachToTarget, setAutoAttach,
   # and crbug.com/991325.
   deprecated command sendMessageToTarget
     parameters
       string message
       # Identifier of the session.
       optional SessionID sessionId
       # Deprecated.
       deprecated optional TargetID targetId

   # Controls whether to automatically attach to new targets which are considered
   # to be directly related to this one (for example, iframes or workers).
   # When turned on, attaches to all existing related targets as well. When turned off,
   # automatically detaches from all currently attached targets.
   # This also clears all targets added by `autoAttachRelated` from the list of targets to watch
   # for creation of related targets.
   # You might want to call this recursively for auto-attached targets to attach
   # to all available targets.
   command setAutoAttach
     parameters
       # Whether to auto-attach to related targets.
       boolean autoAttach
       # Whether to pause new targets when attaching to them. Use `Runtime.runIfWaitingForDebugger`
       # to run paused targets.
       boolean waitForDebuggerOnStart
       # Enables "flat" access to the session via specifying sessionId attribute in the commands.
       # We plan to make this the default, deprecate non-flattened mode,
       # and eventually retire it. See crbug.com/991325.
       experimental optional boolean flatten
       # Only targets matching filter will be attached.
       experimental optional TargetFilter filter

   # Adds the specified target to the list of targets that will be monitored for any related target
   # creation (such as child frames, child workers and new versions of service worker) and reported
   # through `attachedToTarget`. The specified target is also auto-attached.
   # This cancels the effect of any previous `setAutoAttach` and is also cancelled by subsequent
   # `setAutoAttach`. Only available at the Browser target.
   experimental command autoAttachRelated
     parameters
       TargetID targetId
       # Whether to pause new targets when attaching to them. Use `Runtime.runIfWaitingForDebugger`
       # to run paused targets.
       boolean waitForDebuggerOnStart
       # Only targets matching filter will be attached.
       experimental optional TargetFilter filter

   # Controls whether to discover available targets and notify via
   # `targetCreated/targetInfoChanged/targetDestroyed` events.
   command setDiscoverTargets
     parameters
       # Whether to discover available targets.
       boolean discover
       # Only targets matching filter will be attached. If `discover` is false,
       # `filter` must be omitted or empty.
       experimental optional TargetFilter filter

   # Enables target discovery for the specified locations, when `setDiscoverTargets` was set to
   # `true`.
   experimental command setRemoteLocations
     parameters
       # List of remote locations.
       array of RemoteLocation locations

   # Issued when attached to target because of auto-attach or `attachToTarget` command.
   experimental event attachedToTarget
     parameters
       # Identifier assigned to the session used to send/receive messages.
       SessionID sessionId
       TargetInfo targetInfo
       boolean waitingForDebugger

   # Issued when detached from target for any reason (including `detachFromTarget` command). Can be
   # issued multiple times per target if multiple sessions have been attached to it.
   experimental event detachedFromTarget
     parameters
       # Detached session identifier.
       SessionID sessionId
       # Deprecated.
       deprecated optional TargetID targetId

   # Notifies about a new protocol message received from the session (as reported in
   # `attachedToTarget` event).
   event receivedMessageFromTarget
     parameters
       # Identifier of a session which sends a message.
       SessionID sessionId
       string message
       # Deprecated.
       deprecated optional TargetID targetId

   # Issued when a possible inspection target is created.
   event targetCreated
     parameters
       TargetInfo targetInfo

   # Issued when a target is destroyed.
   event targetDestroyed
     parameters
       TargetID targetId

   # Issued when a target has crashed.
   event targetCrashed
     parameters
       TargetID targetId
       # Termination status type.
       string status
       # Termination error code.
       integer errorCode

   # Issued when some information about a target has changed. This only happens between
   # `targetCreated` and `targetDestroyed`.
   event targetInfoChanged
     parameters
       TargetInfo targetInfo

 # The Tethering domain defines methods and events for browser port binding.
 experimental domain Tethering

   # Request browser port binding.
   command bind
     parameters
       # Port number to bind.
       integer port

   # Request browser port unbinding.
   command unbind
     parameters
       # Port number to unbind.
       integer port

   # Informs that port was successfully bound and got a specified connection id.
   event accepted
     parameters
       # Port number that was successfully bound.
       integer port
       # Connection id to be used.
       string connectionId

 domain Tracing
   depends on IO

   # Configuration for memory dump. Used only when "memory-infra" category is enabled.
   experimental type MemoryDumpConfig extends object

   type TraceConfig extends object
     properties
       # Controls how the trace buffer stores data.
       experimental optional enum recordMode
         recordUntilFull
         recordContinuously
         recordAsMuchAsPossible
         echoToConsole
       # Size of the trace buffer in kilobytes. If not specified or zero is passed, a default value
       # of 200 MB would be used.
       experimental optional number traceBufferSizeInKb
       # Turns on JavaScript stack sampling.
       experimental optional boolean enableSampling
       # Turns on system tracing.
       experimental optional boolean enableSystrace
       # Turns on argument filter.
       experimental optional boolean enableArgumentFilter
       # Included category filters.
       optional array of string includedCategories
       # Excluded category filters.
       optional array of string excludedCategories
       # Configuration to synthesize the delays in tracing.
       experimental optional array of string syntheticDelays
       # Configuration for memory dump triggers. Used only when "memory-infra" category is enabled.
       experimental optional MemoryDumpConfig memoryDumpConfig

   # Data format of a trace. Can be either the legacy JSON format or the
   # protocol buffer format. Note that the JSON format will be deprecated soon.
   experimental type StreamFormat extends string
     enum
       json
       proto

   # Compression type to use for traces returned via streams.
   experimental type StreamCompression extends string
     enum
       none
       gzip

   # Details exposed when memory request explicitly declared.
   # Keep consistent with memory_dump_request_args.h and
   # memory_instrumentation.mojom
   experimental type MemoryDumpLevelOfDetail extends string
     enum
       background
       light
       detailed

   # Backend type to use for tracing. `chrome` uses the Chrome-integrated
   # tracing service and is supported on all platforms. `system` is only
   # supported on Chrome OS and uses the Perfetto system tracing service.
   # `auto` chooses `system` when the perfettoConfig provided to Tracing.start
   # specifies at least one non-Chrome data source; otherwise uses `chrome`.
   experimental type TracingBackend extends string
     enum
       auto
       chrome
       system

   # Stop trace events collection.
   command end

   # Gets supported tracing categories.
   experimental command getCategories
     returns
       # A list of supported tracing categories.
       array of string categories

   # Record a clock sync marker in the trace.
   experimental command recordClockSyncMarker
     parameters
       # The ID of this clock sync marker
       string syncId

   # Request a global memory dump.
   experimental command requestMemoryDump
     parameters
       # Enables more deterministic results by forcing garbage collection
       optional boolean deterministic
       # Specifies level of details in memory dump. Defaults to "detailed".
       optional MemoryDumpLevelOfDetail levelOfDetail
     returns
       # GUID of the resulting global memory dump.
       string dumpGuid
       # True iff the global memory dump succeeded.
       boolean success

