Update react monorepo

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/react (source)	19.0.8 → 19.2.18
@types/react-dom (source)	19.0.3 → 19.2.5
react (source)	19.0.0 → 19.2.8
react-dom (source)	19.0.0 → 19.2.8

---

Release Notes

react/react (react)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

react/react (react-dom)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

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[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/react (source)	19.0.8 → 19.2.18
@types/react-dom (source)	19.0.3 → 19.2.5
react (source)	19.0.0 → 19.2.8
react-dom (source)	19.0.0 → 19.2.8

---

Release Notes

react/react (react)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

react/react (react-dom)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

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[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/react (source)	19.0.8 → 19.2.18
@types/react-dom (source)	19.0.3 → 19.2.5
react (source)	19.0.0 → 19.2.8
react-dom (source)	19.0.0 → 19.2.8

---

Release Notes

react/react (react)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

react/react (react-dom)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

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[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/react (source)	19.0.8 → 19.2.18
@types/react-dom (source)	19.0.3 → 19.2.5
react (source)	19.0.0 → 19.2.8
react-dom (source)	19.0.0 → 19.2.8

---

Release Notes

react/react (react)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

react/react (react-dom)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

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[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/react (source)	19.0.8 → 19.2.18
@types/react-dom (source)	19.0.3 → 19.2.5
react (source)	19.0.0 → 19.2.8
react-dom (source)	19.0.0 → 19.2.8

---

Release Notes

react/react (react)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

react/react (react-dom)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

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[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/react (source)	19.0.8 → 19.2.18
@types/react-dom (source)	19.0.3 → 19.2.5
react (source)	19.0.0 → 19.2.8
react-dom (source)	19.0.0 → 19.2.8

---

Release Notes

react/react (react)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

react/react (react-dom)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

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[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/react (source)	19.0.8 → 19.2.18
@types/react-dom (source)	19.0.3 → 19.2.5
react (source)	19.0.0 → 19.2.8
react-dom (source)	19.0.0 → 19.2.8

---

Release Notes

react/react (react)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

react/react (react-dom)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

---

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[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/react (source)	19.0.8 → 19.2.18
@types/react-dom (source)	19.0.3 → 19.2.5
react (source)	19.0.0 → 19.2.8
react-dom (source)	19.0.0 → 19.2.8

---

Release Notes

react/react (react)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

react/react (react-dom)

v19.2.8

Compare Source

v19.2.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.2.6 (@​unstubbable#​36566)

v19.2.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.2.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.2.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.2.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.2.2

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.2.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features

• <Activity>: A new API to hide and restore the UI and internal state of its children.
• useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
• cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
• React Performance tracks appear on the Performance panel’s timeline in your browser developer tools

New React DOM Features

• Added resume APIs for partial pre-rendering with Web Streams:
  • resume: to resume a prerender to a stream.
  • resumeAndPrerender: to resume a prerender to HTML.
• Added resume APIs for partial pre-rendering with Node Streams:
  • resumeToPipeableStream: to resume a prerender to a stream.
  • resumeAndPrerenderToNodeStream: to resume a prerender to HTML.
• Updated prerender APIs to return a postponed state that can be passed to the resume APIs.

Notable changes

• React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
• Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
• Use underscore instead of : IDs generated by useId

All Changes

React

• <Activity /> was developed over many years, starting before ClassComponent.setState (@​acdlite@​sebmarkbage and many others)
• Stringify context as "SomeContext" instead of "SomeContext.Provider" (@​kassens#​33507)
• Include stack of cause of React instrumentation errors with %o placeholder (@​eps1lon#​34198)
• Fix infinite useDeferredValue loop in popstate event (@​acdlite#​32821)
• Fix a bug when an initial value was passed to useDeferredValue (@​acdlite#​34376)
• Fix a crash when submitting forms with Client Actions (@​sebmarkbage#​33055)
• Hide/unhide the content of dehydrated suspense boundaries if they resuspend (@​sebmarkbage#​32900)
• Avoid stack overflow on wide trees during Hot Reload (@​sophiebits#​34145)
• Improve Owner and Component stacks in various places (@​sebmarkbage, @​eps1lon: #​33629, #​33724, #​32735, #​33723)
• Add cacheSignal (@​sebmarkbage#​33557)

React DOM

• Block on Suspensey Fonts during reveal of server-side-rendered content (@​sebmarkbage#​33342)
• Use underscore instead of : for IDs generated by useId (@​sebmarkbage, @​eps1lon: #​32001, facebook#33342#​33099, #​33422)
• Stop warning when ARIA 1.3 attributes are used (@​Abdul-Omira#​34264)
• Allow nonce to be used on hoistable styles (@​Andarist#​32461)
• Warn for using a React owned node as a Container if it also has text content (@​sebmarkbage#​32774)
• s/HTML/text for for error messages if text hydration mismatches (@​rickhanlonii#​32763)
• Fix a bug with React.use inside React.lazy-ed Component (@​hi-ogawa#​33941)
• Enable the progressiveChunkSize option for server-side-rendering APIs (@​sebmarkbage#​33027)
• Fix a bug with deeply nested Suspense inside Suspense fallback when server-side-rendering (@​gnoff#​33467)
• Avoid hanging when suspending after aborting while rendering (@​gnoff#​34192)
• Add Node Web Streams to server-side-rendering APIs for Node.js (@​sebmarkbage#​33475)

