Source Code: lib/url.js
\nThe url module provides utilities for URL resolution and parsing. It can be\naccessed using:
import url from 'url';\nconst url = require('url');\nA URL string is a structured string containing multiple meaningful components.\nWhen parsed, a URL object is returned containing properties for each of these\ncomponents.
\nThe url module provides two APIs for working with URLs: a legacy API that is\nNode.js specific, and a newer API that implements the same\nWHATWG URL Standard used by web browsers.
A comparison between the WHATWG and Legacy APIs is provided below. Above the URL\n'https://user:pass@sub.example.com:8080/p/a/t/h?query=string#hash', properties\nof an object returned by the legacy url.parse() are shown. Below it are\nproperties of a WHATWG URL object.
WHATWG URL's origin property includes protocol and host, but not\nusername or password.
┌────────────────────────────────────────────────────────────────────────────────────────────────┐\n│ href │\n├──────────┬──┬─────────────────────┬────────────────────────┬───────────────────────────┬───────┤\n│ protocol │ │ auth │ host │ path │ hash │\n│ │ │ ├─────────────────┬──────┼──────────┬────────────────┤ │\n│ │ │ │ hostname │ port │ pathname │ search │ │\n│ │ │ │ │ │ ├─┬──────────────┤ │\n│ │ │ │ │ │ │ │ query │ │\n\" https: // user : pass @ sub.example.com : 8080 /p/a/t/h ? query=string #hash \"\n│ │ │ │ │ hostname │ port │ │ │ │\n│ │ │ │ ├─────────────────┴──────┤ │ │ │\n│ protocol │ │ username │ password │ host │ │ │ │\n├──────────┴──┼──────────┴──────────┼────────────────────────┤ │ │ │\n│ origin │ │ origin │ pathname │ search │ hash │\n├─────────────┴─────────────────────┴────────────────────────┴──────────┴────────────────┴───────┤\n│ href │\n└────────────────────────────────────────────────────────────────────────────────────────────────┘\n(All spaces in the \"\" line should be ignored. They are purely for formatting.)\nParsing the URL string using the WHATWG API:
\nconst myURL =\n new URL('https://user:pass@sub.example.com:8080/p/a/t/h?query=string#hash');\nParsing the URL string using the Legacy API:
\nimport url from 'url';\nconst myURL =\n url.parse('https://user:pass@sub.example.com:8080/p/a/t/h?query=string#hash');\nconst url = require('url');\nconst myURL =\n url.parse('https://user:pass@sub.example.com:8080/p/a/t/h?query=string#hash');\nIt is possible to construct a WHATWG URL from component parts using either the\nproperty setters or a template literal string:
\nconst myURL = new URL('https://example.org');\nmyURL.pathname = '/a/b/c';\nmyURL.search = '?d=e';\nmyURL.hash = '#fgh';\nconst pathname = '/a/b/c';\nconst search = '?d=e';\nconst hash = '#fgh';\nconst myURL = new URL(`https://example.org${pathname}${search}${hash}`);\nTo get the constructed URL string, use the href property accessor:
console.log(myURL.href);\nBrowser-compatible URL class, implemented by following the WHATWG URL\nStandard. Examples of parsed URLs may be found in the Standard itself.\nThe URL class is also available on the global object.
In accordance with browser conventions, all properties of URL objects\nare implemented as getters and setters on the class prototype, rather than as\ndata properties on the object itself. Thus, unlike legacy urlObjects,\nusing the delete keyword on any properties of URL objects (e.g. delete myURL.protocol, delete myURL.pathname, etc) has no effect but will still\nreturn true.
Gets and sets the fragment portion of the URL.
\nconst myURL = new URL('https://example.org/foo#bar');\nconsole.log(myURL.hash);\n// Prints #bar\n\nmyURL.hash = 'baz';\nconsole.log(myURL.href);\n// Prints https://example.org/foo#baz\nInvalid URL characters included in the value assigned to the hash property\nare percent-encoded. The selection of which characters to\npercent-encode may vary somewhat from what the url.parse() and\nurl.format() methods would produce.
Gets and sets the host portion of the URL.
\nconst myURL = new URL('https://example.org:81/foo');\nconsole.log(myURL.host);\n// Prints example.org:81\n\nmyURL.host = 'example.com:82';\nconsole.log(myURL.href);\n// Prints https://example.com:82/foo\nInvalid host values assigned to the host property are ignored.