   # Start trace events collection.
   command start
     parameters
       # Category/tag filter
       experimental deprecated optional string categories
       # Tracing options
       experimental deprecated optional string options
       # If set, the agent will issue bufferUsage events at this interval, specified in milliseconds
       experimental optional number bufferUsageReportingInterval
       # Whether to report trace events as series of dataCollected events or to save trace to a
       # stream (defaults to `ReportEvents`).
       optional enum transferMode
         ReportEvents
         ReturnAsStream
       # Trace data format to use. This only applies when using `ReturnAsStream`
       # transfer mode (defaults to `json`).
       optional StreamFormat streamFormat
       # Compression format to use. This only applies when using `ReturnAsStream`
       # transfer mode (defaults to `none`)
       experimental optional StreamCompression streamCompression
       optional TraceConfig traceConfig
       # Base64-encoded serialized perfetto.protos.TraceConfig protobuf message
       # When specified, the parameters `categories`, `options`, `traceConfig`
       # are ignored.
       experimental optional binary perfettoConfig
       # Backend type (defaults to `auto`)
       experimental optional TracingBackend tracingBackend

   experimental event bufferUsage
     parameters
       # A number in range [0..1] that indicates the used size of event buffer as a fraction of its
       # total size.
       optional number percentFull
       # An approximate number of events in the trace log.
       optional number eventCount
       # A number in range [0..1] that indicates the used size of event buffer as a fraction of its
       # total size.
       optional number value

   # Contains a bucket of collected trace events. When tracing is stopped collected events will be
   # sent as a sequence of dataCollected events followed by tracingComplete event.
   experimental event dataCollected
     parameters
       array of object value

   # Signals that tracing is stopped and there is no trace buffers pending flush, all data were
   # delivered via dataCollected events.
   event tracingComplete
     parameters
       # Indicates whether some trace data is known to have been lost, e.g. because the trace ring
       # buffer wrapped around.
       boolean dataLossOccurred
       # A handle of the stream that holds resulting trace data.
       optional IO.StreamHandle stream
       # Trace data format of returned stream.
       optional StreamFormat traceFormat
       # Compression format of returned stream.
       optional StreamCompression streamCompression

 # A domain for letting clients substitute browser's network layer with client code.
 domain Fetch
   depends on Network
   depends on IO
   depends on Page

   # Unique request identifier.
   # Note that this does not identify individual HTTP requests that are part of
   # a network request.
   type RequestId extends string

   # Stages of the request to handle. Request will intercept before the request is
   # sent. Response will intercept after the response is received (but before response
   # body is received).
   type RequestStage extends string
     enum
       Request
       Response

   type RequestPattern extends object
     properties
       # Wildcards (`'*'` -> zero or more, `'?'` -> exactly one) are allowed. Escape character is
       # backslash. Omitting is equivalent to `"*"`.
       optional string urlPattern
       # If set, only requests for matching resource types will be intercepted.
       optional Network.ResourceType resourceType
       # Stage at which to begin intercepting requests. Default is Request.
       optional RequestStage requestStage

   # Response HTTP header entry
   type HeaderEntry extends object
     properties
       string name
       string value

   # Authorization challenge for HTTP status code 401 or 407.
   type AuthChallenge extends object
     properties
       # Source of the authentication challenge.
       optional enum source
         Server
         Proxy
       # Origin of the challenger.
       string origin
       # The authentication scheme used, such as basic or digest
       string scheme
       # The realm of the challenge. May be empty.
       string realm

   # Response to an AuthChallenge.
   type AuthChallengeResponse extends object
     properties
       # The decision on what to do in response to the authorization challenge.  Default means
       # deferring to the default behavior of the net stack, which will likely either the Cancel
       # authentication or display a popup dialog box.
       enum response
         Default
         CancelAuth
         ProvideCredentials
       # The username to provide, possibly empty. Should only be set if response is
       # ProvideCredentials.
       optional string username
       # The password to provide, possibly empty. Should only be set if response is
       # ProvideCredentials.
       optional string password

   # Disables the fetch domain.
   command disable

   # Enables issuing of requestPaused events. A request will be paused until client
   # calls one of failRequest, fulfillRequest or continueRequest/continueWithAuth.
   command enable
     parameters
       # If specified, only requests matching any of these patterns will produce
       # fetchRequested event and will be paused until clients response. If not set,
       # all requests will be affected.
       optional array of RequestPattern patterns
       # If true, authRequired events will be issued and requests will be paused
       # expecting a call to continueWithAuth.
       optional boolean handleAuthRequests

   # Causes the request to fail with specified reason.
   command failRequest
     parameters
       # An id the client received in requestPaused event.
       RequestId requestId
       # Causes the request to fail with the given reason.
       Network.ErrorReason errorReason

   # Provides response to the request.
   command fulfillRequest
     parameters
       # An id the client received in requestPaused event.
       RequestId requestId
       # An HTTP response code.
       integer responseCode
       # Response headers.
       optional array of HeaderEntry responseHeaders
       # Alternative way of specifying response headers as a \0-separated
       # series of name: value pairs. Prefer the above method unless you
       # need to represent some non-UTF8 values that can't be transmitted
       # over the protocol as text.
       optional binary binaryResponseHeaders
       # A response body. If absent, original response body will be used if
       # the request is intercepted at the response stage and empty body
       # will be used if the request is intercepted at the request stage.
       optional binary body
       # A textual representation of responseCode.
       # If absent, a standard phrase matching responseCode is used.
       optional string responsePhrase

   # Continues the request, optionally modifying some of its parameters.
   command continueRequest
     parameters
       # An id the client received in requestPaused event.
       RequestId requestId
       # If set, the request url will be modified in a way that's not observable by page.
       optional string url
       # If set, the request method is overridden.
       optional string method
       # If set, overrides the post data in the request.
       optional binary postData
       # If set, overrides the request headers. Note that the overrides do not
       # extend to subsequent redirect hops, if a redirect happens. Another override
       # may be applied to a different request produced by a redirect.
       optional array of HeaderEntry headers
       # If set, overrides response interception behavior for this request.
       experimental optional boolean interceptResponse

   # Continues a request supplying authChallengeResponse following authRequired event.
   command continueWithAuth
     parameters
       # An id the client received in authRequired event.
       RequestId requestId
       # Response to  with an authChallenge.
       AuthChallengeResponse authChallengeResponse

   # Continues loading of the paused response, optionally modifying the
   # response headers. If either responseCode or headers are modified, all of them
   # must be present.
   experimental command continueResponse
     parameters
       # An id the client received in requestPaused event.
       RequestId requestId
       # An HTTP response code. If absent, original response code will be used.
       optional integer responseCode
       # A textual representation of responseCode.
       # If absent, a standard phrase matching responseCode is used.
       optional string responsePhrase
       # Response headers. If absent, original response headers will be used.
       optional array of HeaderEntry responseHeaders
       # Alternative way of specifying response headers as a \0-separated
       # series of name: value pairs. Prefer the above method unless you
       # need to represent some non-UTF8 values that can't be transmitted
       # over the protocol as text.
       optional binary binaryResponseHeaders

