Introducing Concurrent Mode (Experimental)

Caution:

This page is somewhat outdated and only exists for historical purposes.

React 18 was released with support for concurrency. However, there is no “mode” anymore, and the new behavior is fully opt-in and only enabled when you use the new features.

For up-to-date high-level information, refer to:

• React 18 Announcement
• Upgrading to React 18
• React Conf 2021 Videos

For details about concurrent APIs in React 18, refer to:

• React.Suspense reference
• React.startTransition reference
• React.useTransition reference
• React.useDeferredValue reference

The rest of this page includes content that’s stale, broken, or incorrect.