Gets and sets the host name portion of the URL. The key difference between\nurl.host and url.hostname is that url.hostname does not include the\nport.
const myURL = new URL('https://example.org:81/foo');\nconsole.log(myURL.hostname);\n// Prints example.org\n\n// Setting the hostname does not change the port\nmyURL.hostname = 'example.com:82';\nconsole.log(myURL.href);\n// Prints https://example.com:81/foo\n\n// Use myURL.host to change the hostname and port\nmyURL.host = 'example.org:82';\nconsole.log(myURL.href);\n// Prints https://example.org:82/foo\nInvalid host name values assigned to the hostname property are ignored.
Gets and sets the serialized URL.
\nconst myURL = new URL('https://example.org/foo');\nconsole.log(myURL.href);\n// Prints https://example.org/foo\n\nmyURL.href = 'https://example.com/bar';\nconsole.log(myURL.href);\n// Prints https://example.com/bar\nGetting the value of the href property is equivalent to calling\nurl.toString().
Setting the value of this property to a new value is equivalent to creating a\nnew URL object using new URL(value). Each of the URL\nobject's properties will be modified.
If the value assigned to the href property is not a valid URL, a TypeError\nwill be thrown.
Gets the read-only serialization of the URL's origin.
\nconst myURL = new URL('https://example.org/foo/bar?baz');\nconsole.log(myURL.origin);\n// Prints https://example.org\nconst idnURL = new URL('https://測試');\nconsole.log(idnURL.origin);\n// Prints https://xn--g6w251d\n\nconsole.log(idnURL.hostname);\n// Prints xn--g6w251d\nGets and sets the password portion of the URL.
\nconst myURL = new URL('https://abc:xyz@example.com');\nconsole.log(myURL.password);\n// Prints xyz\n\nmyURL.password = '123';\nconsole.log(myURL.href);\n// Prints https://abc:123@example.com\nInvalid URL characters included in the value assigned to the password property\nare percent-encoded. The selection of which characters to\npercent-encode may vary somewhat from what the url.parse() and\nurl.format() methods would produce.
Gets and sets the path portion of the URL.
\nconst myURL = new URL('https://example.org/abc/xyz?123');\nconsole.log(myURL.pathname);\n// Prints /abc/xyz\n\nmyURL.pathname = '/abcdef';\nconsole.log(myURL.href);\n// Prints https://example.org/abcdef?123\nInvalid URL characters included in the value assigned to the pathname\nproperty are percent-encoded. The selection of which characters\nto percent-encode may vary somewhat from what the url.parse() and\nurl.format() methods would produce.
Gets and sets the port portion of the URL.
\nThe port value may be a number or a string containing a number in the range\n0 to 65535 (inclusive). Setting the value to the default port of the\nURL objects given protocol will result in the port value becoming\nthe empty string ('').
The port value can be an empty string in which case the port depends on\nthe protocol/scheme:
\n| protocol | \nport | \n
|---|---|
| \"ftp\" | \n21 | \n
| \"file\" | \n\n |
| \"http\" | \n80 | \n
| \"https\" | \n443 | \n
| \"ws\" | \n80 | \n
| \"wss\" | \n443 | \n
Upon assigning a value to the port, the value will first be converted to a\nstring using .toString().
If that string is invalid but it begins with a number, the leading number is\nassigned to port.\nIf the number lies outside the range denoted above, it is ignored.
const myURL = new URL('https://example.org:8888');\nconsole.log(myURL.port);\n// Prints 8888\n\n// Default ports are automatically transformed to the empty string\n// (HTTPS protocol's default port is 443)\nmyURL.port = '443';\nconsole.log(myURL.port);\n// Prints the empty string\nconsole.log(myURL.href);\n// Prints https://example.org/\n\nmyURL.port = 1234;\nconsole.log(myURL.port);\n// Prints 1234\nconsole.log(myURL.href);\n// Prints https://example.org:1234/\n\n// Completely invalid port strings are ignored\nmyURL.port = 'abcd';\nconsole.log(myURL.port);\n// Prints 1234\n\n// Leading numbers are treated as a port number\nmyURL.port = '5678abcd';\nconsole.log(myURL.port);\n// Prints 5678\n\n// Non-integers are truncated\nmyURL.port = 1234.5678;\nconsole.log(myURL.port);\n// Prints 1234\n\n// Out-of-range numbers which are not represented in scientific notation\n// will be ignored.\nmyURL.port = 1e10; // 10000000000, will be range-checked as described below\nconsole.log(myURL.port);\n// Prints 1234\nNumbers which contain a decimal point,\nsuch as floating-point numbers or numbers in scientific notation,\nare not an exception to this rule.\nLeading numbers up to the decimal point will be set as the URL's port,\nassuming they are valid:
\nmyURL.port = 4.567e21;\nconsole.log(myURL.port);\n// Prints 4 (because it is the leading number in the string '4.567e21')\nGets and sets the protocol portion of the URL.