   # Causes the body of the response to be received from the server and
   # returned as a single string. May only be issued for a request that
   # is paused in the Response stage and is mutually exclusive with
   # takeResponseBodyForInterceptionAsStream. Calling other methods that
   # affect the request or disabling fetch domain before body is received
   # results in an undefined behavior.
   # Note that the response body is not available for redirects. Requests
   # paused in the _redirect received_ state may be differentiated by
   # `responseCode` and presence of `location` response header, see
   # comments to `requestPaused` for details.
   command getResponseBody
     parameters
       # Identifier for the intercepted request to get body for.
       RequestId requestId
     returns
       # Response body.
       string body
       # True, if content was sent as base64.
       boolean base64Encoded

   # Returns a handle to the stream representing the response body.
   # The request must be paused in the HeadersReceived stage.
   # Note that after this command the request can't be continued
   # as is -- client either needs to cancel it or to provide the
   # response body.
   # The stream only supports sequential read, IO.read will fail if the position
   # is specified.
   # This method is mutually exclusive with getResponseBody.
   # Calling other methods that affect the request or disabling fetch
   # domain before body is received results in an undefined behavior.
   command takeResponseBodyAsStream
     parameters
       RequestId requestId
     returns
       IO.StreamHandle stream

   # Issued when the domain is enabled and the request URL matches the
   # specified filter. The request is paused until the client responds
   # with one of continueRequest, failRequest or fulfillRequest.
   # The stage of the request can be determined by presence of responseErrorReason
   # and responseStatusCode -- the request is at the response stage if either
   # of these fields is present and in the request stage otherwise.
   # Redirect responses and subsequent requests are reported similarly to regular
   # responses and requests. Redirect responses may be distinguished by the value
   # of `responseStatusCode` (which is one of 301, 302, 303, 307, 308) along with
   # presence of the `location` header. Requests resulting from a redirect will
   # have `redirectedRequestId` field set.
   event requestPaused
     parameters
       # Each request the page makes will have a unique id.
       RequestId requestId
       # The details of the request.
       Network.Request request
       # The id of the frame that initiated the request.
       Page.FrameId frameId
       # How the requested resource will be used.
       Network.ResourceType resourceType
       # Response error if intercepted at response stage.
       optional Network.ErrorReason responseErrorReason
       # Response code if intercepted at response stage.
       optional integer responseStatusCode
       # Response status text if intercepted at response stage.
       optional string responseStatusText
       # Response headers if intercepted at the response stage.
       optional array of HeaderEntry responseHeaders
       # If the intercepted request had a corresponding Network.requestWillBeSent event fired for it,
       # then this networkId will be the same as the requestId present in the requestWillBeSent event.
       optional Network.RequestId networkId
       # If the request is due to a redirect response from the server, the id of the request that
       # has caused the redirect.
       experimental optional RequestId redirectedRequestId

   # Issued when the domain is enabled with handleAuthRequests set to true.
   # The request is paused until client responds with continueWithAuth.
   event authRequired
     parameters
       # Each request the page makes will have a unique id.
       RequestId requestId
       # The details of the request.
       Network.Request request
       # The id of the frame that initiated the request.
       Page.FrameId frameId
       # How the requested resource will be used.
       Network.ResourceType resourceType
       # Details of the Authorization Challenge encountered.
       # If this is set, client should respond with continueRequest that
       # contains AuthChallengeResponse.
       AuthChallenge authChallenge

 # This domain allows inspection of Web Audio API.
 # https://webaudio.github.io/web-audio-api/
 experimental domain WebAudio

   # An unique ID for a graph object (AudioContext, AudioNode, AudioParam) in Web Audio API
   type GraphObjectId extends string

   # Enum of BaseAudioContext types
   type ContextType extends string
     enum
       realtime
       offline

   # Enum of AudioContextState from the spec
   type ContextState extends string
     enum
       suspended
       running
       closed
       interrupted

   # Enum of AudioNode types
   type NodeType extends string

   # Enum of AudioNode::ChannelCountMode from the spec
   type ChannelCountMode extends string
     enum
       clamped-max
       explicit
       max

   # Enum of AudioNode::ChannelInterpretation from the spec
   type ChannelInterpretation extends string
     enum
       discrete
       speakers

   # Enum of AudioParam types
   type ParamType extends string

   # Enum of AudioParam::AutomationRate from the spec
   type AutomationRate extends string
     enum
       a-rate
       k-rate

   # Fields in AudioContext that change in real-time.
   type ContextRealtimeData extends object
     properties
       # The current context time in second in BaseAudioContext.
       number currentTime
       # The time spent on rendering graph divided by render quantum duration,
       # and multiplied by 100. 100 means the audio renderer reached the full
       # capacity and glitch may occur.
       number renderCapacity
       # A running mean of callback interval.
       number callbackIntervalMean
       # A running variance of callback interval.
       number callbackIntervalVariance

   # Protocol object for BaseAudioContext
   type BaseAudioContext extends object
     properties
       GraphObjectId contextId
       ContextType contextType
       ContextState contextState
       optional ContextRealtimeData realtimeData
       # Platform-dependent callback buffer size.
       number callbackBufferSize
       # Number of output channels supported by audio hardware in use.
       number maxOutputChannelCount
       # Context sample rate.
       number sampleRate

 # Protocol object for AudioListener
   type AudioListener extends object
     properties
       GraphObjectId listenerId
       GraphObjectId contextId

   # Protocol object for AudioNode
   type AudioNode extends object
     properties
       GraphObjectId nodeId
       GraphObjectId contextId
       NodeType nodeType
       number numberOfInputs
       number numberOfOutputs
       number channelCount
       ChannelCountMode channelCountMode
       ChannelInterpretation channelInterpretation

   # Protocol object for AudioParam
   type AudioParam extends object
     properties
       GraphObjectId paramId
       GraphObjectId nodeId
       GraphObjectId contextId
       ParamType paramType
       AutomationRate rate
       number defaultValue
       number minValue
       number maxValue

   # Enables the WebAudio domain and starts sending context lifetime events.
   command enable

   # Disables the WebAudio domain.
   command disable

   # Fetch the realtime data from the registered contexts.
   command getRealtimeData
     parameters
       GraphObjectId contextId
     returns
       ContextRealtimeData realtimeData

   # Notifies that a new BaseAudioContext has been created.
   event contextCreated
     parameters
       BaseAudioContext context

   # Notifies that an existing BaseAudioContext will be destroyed.
   event contextWillBeDestroyed
     parameters
       GraphObjectId contextId

   # Notifies that existing BaseAudioContext has changed some properties (id stays the same)..
   event contextChanged
     parameters
       BaseAudioContext context

 # Notifies that the construction of an AudioListener has finished.
   event audioListenerCreated
     parameters
       AudioListener listener

   # Notifies that a new AudioListener has been created.
   event audioListenerWillBeDestroyed
     parameters
       GraphObjectId contextId
       GraphObjectId listenerId

   # Notifies that a new AudioNode has been created.
   event audioNodeCreated
     parameters
       AudioNode node

   # Notifies that an existing AudioNode has been destroyed.
   event audioNodeWillBeDestroyed
     parameters
       GraphObjectId contextId
       GraphObjectId nodeId