React Server Components

• Preload <img> and <link> using hints before they're rendered (@​sebmarkbage#​34604)
• Log error if production elements are rendered during development (@​eps1lon#​34189)
• Fix a bug when returning a Temporary reference (e.g. a Client Reference) from Server Functions (@​sebmarkbage#​34084, @​denk0403#​33761)
• Pass line/column to filterStackFrame (@​eps1lon#​33707)
• Support Async Modules in Turbopack Server References (@​lubieowoce#​34531)
• Add support for .mjs file extension in Webpack (@​jennyscript#​33028)
• Fix a wrong missing key warning (@​unstubbable#​34350)
• Make console log resolve in predictable order (@​sebmarkbage#​33665)

React Reconciler

• createContainer and createHydrationContainer had their parameter order adjusted after on* handlers to account for upcoming experimental APIs

v19.1.9

Compare Source

v19.1.8

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.1.7 (@​unstubbable#​36567)

v19.1.7

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.1.6

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.1.5

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.1.4

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.1.3

Compare Source

React Server Components

• Move react-server-dom-webpack/*.unbundled to private react-server-dom-unbundled (@​eps1lon#​35290)
• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.1.2

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

v19.1.1

Compare Source

React

• Fixed Owner Stacks to work with ES2015 function.name semantics (#​33680 by @​hoxyq)

v19.1.0

Compare Source

Owner Stack

An Owner Stack is a string representing the components that are directly responsible for rendering a particular component. You can log Owner Stacks when debugging or use Owner Stacks to enhance error overlays or other development tools. Owner Stacks are only available in development builds. Component Stacks in production are unchanged.

• An Owner Stack is a development-only stack trace that helps identify which components are responsible for rendering a particular component. An Owner Stack is distinct from a Component Stacks, which shows the hierarchy of components leading to an error.
• The captureOwnerStack API is only available in development mode and returns a Owner Stack, if available. The API can be used to enhance error overlays or log component relationships when debugging. #​29923, #​32353, #​30306,
  #​32538, #​32529, #​32538

React

• Enhanced support for Suspense boundaries to be used anywhere, including the client, server, and during hydration. #​32069, #​32163, #​32224, #​32252
• Reduced unnecessary client rendering through improved hydration scheduling #​31751
• Increased priority of client rendered Suspense boundaries #​31776
• Fixed frozen fallback states by rendering unfinished Suspense boundaries on the client. #​31620
• Reduced garbage collection pressure by improving Suspense boundary retries. #​31667
• Fixed erroneous “Waiting for Paint” log when the passive effect phase was not delayed #​31526
• Fixed a regression causing key warnings for flattened positional children in development mode. #​32117
• Updated useId to use valid CSS selectors, changing format from :r123: to «r123». #​32001
• Added a dev-only warning for null/undefined created in useEffect, useInsertionEffect, and useLayoutEffect. #​32355
• Fixed a bug where dev-only methods were exported in production builds. React.act is no longer available in production builds. #​32200
• Improved consistency across prod and dev to improve compatibility with Google Closure Compiler and bindings #​31808
• Improve passive effect scheduling for consistent task yielding. #​31785
• Fixed asserts in React Native when passChildrenWhenCloningPersistedNodes is enabled for OffscreenComponent rendering. #​32528
• Fixed component name resolution for Portal #​32640
• Added support for beforetoggle and toggle events on the dialog element. #​32479

React DOM

• Fixed double warning when the href attribute is an empty string #​31783
• Fixed an edge case where getHoistableRoot() didn’t work properly when the container was a Document #​32321
• Removed support for using HTML comments (e.g. <!-- -->) as a DOM container. #​32250
• Added support for <script> and <template> tags to be nested within <select> tags. #​31837
• Fixed responsive images to be preloaded as HTML instead of headers #​32445

use-sync-external-store

• Added exports field to package.json for use-sync-external-store to support various entrypoints. #​25231

React Server Components

• Added unstable_prerender, a new experimental API for prerendering React Server Components on the server #​31724
• Fixed an issue where streams would hang when receiving new chunks after a global error #​31840, #​31851
• Fixed an issue where pending chunks were counted twice. #​31833
• Added support for streaming in edge environments #​31852
• Added support for sending custom error names from a server so that they are available in the client for console replaying. #​32116
• Updated the server component wire format to remove IDs for hints and console.log because they have no return value #​31671
• Exposed registerServerReference in client builds to handle server references in different environments. #​32534
• Added react-server-dom-parcel package which integrates Server Components with the Parcel bundler#​31725, #​32132, #​31799, #​32294, #​31741

v19.0.8

Compare Source

v19.0.7

Compare Source

React Server Components

• Fixed missing FormData entries in Server Actions which regressed in 19.0.6 (@​unstubbable#​36568)

v19.0.6

Compare Source

React Server Components

• Type hardening and performance improvements (@​eps1lon, @​unstubbable#​36425)

v19.0.5

Compare Source

React Server Components

• Add more cycle protections (@​eps1lon, @​unstubbable#​36236)

v19.0.4

Compare Source

React Server Components

• Add more DoS mitigations to Server Actions, and harden Server Components (@​gnoff, @​lubieowoce, @​sebmarkbage, @​unstubbable#​35632)

v19.0.3

Compare Source

React Server Components

• Add extra loop protection to React Server Functions (@​sebmarkbage#​35351)

v19.0.2

Compare Source

React Server Components

• Patch Promise cycles and toString on Server Functions (@​sebmarkbage, @​unstubbable#​35289, #​35345)

v19.0.1

Compare Source

React Server Components

• Bring React Server Component fixes to Server Actions (@​sebmarkbage#​35277)

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
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Project	Deployment	Actions	Updated (UTC)
cv	Error		Aug 24, 2026 3:53am