\nconst myURL = new URL('https://example.org');\nconsole.log(myURL.protocol);\n// Prints https:\n\nmyURL.protocol = 'ftp';\nconsole.log(myURL.href);\n// Prints ftp://example.org/\nInvalid URL protocol values assigned to the protocol property are ignored.
The WHATWG URL Standard considers a handful of URL protocol schemes to be\nspecial in terms of how they are parsed and serialized. When a URL is\nparsed using one of these special protocols, the url.protocol property\nmay be changed to another special protocol but cannot be changed to a\nnon-special protocol, and vice versa.
For instance, changing from http to https works:
const u = new URL('http://example.org');\nu.protocol = 'https';\nconsole.log(u.href);\n// https://example.org\nHowever, changing from http to a hypothetical fish protocol does not\nbecause the new protocol is not special.
const u = new URL('http://example.org');\nu.protocol = 'fish';\nconsole.log(u.href);\n// http://example.org\nLikewise, changing from a non-special protocol to a special protocol is also\nnot permitted:
\nconst u = new URL('fish://example.org');\nu.protocol = 'http';\nconsole.log(u.href);\n// fish://example.org\nAccording to the WHATWG URL Standard, special protocol schemes are ftp,\nfile, http, https, ws, and wss.
Gets and sets the serialized query portion of the URL.
\nconst myURL = new URL('https://example.org/abc?123');\nconsole.log(myURL.search);\n// Prints ?123\n\nmyURL.search = 'abc=xyz';\nconsole.log(myURL.href);\n// Prints https://example.org/abc?abc=xyz\nAny invalid URL characters appearing in the value assigned the search\nproperty will be percent-encoded. The selection of which\ncharacters to percent-encode may vary somewhat from what the url.parse()\nand url.format() methods would produce.
Gets the URLSearchParams object representing the query parameters of the\nURL. This property is read-only but the URLSearchParams object it provides\ncan be used to mutate the URL instance; to replace the entirety of query\nparameters of the URL, use the url.search setter. See\nURLSearchParams documentation for details.
Use care when using .searchParams to modify the URL because,\nper the WHATWG specification, the URLSearchParams object uses\ndifferent rules to determine which characters to percent-encode. For\ninstance, the URL object will not percent encode the ASCII tilde (~)\ncharacter, while URLSearchParams will always encode it:
const myUrl = new URL('https://example.org/abc?foo=~bar');\n\nconsole.log(myUrl.search); // prints ?foo=~bar\n\n// Modify the URL via searchParams...\nmyUrl.searchParams.sort();\n\nconsole.log(myUrl.search); // prints ?foo=%7Ebar\nGets and sets the username portion of the URL.
\nconst myURL = new URL('https://abc:xyz@example.com');\nconsole.log(myURL.username);\n// Prints abc\n\nmyURL.username = '123';\nconsole.log(myURL.href);\n// Prints https://123:xyz@example.com/\nAny invalid URL characters appearing in the value assigned the username\nproperty will be percent-encoded. The selection of which\ncharacters to percent-encode may vary somewhat from what the url.parse()\nand url.format() methods would produce.
The toString() method on the URL object returns the serialized URL. The\nvalue returned is equivalent to that of url.href and url.toJSON().
The toJSON() method on the URL object returns the serialized URL. The\nvalue returned is equivalent to that of url.href and\nurl.toString().
This method is automatically called when an URL object is serialized\nwith JSON.stringify().
const myURLs = [\n new URL('https://www.example.com'),\n new URL('https://test.example.org'),\n];\nconsole.log(JSON.stringify(myURLs));\n// Prints [\"https://www.example.com/\",\"https://test.example.org/\"]\nCreates a 'blob:nodedata:...' URL string that represents the given <Blob>\nobject and can be used to retrieve the Blob later.
const {\n Blob,\n resolveObjectURL,\n} = require('buffer');\n\nconst blob = new Blob(['hello']);\nconst id = URL.createObjectURL(blob);\n\n// later...\n\nconst otherBlob = resolveObjectURL(id);\nconsole.log(otherBlob.size);\nThe data stored by the registered <Blob> will be retained in memory until\nURL.revokeObjectURL() is called to remove it.