   # Notifies that a new AudioParam has been created.
   event audioParamCreated
     parameters
       AudioParam param

   # Notifies that an existing AudioParam has been destroyed.
   event audioParamWillBeDestroyed
     parameters
       GraphObjectId contextId
       GraphObjectId nodeId
       GraphObjectId paramId

   # Notifies that two AudioNodes are connected.
   event nodesConnected
     parameters
       GraphObjectId contextId
       GraphObjectId sourceId
       GraphObjectId destinationId
       optional number sourceOutputIndex
       optional number destinationInputIndex

   # Notifies that AudioNodes are disconnected. The destination can be null, and it means all the outgoing connections from the source are disconnected.
   event nodesDisconnected
     parameters
       GraphObjectId contextId
       GraphObjectId sourceId
       GraphObjectId destinationId
       optional number sourceOutputIndex
       optional number destinationInputIndex

   # Notifies that an AudioNode is connected to an AudioParam.
   event nodeParamConnected
     parameters
       GraphObjectId contextId
       GraphObjectId sourceId
       GraphObjectId destinationId
       optional number sourceOutputIndex

   # Notifies that an AudioNode is disconnected to an AudioParam.
   event nodeParamDisconnected
     parameters
       GraphObjectId contextId
       GraphObjectId sourceId
       GraphObjectId destinationId
       optional number sourceOutputIndex

 # This domain allows configuring virtual authenticators to test the WebAuthn
 # API.
 experimental domain WebAuthn
   type AuthenticatorId extends string

   type AuthenticatorProtocol extends string
     enum
       # Universal 2nd Factor.
       u2f
       # Client To Authenticator Protocol 2.
       ctap2

   type Ctap2Version extends string
     enum
       ctap2_0
       ctap2_1

   type AuthenticatorTransport extends string
     enum
       # Cross-Platform authenticator attachments:
       usb
       nfc
       ble
       cable
       # Platform authenticator attachment:
       internal

   type VirtualAuthenticatorOptions extends object
     properties
       AuthenticatorProtocol protocol
       # Defaults to ctap2_0. Ignored if |protocol| == u2f.
       optional Ctap2Version ctap2Version
       AuthenticatorTransport transport
       # Defaults to false.
       optional boolean hasResidentKey
       # Defaults to false.
       optional boolean hasUserVerification
       # If set to true, the authenticator will support the largeBlob extension.
       # https://w3c.github.io/webauthn#largeBlob
       # Defaults to false.
       optional boolean hasLargeBlob
       # If set to true, the authenticator will support the credBlob extension.
       # https://fidoalliance.org/specs/fido-v2.1-rd-20201208/fido-client-to-authenticator-protocol-v2.1-rd-20201208.html#sctn-credBlob-extension
       # Defaults to false.
       optional boolean hasCredBlob
       # If set to true, the authenticator will support the minPinLength extension.
       # https://fidoalliance.org/specs/fido-v2.1-ps-20210615/fido-client-to-authenticator-protocol-v2.1-ps-20210615.html#sctn-minpinlength-extension
       # Defaults to false.
       optional boolean hasMinPinLength
       # If set to true, the authenticator will support the prf extension.
       # https://w3c.github.io/webauthn/#prf-extension
       # Defaults to false.
       optional boolean hasPrf
       # If set to true, tests of user presence will succeed immediately.
       # Otherwise, they will not be resolved. Defaults to true.
       optional boolean automaticPresenceSimulation
       # Sets whether User Verification succeeds or fails for an authenticator.
       # Defaults to false.
       optional boolean isUserVerified
       # Credentials created by this authenticator will have the backup
       # eligibility (BE) flag set to this value. Defaults to false.
       # https://w3c.github.io/webauthn/#sctn-credential-backup
       optional boolean defaultBackupEligibility
       # Credentials created by this authenticator will have the backup state
       # (BS) flag set to this value. Defaults to false.
       # https://w3c.github.io/webauthn/#sctn-credential-backup
       optional boolean defaultBackupState

   type Credential extends object
     properties
       binary credentialId
       boolean isResidentCredential
       # Relying Party ID the credential is scoped to. Must be set when adding a
       # credential.
       optional string rpId
       # The ECDSA P-256 private key in PKCS#8 format.
       binary privateKey
       # An opaque byte sequence with a maximum size of 64 bytes mapping the
       # credential to a specific user.
       optional binary userHandle
       # Signature counter. This is incremented by one for each successful
       # assertion.
       # See https://w3c.github.io/webauthn/#signature-counter
       integer signCount
       # The large blob associated with the credential.
       # See https://w3c.github.io/webauthn/#sctn-large-blob-extension
       optional binary largeBlob
       # Assertions returned by this credential will have the backup eligibility
       # (BE) flag set to this value. Defaults to the authenticator's
       # defaultBackupEligibility value.
       optional boolean backupEligibility
       # Assertions returned by this credential will have the backup state (BS)
       # flag set to this value. Defaults to the authenticator's
       # defaultBackupState value.
       optional boolean backupState
       # The credential's user.name property. Equivalent to empty if not set.
       # https://w3c.github.io/webauthn/#dom-publickeycredentialentity-name
       optional string userName
       # The credential's user.displayName property. Equivalent to empty if
       # not set.
       # https://w3c.github.io/webauthn/#dom-publickeycredentialuserentity-displayname
       optional string userDisplayName

   # Enable the WebAuthn domain and start intercepting credential storage and
   # retrieval with a virtual authenticator.
   command enable
     parameters
       # Whether to enable the WebAuthn user interface. Enabling the UI is
       # recommended for debugging and demo purposes, as it is closer to the real
       # experience. Disabling the UI is recommended for automated testing.
       # Supported at the embedder's discretion if UI is available.
       # Defaults to false.
       optional boolean enableUI

   # Disable the WebAuthn domain.
   command disable

   # Creates and adds a virtual authenticator.
   command addVirtualAuthenticator
     parameters
       VirtualAuthenticatorOptions options
     returns
       AuthenticatorId authenticatorId

   # Resets parameters isBogusSignature, isBadUV, isBadUP to false if they are not present.
   command setResponseOverrideBits
     parameters
       AuthenticatorId authenticatorId
       # If isBogusSignature is set, overrides the signature in the authenticator response to be zero.
       # Defaults to false.
       optional boolean isBogusSignature
       # If isBadUV is set, overrides the UV bit in the flags in the authenticator response to
       # be zero. Defaults to false.
       optional boolean isBadUV
       # If isBadUP is set, overrides the UP bit in the flags in the authenticator response to
       # be zero. Defaults to false.
       optional boolean isBadUP

   # Removes the given authenticator.
   command removeVirtualAuthenticator
     parameters
       AuthenticatorId authenticatorId

   # Adds the credential to the specified authenticator.
   command addCredential
     parameters
       AuthenticatorId authenticatorId
       Credential credential

   # Returns a single credential stored in the given virtual authenticator that
   # matches the credential ID.
   command getCredential
     parameters
       AuthenticatorId authenticatorId
       binary credentialId
     returns
       Credential credential

