react

Cross-Site Scripting in react

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Cross-Site Scripting in react

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Performance improvements when decoding

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Fixed missing `FormData` entries in Server Actions which regressed in 19.2.6

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Type hardening and performance improvements for React Server Components

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Add more cycle protections in React Server Components

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Add more DoS mitigations to Server Actions, and harden Server Components

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Add extra loop protection to React Server Functions

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Patch Promise cycles and toString on Server Functions

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Move `react-server-dom-webpack/*.unbundled` to private `react-server-dom-unbundled`

Update imports from `react-server-dom-webpack/*.unbundled` to use the private `react-server-dom-unbundled` package instead.

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Bring React Server Component fixes to Server Actions

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eslint-plugin-react-hooks added `react-hooks` settings config option to accept `additionalEffectHooks` for use across exhaustive-deps and rules-of-hooks rules

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eslint-plugin-react-hooks now handles `React.useEffect` in addition to `useEffect` in rules-of-hooks

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eslint-plugin-react-hooks added new violation rule to disallow calling `useEffectEvent` functions in arbitrary closures

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eslint-plugin-react-hooks added new violation rule to disallow calling `use` within try/catch blocks

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Added Node Web Streams support (`prerender`, `renderToReadableStream`) to server-side-rendering APIs for Node.js

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React DOM now batches suspense boundary reveals, matching the behavior of client side rendering for better performance with animations

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Updated `prerender` APIs to return a `postponed` state that can be passed to the `resume` APIs

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Added `resumeAndPrerenderToNodeStream` API for Node Streams to resume a prerender to HTML

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Added `resumeToPipeableStream` API for Node Streams to resume a prerender to a stream

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Added `resumeAndPrerender` API for Web Streams to resume a prerender to HTML

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Added `resume` API for Web Streams to resume a prerender to a stream

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Added React Performance tracks that appear on the Performance panel's timeline in browser developer tools

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Added `cacheSignal` API for RSCs to know when the `cache()` lifetime is over

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Added `useEffectEvent` React Hook to extract non-reactive logic into an Effect Event

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Added `<Activity>` component API to hide and restore the UI and internal state of its children

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eslint-plugin-react-hooks flat config is now the default `recommended` preset, with legacy config moved to `recommended-legacy`

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eslint-plugin-react-hooks now requires Node.js 18 or newer

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React DOM now uses underscore instead of `:` for IDs generated by `useId`

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- 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

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Performance improvements when decoding React Server Components

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Fixed missing FormData entries in Server Actions which regressed in 19.1.7

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