Blob objects are registered within the current thread. If using Worker\nThreads, Blob objects registered within one Worker will not be available\nto other workers or the main thread.
Removes the stored <Blob> identified by the given ID.
" } ], "signatures": [ { "params": [ { "textRaw": "`input` {string} The absolute or relative input URL to parse. If `input` is relative, then `base` is required. If `input` is absolute, the `base` is ignored.", "name": "input", "type": "string", "desc": "The absolute or relative input URL to parse. If `input` is relative, then `base` is required. If `input` is absolute, the `base` is ignored." }, { "textRaw": "`base` {string|URL} The base URL to resolve against if the `input` is not absolute.", "name": "base", "type": "string|URL", "desc": "The base URL to resolve against if the `input` is not absolute." } ], "desc": "Creates a new URL object by parsing the input relative to the base. If\nbase is passed as a string, it will be parsed equivalent to new URL(base).
const myURL = new URL('/foo', 'https://example.org/');\n// https://example.org/foo\nThe URL constructor is accessible as a property on the global object.\nIt can also be imported from the built-in url module:
\nimport { URL } from 'url';\nconsole.log(URL === globalThis.URL); // Prints 'true'.\nconsole.log(URL === require('url').URL); // Prints 'true'.\nA TypeError will be thrown if the input or base are not valid URLs. Note\nthat an effort will be made to coerce the given values into strings. For\ninstance:
const myURL = new URL({ toString: () => 'https://example.org/' });\n// https://example.org/\nUnicode characters appearing within the host name of input will be\nautomatically converted to ASCII using the Punycode algorithm.
const myURL = new URL('https://測試');\n// https://xn--g6w251d/\nThis feature is only available if the node executable was compiled with\nICU enabled. If not, the domain names are passed through unchanged.
In cases where it is not known in advance if input is an absolute URL\nand a base is provided, it is advised to validate that the origin of\nthe URL object is what is expected.
let myURL = new URL('http://Example.com/', 'https://example.org/');\n// http://example.com/\n\nmyURL = new URL('https://Example.com/', 'https://example.org/');\n// https://example.com/\n\nmyURL = new URL('foo://Example.com/', 'https://example.org/');\n// foo://Example.com/\n\nmyURL = new URL('http:Example.com/', 'https://example.org/');\n// http://example.com/\n\nmyURL = new URL('https:Example.com/', 'https://example.org/');\n// https://example.org/Example.com/\n\nmyURL = new URL('foo:Example.com/', 'https://example.org/');\n// foo:Example.com/\nThe URLSearchParams API provides read and write access to the query of a\nURL. The URLSearchParams class can also be used standalone with one of the\nfour following constructors.\nThe URLSearchParams class is also available on the global object.
The WHATWG URLSearchParams interface and the querystring module have\nsimilar purpose, but the purpose of the querystring module is more\ngeneral, as it allows the customization of delimiter characters (& and =).\nOn the other hand, this API is designed purely for URL query strings.
const myURL = new URL('https://example.org/?abc=123');\nconsole.log(myURL.searchParams.get('abc'));\n// Prints 123\n\nmyURL.searchParams.append('abc', 'xyz');\nconsole.log(myURL.href);\n// Prints https://example.org/?abc=123&abc=xyz\n\nmyURL.searchParams.delete('abc');\nmyURL.searchParams.set('a', 'b');\nconsole.log(myURL.href);\n// Prints https://example.org/?a=b\n\nconst newSearchParams = new URLSearchParams(myURL.searchParams);\n// The above is equivalent to\n// const newSearchParams = new URLSearchParams(myURL.search);\n\nnewSearchParams.append('a', 'c');\nconsole.log(myURL.href);\n// Prints https://example.org/?a=b\nconsole.log(newSearchParams.toString());\n// Prints a=b&a=c\n\n// newSearchParams.toString() is implicitly called\nmyURL.search = newSearchParams;\nconsole.log(myURL.href);\n// Prints https://example.org/?a=b&a=c\nnewSearchParams.delete('a');\nconsole.log(myURL.href);\n// Prints https://example.org/?a=b&a=c\nAppend a new name-value pair to the query string.
" }, { "textRaw": "`urlSearchParams.delete(name)`", "type": "method", "name": "delete", "signatures": [ { "params": [ { "textRaw": "`name` {string}", "name": "name", "type": "string" } ] } ], "desc": "Remove all name-value pairs whose name is name.
Returns an ES6 Iterator over each of the name-value pairs in the query.\nEach item of the iterator is a JavaScript Array. The first item of the Array\nis the name, the second item of the Array is the value.
Alias for