   # Returns all the credentials stored in the given virtual authenticator.
   command getCredentials
     parameters
       AuthenticatorId authenticatorId
     returns
       array of Credential credentials

   # Removes a credential from the authenticator.
   command removeCredential
     parameters
       AuthenticatorId authenticatorId
       binary credentialId

   # Clears all the credentials from the specified device.
   command clearCredentials
     parameters
       AuthenticatorId authenticatorId

   # Sets whether User Verification succeeds or fails for an authenticator.
   # The default is true.
   command setUserVerified
     parameters
       AuthenticatorId authenticatorId
       boolean isUserVerified

   # Sets whether tests of user presence will succeed immediately (if true) or fail to resolve (if false) for an authenticator.
   # The default is true.
   command setAutomaticPresenceSimulation
     parameters
       AuthenticatorId authenticatorId
       boolean enabled

   # Allows setting credential properties.
   # https://w3c.github.io/webauthn/#sctn-automation-set-credential-properties
   command setCredentialProperties
     parameters
       AuthenticatorId authenticatorId
       binary credentialId
       optional boolean backupEligibility
       optional boolean backupState

   # Triggered when a credential is added to an authenticator.
   event credentialAdded
     parameters
       AuthenticatorId authenticatorId
       Credential credential

   # Triggered when a credential is deleted, e.g. through
   # PublicKeyCredential.signalUnknownCredential().
   event credentialDeleted
     parameters
       AuthenticatorId authenticatorId
       binary credentialId

   # Triggered when a credential is updated, e.g. through
   # PublicKeyCredential.signalCurrentUserDetails().
   event credentialUpdated
     parameters
       AuthenticatorId authenticatorId
       Credential credential

   # Triggered when a credential is used in a webauthn assertion.
   event credentialAsserted
     parameters
       AuthenticatorId authenticatorId
       Credential credential

 # This domain allows detailed inspection of media elements
 experimental domain Media

   # Players will get an ID that is unique within the agent context.
   type PlayerId extends string

   type Timestamp extends number

   # Have one type per entry in MediaLogRecord::Type
   # Corresponds to kMessage
   type PlayerMessage extends object
     properties
       # Keep in sync with MediaLogMessageLevel
       # We are currently keeping the message level 'error' separate from the
       # PlayerError type because right now they represent different things,
       # this one being a DVLOG(ERROR) style log message that gets printed
       # based on what log level is selected in the UI, and the other is a
       # representation of a media::PipelineStatus object. Soon however we're
       # going to be moving away from using PipelineStatus for errors and
       # introducing a new error type which should hopefully let us integrate
       # the error log level into the PlayerError type.
       enum level
         error
         warning
         info
         debug
       string message

   # Corresponds to kMediaPropertyChange
   type PlayerProperty extends object
     properties
       string name
       string value

   # Corresponds to kMediaEventTriggered
   type PlayerEvent extends object
     properties
       Timestamp timestamp
       string value

   # Represents logged source line numbers reported in an error.
   # NOTE: file and line are from chromium c++ implementation code, not js.
   type PlayerErrorSourceLocation extends object
     properties
       string file
       integer line

   # Corresponds to kMediaError
   type PlayerError extends object
     properties
       string errorType
       # Code is the numeric enum entry for a specific set of error codes, such
       # as PipelineStatusCodes in media/base/pipeline_status.h
       integer code
       # A trace of where this error was caused / where it passed through.
       array of PlayerErrorSourceLocation stack
       # Errors potentially have a root cause error, ie, a DecoderError might be
       # caused by an WindowsError
       array of PlayerError cause
       # Extra data attached to an error, such as an HRESULT, Video Codec, etc.
       object data

   # This can be called multiple times, and can be used to set / override /
   # remove player properties. A null propValue indicates removal.
   event playerPropertiesChanged
     parameters
       PlayerId playerId
       array of PlayerProperty properties

   # Send events as a list, allowing them to be batched on the browser for less
   # congestion. If batched, events must ALWAYS be in chronological order.
   event playerEventsAdded
     parameters
       PlayerId playerId
       array of PlayerEvent events

   # Send a list of any messages that need to be delivered.
   event playerMessagesLogged
     parameters
       PlayerId playerId
       array of PlayerMessage messages

   # Send a list of any errors that need to be delivered.
   event playerErrorsRaised
     parameters
       PlayerId playerId
       array of PlayerError errors

   # Called whenever a player is created, or when a new agent joins and receives
   # a list of active players. If an agent is restored, it will receive the full
   # list of player ids and all events again.
   event playersCreated
     parameters
       array of PlayerId players

   # Enables the Media domain
   command enable

   # Disables the Media domain.
   command disable

 experimental domain DeviceAccess
   # Device request id.
   type RequestId extends string

   # A device id.
   type DeviceId extends string

   # Device information displayed in a user prompt to select a device.
   type PromptDevice extends object
     properties
       DeviceId id
       # Display name as it appears in a device request user prompt.
       string name

   # Enable events in this domain.
   command enable

   # Disable events in this domain.
   command disable

   # Select a device in response to a DeviceAccess.deviceRequestPrompted event.
   command selectPrompt
     parameters
       RequestId id
       DeviceId deviceId

   # Cancel a prompt in response to a DeviceAccess.deviceRequestPrompted event.
   command cancelPrompt
     parameters
       RequestId id

   # A device request opened a user prompt to select a device. Respond with the
   # selectPrompt or cancelPrompt command.
   event deviceRequestPrompted
     parameters
       RequestId id
       array of PromptDevice devices

 experimental domain Preload
   # Unique id
   type RuleSetId extends string

   # Corresponds to SpeculationRuleSet
   type RuleSet extends object
     properties
       RuleSetId id
       # Identifies a document which the rule set is associated with.
       Network.LoaderId loaderId
       # Source text of JSON representing the rule set. If it comes from
       # `<script>` tag, it is the textContent of the node. Note that it is
       # a JSON for valid case.
       #
       # See also:
       # - https://wicg.github.io/nav-speculation/speculation-rules.html
       # - https://github.com/WICG/nav-speculation/blob/main/triggers.md
       string sourceText
       # A speculation rule set is either added through an inline
       # `<script>` tag or through an external resource via the
       # 'Speculation-Rules' HTTP header. For the first case, we include
       # the BackendNodeId of the relevant `<script>` tag. For the second
       # case, we include the external URL where the rule set was loaded
       # from, and also RequestId if Network domain is enabled.
       #
       # See also:
       # - https://wicg.github.io/nav-speculation/speculation-rules.html#speculation-rules-script
       # - https://wicg.github.io/nav-speculation/speculation-rules.html#speculation-rules-header
       optional DOM.BackendNodeId backendNodeId
       optional string url
       optional Network.RequestId requestId
       # Error information
       # `errorMessage` is null iff `errorType` is null.
       optional RuleSetErrorType errorType
       # TODO(https://crbug.com/1425354): Replace this property with structured error.
       deprecated optional string errorMessage

   type RuleSetErrorType extends string
     enum
       SourceIsNotJsonObject
       InvalidRulesSkipped

   # The type of preloading attempted. It corresponds to
   # mojom::SpeculationAction (although PrefetchWithSubresources is omitted as it
   # isn't being used by clients).
   type SpeculationAction extends string
     enum
       Prefetch
       Prerender

   # Corresponds to mojom::SpeculationTargetHint.
   # See https://github.com/WICG/nav-speculation/blob/main/triggers.md#window-name-targeting-hints
   type SpeculationTargetHint extends string
     enum
       Blank
       Self

   # A key that identifies a preloading attempt.
   #
   # The url used is the url specified by the trigger (i.e. the initial URL), and
   # not the final url that is navigated to. For example, prerendering allows
   # same-origin main frame navigations during the attempt, but the attempt is
   # still keyed with the initial URL.
   type PreloadingAttemptKey extends object
     properties
       Network.LoaderId loaderId
       SpeculationAction action
       string url
       optional SpeculationTargetHint targetHint

   # Lists sources for a preloading attempt, specifically the ids of rule sets
   # that had a speculation rule that triggered the attempt, and the
   # BackendNodeIds of <a href> or <area href> elements that triggered the
   # attempt (in the case of attempts triggered by a document rule). It is
   # possible for multiple rule sets and links to trigger a single attempt.
   type PreloadingAttemptSource extends object
     properties
       PreloadingAttemptKey key
       array of RuleSetId ruleSetIds
       array of DOM.BackendNodeId nodeIds

   # Chrome manages different types of preloads together using a
   # concept of preloading pipeline. For example, if a site uses a
   # SpeculationRules for prerender, Chrome first starts a prefetch and
   # then upgrades it to prerender.
   #
   # CDP events for them are emitted separately but they share
   # `PreloadPipelineId`.
   type PreloadPipelineId extends string

   command enable

   command disable

   # Upsert. Currently, it is only emitted when a rule set added.
   event ruleSetUpdated
     parameters
       RuleSet ruleSet

   event ruleSetRemoved
     parameters
       RuleSetId id

   # List of FinalStatus reasons for Prerender2.
   type PrerenderFinalStatus extends string
     enum
       Activated
       Destroyed
       LowEndDevice
       InvalidSchemeRedirect
       InvalidSchemeNavigation
       NavigationRequestBlockedByCsp
       MojoBinderPolicy
       RendererProcessCrashed
       RendererProcessKilled
       Download
       TriggerDestroyed
       NavigationNotCommitted
       NavigationBadHttpStatus
       ClientCertRequested
       NavigationRequestNetworkError
       CancelAllHostsForTesting
       DidFailLoad
       Stop
       SslCertificateError
       LoginAuthRequested
       UaChangeRequiresReload
       BlockedByClient
       AudioOutputDeviceRequested
       MixedContent
       TriggerBackgrounded
       MemoryLimitExceeded
       DataSaverEnabled
       TriggerUrlHasEffectiveUrl
       ActivatedBeforeStarted
       InactivePageRestriction
       StartFailed
       TimeoutBackgrounded
       CrossSiteRedirectInInitialNavigation
       CrossSiteNavigationInInitialNavigation
       SameSiteCrossOriginRedirectNotOptInInInitialNavigation
       SameSiteCrossOriginNavigationNotOptInInInitialNavigation
       ActivationNavigationParameterMismatch
       ActivatedInBackground
       EmbedderHostDisallowed
       ActivationNavigationDestroyedBeforeSuccess
       TabClosedByUserGesture
       TabClosedWithoutUserGesture
       PrimaryMainFrameRendererProcessCrashed
       PrimaryMainFrameRendererProcessKilled
       ActivationFramePolicyNotCompatible
       PreloadingDisabled
       BatterySaverEnabled
       ActivatedDuringMainFrameNavigation
       PreloadingUnsupportedByWebContents
       CrossSiteRedirectInMainFrameNavigation
       CrossSiteNavigationInMainFrameNavigation
       SameSiteCrossOriginRedirectNotOptInInMainFrameNavigation
       SameSiteCrossOriginNavigationNotOptInInMainFrameNavigation
       MemoryPressureOnTrigger
       MemoryPressureAfterTriggered
       PrerenderingDisabledByDevTools
       SpeculationRuleRemoved
       ActivatedWithAuxiliaryBrowsingContexts
       MaxNumOfRunningEagerPrerendersExceeded
       MaxNumOfRunningNonEagerPrerendersExceeded
       MaxNumOfRunningEmbedderPrerendersExceeded
       PrerenderingUrlHasEffectiveUrl
       RedirectedPrerenderingUrlHasEffectiveUrl
       ActivationUrlHasEffectiveUrl
       JavaScriptInterfaceAdded
       JavaScriptInterfaceRemoved
       AllPrerenderingCanceled
       WindowClosed
       SlowNetwork
       OtherPrerenderedPageActivated
       V8OptimizerDisabled
       PrerenderFailedDuringPrefetch
       BrowsingDataRemoved

   # Fired when a preload enabled state is updated.
   event preloadEnabledStateUpdated
     parameters
       boolean disabledByPreference
       boolean disabledByDataSaver
       boolean disabledByBatterySaver
       boolean disabledByHoldbackPrefetchSpeculationRules
       boolean disabledByHoldbackPrerenderSpeculationRules

   # Preloading status values, see also PreloadingTriggeringOutcome. This
   # status is shared by prefetchStatusUpdated and prerenderStatusUpdated.
   type PreloadingStatus extends string
     enum
       Pending
       Running
       Ready
       Success
       Failure
       # PreloadingTriggeringOutcome which not used by prefetch nor prerender.
       NotSupported

   # TODO(https://crbug.com/1384419): revisit the list of PrefetchStatus and
   # filter out the ones that aren't necessary to the developers.
   type PrefetchStatus extends string
     enum
       # Prefetch is not disabled by PrefetchHeldback.
       PrefetchAllowed
       PrefetchFailedIneligibleRedirect
       PrefetchFailedInvalidRedirect
       PrefetchFailedMIMENotSupported
       PrefetchFailedNetError
       PrefetchFailedNon2XX
       PrefetchEvictedAfterBrowsingDataRemoved
       PrefetchEvictedAfterCandidateRemoved
       PrefetchEvictedForNewerPrefetch
       PrefetchHeldback
       # A previous prefetch to the origin got a HTTP 503 response with an
       # Retry-After header that has no elapsed yet.
       PrefetchIneligibleRetryAfter
       PrefetchIsPrivacyDecoy
       PrefetchIsStale
       PrefetchNotEligibleBrowserContextOffTheRecord
       PrefetchNotEligibleDataSaverEnabled
       PrefetchNotEligibleExistingProxy
       PrefetchNotEligibleHostIsNonUnique
       PrefetchNotEligibleNonDefaultStoragePartition
       PrefetchNotEligibleSameSiteCrossOriginPrefetchRequiredProxy
       PrefetchNotEligibleSchemeIsNotHttps
       PrefetchNotEligibleUserHasCookies
       PrefetchNotEligibleUserHasServiceWorker
       PrefetchNotEligibleUserHasServiceWorkerNoFetchHandler
       PrefetchNotEligibleRedirectFromServiceWorker
       PrefetchNotEligibleRedirectToServiceWorker
       PrefetchNotEligibleBatterySaverEnabled
       PrefetchNotEligiblePreloadingDisabled
       PrefetchNotFinishedInTime
       PrefetchNotStarted
       PrefetchNotUsedCookiesChanged
       PrefetchProxyNotAvailable
       # The response of the prefetch is used for the next navigation. This is
       # the final successful state.
       PrefetchResponseUsed
       # The prefetch finished successfully but was never used.
       PrefetchSuccessfulButNotUsed
       PrefetchNotUsedProbeFailed

   # Fired when a prefetch attempt is updated.
   event prefetchStatusUpdated
     parameters
       PreloadingAttemptKey key
       PreloadPipelineId pipelineId
       # The frame id of the frame initiating prefetch.
       Page.FrameId initiatingFrameId
       string prefetchUrl
       PreloadingStatus status
       PrefetchStatus prefetchStatus
       Network.RequestId requestId

   # Information of headers to be displayed when the header mismatch occurred.
   type PrerenderMismatchedHeaders extends object
     properties
       string headerName
       optional string initialValue
       optional string activationValue

   # Fired when a prerender attempt is updated.
   event prerenderStatusUpdated
     parameters
       PreloadingAttemptKey key
       PreloadPipelineId pipelineId
       PreloadingStatus status
       optional PrerenderFinalStatus prerenderStatus
       # This is used to give users more information about the name of Mojo interface
       # that is incompatible with prerender and has caused the cancellation of the attempt.
       optional string disallowedMojoInterface
       optional array of PrerenderMismatchedHeaders mismatchedHeaders

   # Send a list of sources for all preloading attempts in a document.
   event preloadingAttemptSourcesUpdated
     parameters
       Network.LoaderId loaderId
       array of PreloadingAttemptSource preloadingAttemptSources

 # This domain allows interacting with the FedCM dialog.
 experimental domain FedCm
   # Whether this is a sign-up or sign-in action for this account, i.e.
   # whether this account has ever been used to sign in to this RP before.
   type LoginState extends string
     enum
       SignIn
       SignUp

   # The types of FedCM dialogs.
   type DialogType extends string
     enum
       AccountChooser
       AutoReauthn
       ConfirmIdpLogin
       Error

   # The buttons on the FedCM dialog.
   type DialogButton extends string
     enum
       ConfirmIdpLoginContinue
       ErrorGotIt
       ErrorMoreDetails

   # The URLs that each account has
   type AccountUrlType extends string
     enum
       TermsOfService
       PrivacyPolicy

   # Corresponds to IdentityRequestAccount
   type Account extends object
     properties
       string accountId
       string email
       string name
       string givenName
       string pictureUrl
       string idpConfigUrl
       string idpLoginUrl
       LoginState loginState
       # These two are only set if the loginState is signUp
       optional string termsOfServiceUrl
       optional string privacyPolicyUrl

   event dialogShown
     parameters
       string dialogId
       DialogType dialogType
       array of Account accounts
       # These exist primarily so that the caller can verify the
       # RP context was used appropriately.
       string title
       optional string subtitle

   # Triggered when a dialog is closed, either by user action, JS abort,
   # or a command below.
   event dialogClosed
     parameters
       string dialogId

   command enable
     parameters
       # Allows callers to disable the promise rejection delay that would
       # normally happen, if this is unimportant to what's being tested.
       # (step 4 of https://fedidcg.github.io/FedCM/#browser-api-rp-sign-in)
       optional boolean disableRejectionDelay

   command disable

   command selectAccount
     parameters
       string dialogId
       integer accountIndex

   command clickDialogButton
     parameters
       string dialogId
       DialogButton dialogButton

   command openUrl
     parameters
       string dialogId
       integer accountIndex
       AccountUrlType accountUrlType

   command dismissDialog
     parameters
       string dialogId
       optional boolean triggerCooldown

   # Resets the cooldown time, if any, to allow the next FedCM call to show
   # a dialog even if one was recently dismissed by the user.
   command resetCooldown

 # This domain allows interacting with the browser to control PWAs.
 experimental domain PWA

   # The following types are the replica of
   # https://crsrc.org/c/chrome/browser/web_applications/proto/web_app_os_integration_state.proto;drc=9910d3be894c8f142c977ba1023f30a656bc13fc;l=67
   type FileHandlerAccept extends object
     properties
       # New name of the mimetype according to
       # https://www.iana.org/assignments/media-types/media-types.xhtml
       string mediaType
       array of string fileExtensions

   type FileHandler extends object
     properties
       string action
       array of FileHandlerAccept accepts
       string displayName

   # Returns the following OS state for the given manifest id.
   command getOsAppState
     parameters
       # The id from the webapp's manifest file, commonly it's the url of the
       # site installing the webapp. See
       # https://web.dev/learn/pwa/web-app-manifest.
       string manifestId
     returns
       integer badgeCount
       array of FileHandler fileHandlers

   # Installs the given manifest identity, optionally using the given install_url
   # or IWA bundle location.
   #
   # TODO(crbug.com/337872319) Support IWA to meet the following specific
   # requirement.
   # IWA-specific install description: If the manifest_id is isolated-app://,
   # install_url_or_bundle_url is required, and can be either an http(s) URL or
   # file:// URL pointing to a signed web bundle (.swbn). The .swbn file's
   # signing key must correspond to manifest_id. If Chrome is not in IWA dev
   # mode, the installation will fail, regardless of the state of the allowlist.
   command install
     parameters
       string manifestId
       # The location of the app or bundle overriding the one derived from the
       # manifestId.
       optional string installUrlOrBundleUrl

   # Uninstalls the given manifest_id and closes any opened app windows.
   command uninstall
     parameters
       string manifestId

   # Launches the installed web app, or an url in the same web app instead of the
   # default start url if it is provided. Returns a page Target.TargetID which
   # can be used to attach to via Target.attachToTarget or similar APIs.
   command launch
     parameters
       string manifestId
       optional string url
     returns
       # ID of the tab target created as a result.
       Target.TargetID targetId

   # Opens one or more local files from an installed web app identified by its
   # manifestId. The web app needs to have file handlers registered to process
   # the files. The API returns one or more page Target.TargetIDs which can be
   # used to attach to via Target.attachToTarget or similar APIs.
   # If some files in the parameters cannot be handled by the web app, they will
   # be ignored. If none of the files can be handled, this API returns an error.
   # If no files are provided as the parameter, this API also returns an error.
   #
   # According to the definition of the file handlers in the manifest file, one
   # Target.TargetID may represent a page handling one or more files. The order
   # of the returned Target.TargetIDs is not guaranteed.
   #
   # TODO(crbug.com/339454034): Check the existences of the input files.
   command launchFilesInApp
     parameters
       string manifestId
       array of string files
     returns
       # IDs of the tab targets created as the result.
       array of Target.TargetID targetIds

   # Opens the current page in its web app identified by the manifest id, needs
   # to be called on a page target. This function returns immediately without
   # waiting for the app to finish loading.
   command openCurrentPageInApp
     parameters
       string manifestId

   # If user prefers opening the app in browser or an app window.
   type DisplayMode extends string
     enum
       standalone
       browser

   # Changes user settings of the web app identified by its manifestId. If the
   # app was not installed, this command returns an error. Unset parameters will
   # be ignored; unrecognized values will cause an error.
   #
   # Unlike the ones defined in the manifest files of the web apps, these
   # settings are provided by the browser and controlled by the users, they
   # impact the way the browser handling the web apps.
   #
   # See the comment of each parameter.
   command changeAppUserSettings
     parameters
       string manifestId
       # If user allows the links clicked on by the user in the app's scope, or
       # extended scope if the manifest has scope extensions and the flags
       # `DesktopPWAsLinkCapturingWithScopeExtensions` and
       # `WebAppEnableScopeExtensions` are enabled.
       #
       # Note, the API does not support resetting the linkCapturing to the
       # initial value, uninstalling and installing the web app again will reset
       # it.
       #
       # TODO(crbug.com/339453269): Setting this value on ChromeOS is not
       # supported yet.
       optional boolean linkCapturing
       optional DisplayMode displayMode

 # This domain allows configuring virtual Bluetooth devices to test
 # the web-bluetooth API.
 experimental domain BluetoothEmulation
   # Indicates the various states of Central.
   type CentralState extends string
     enum
       absent
       powered-off
       powered-on

   # Indicates the various types of GATT event.
   type GATTOperationType extends string
     enum
       connection
       discovery

   # Indicates the various types of characteristic write.
   type CharacteristicWriteType extends string
     enum
       write-default-deprecated
       write-with-response
       write-without-response

   # Indicates the various types of characteristic operation.
   type CharacteristicOperationType extends string
     enum
       read
       write
       subscribe-to-notifications
       unsubscribe-from-notifications

   # Indicates the various types of descriptor operation.
   type DescriptorOperationType extends string
     enum
       read
       write

   # Stores the manufacturer data
   type ManufacturerData extends object
     properties
       # Company identifier
       # https://bitbucket.org/bluetooth-SIG/public/src/main/assigned_numbers/company_identifiers/company_identifiers.yaml
       # https://usb.org/developers
       integer key
       # Manufacturer-specific data
       binary data

   # Stores the byte data of the advertisement packet sent by a Bluetooth device.
   type ScanRecord extends object
     properties
       optional string name
       optional array of string uuids
       # Stores the external appearance description of the device.
       optional integer appearance
       # Stores the transmission power of a broadcasting device.
       optional integer txPower
       # Key is the company identifier and the value is an array of bytes of
       # manufacturer specific data.
       optional array of ManufacturerData manufacturerData

   # Stores the advertisement packet information that is sent by a Bluetooth device.
   type ScanEntry extends object
     properties
       string deviceAddress
       integer rssi
       ScanRecord scanRecord

   # Describes the properties of a characteristic. This follows Bluetooth Core
   # Specification BT 4.2 Vol 3 Part G 3.3.1. Characteristic Properties.
   type CharacteristicProperties extends object
     properties
       optional boolean broadcast
       optional boolean read
       optional boolean writeWithoutResponse
       optional boolean write
       optional boolean notify
       optional boolean indicate
       optional boolean authenticatedSignedWrites
       optional boolean extendedProperties

   # Enable the BluetoothEmulation domain.
   command enable
     parameters
       # State of the simulated central.
       CentralState state
       # If the simulated central supports low-energy.
       boolean leSupported

   # Set the state of the simulated central.
   command setSimulatedCentralState
     parameters
       # State of the simulated central.
       CentralState state

   # Disable the BluetoothEmulation domain.
   command disable

   # Simulates a peripheral with |address|, |name| and |knownServiceUuids|
   # that has already been connected to the system.
   command simulatePreconnectedPeripheral
     parameters
       string address
       string name
       array of ManufacturerData manufacturerData
       array of string knownServiceUuids

   # Simulates an advertisement packet described in |entry| being received by
   # the central.
   command simulateAdvertisement
     parameters
       ScanEntry entry

   # Simulates the response code from the peripheral with |address| for a
   # GATT operation of |type|. The |code| value follows the HCI Error Codes from
   # Bluetooth Core Specification Vol 2 Part D 1.3 List Of Error Codes.
   command simulateGATTOperationResponse
     parameters
       string address
       GATTOperationType type
       integer code

   # Simulates the response from the characteristic with |characteristicId| for a
   # characteristic operation of |type|. The |code| value follows the Error
   # Codes from Bluetooth Core Specification Vol 3 Part F 3.4.1.1 Error Response.
   # The |data| is expected to exist when simulating a successful read operation
   # response.
   command simulateCharacteristicOperationResponse
     parameters
       string characteristicId
       CharacteristicOperationType type
       integer code
       optional binary data

   # Simulates the response from the descriptor with |descriptorId| for a
   # descriptor operation of |type|. The |code| value follows the Error
   # Codes from Bluetooth Core Specification Vol 3 Part F 3.4.1.1 Error Response.
   # The |data| is expected to exist when simulating a successful read operation
   # response.
   command simulateDescriptorOperationResponse
     parameters
       string descriptorId
       DescriptorOperationType type
       integer code
       optional binary data

   # Adds a service with |serviceUuid| to the peripheral with |address|.
   command addService
     parameters
       string address
       string serviceUuid
     returns
       # An identifier that uniquely represents this service.
       string serviceId

   # Removes the service respresented by |serviceId| from the simulated central.
   command removeService
     parameters
       string serviceId

   # Adds a characteristic with |characteristicUuid| and |properties| to the
   # service represented by |serviceId|.
   command addCharacteristic
     parameters
       string serviceId
       string characteristicUuid
       CharacteristicProperties properties
     returns
       # An identifier that uniquely represents this characteristic.
       string characteristicId

   # Removes the characteristic respresented by |characteristicId| from the
   # simulated central.
   command removeCharacteristic
     parameters
       string characteristicId

   # Adds a descriptor with |descriptorUuid| to the characteristic respresented
   # by |characteristicId|.
   command addDescriptor
     parameters
       string characteristicId
       string descriptorUuid
     returns
       # An identifier that uniquely represents this descriptor.
       string descriptorId

   # Removes the descriptor with |descriptorId| from the simulated central.
   command removeDescriptor
     parameters
       string descriptorId

   # Simulates a GATT disconnection from the peripheral with |address|.
   command simulateGATTDisconnection
     parameters
       string address

   # Event for when a GATT operation of |type| to the peripheral with |address|
   # happened.
   event gattOperationReceived
     parameters
       string address
       GATTOperationType type

   # Event for when a characteristic operation of |type| to the characteristic
   # respresented by |characteristicId| happened. |data| and |writeType| is
   # expected to exist when |type| is write.
   event characteristicOperationReceived
     parameters
       string characteristicId
       CharacteristicOperationType type
       optional binary data
       optional CharacteristicWriteType writeType

   # Event for when a descriptor operation of |type| to the descriptor
   # respresented by |descriptorId| happened. |data| is expected to exist when
   # |type| is write.
   event descriptorOperationReceived
     parameters
       string descriptorId
       CharacteristicOperationType type
       optional binary data