React changelog

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This release is identical to 18.2 but adds warnings for deprecated APIs and other changes that are needed for React 19. Read the React 19 Upgrade Guide for more info. React Allow writing to this.refs to support string ref codemod 909071 War

React DOM Provide a component stack as a second argument to onRecoverableError. (@gnoff in #24591) Fix hydrating into document causing a blank page on mismatch. (@gnoff in #24523) Fix false positive hydration errors with Suspense. (@gnoff i

React DOM Fix the false positive warning about react-dom/client when using UMD bundle. (@alireza-molaee in #24274) Fix suppressHydrationWarning to work in production too. (@gaearon in #24271) Fix componentWillUnmount firing twice inside of

Below is a list of all new features, APIs, deprecations, and breaking changes. Read React 18 release post and React 18 upgrade guide for more information. New Features React useId is a new hook for generating unique IDs on both the client a

React DOM Remove an unused dependency to address the SharedArrayBuffer cross-origin isolation warning. (@koba04 and @bvaughn in #20831, #20832, and #20840) Artifacts react: https://unpkg.com/[email protected]/umd/ react-art: https://unpkg.com/re

React DOM Fix a crash in IE11. (@gaearon in #20071)

Today, we are releasing React 17! Learn more about React 17 and how to update to it on the official React blog. React Add react/jsx-runtime and react/jsx-dev-runtime for the new JSX transform. (@lunaruan in #18299) Build component stacks fr

React Add support for the new JSX transform. (@lunaruan in #18299)

React DOM Fix bug in legacy mode Suspense where effect clean-up functions are not fired. This only affects users who use Suspense for data fetching in legacy mode, which is not technically supported. (@acdlite in #18238) Revert warning for

React Warn when a string ref is used in a manner that's not amenable to a future codemod (@lunaruan in #17864) Deprecate React.createFactory() (@trueadm in #17878) React DOM Warn when changes in style may cause an unexpected collision (@sop

React DOM Fix passive effects (useEffect) not being fired in a multi-root app. (@acdlite in #17347) React Is Fix lazy and memo types considered elements instead of components (@bvaughn in #17278) Artifacts • react: https://unpkg.com/react@1

React DOM Fix mouseenter handlers from firing twice inside nested React containers. @yuanoook in #16928 Remove unstable_createRoot and unstable_createSyncRoot experimental APIs. (These are available in the Experimental channel as createRoot

React DOM Fix regression in react-native-web by restoring order of arguments in event plugin extractors (@necolas in #16978) Artifacts • react: https://unpkg.com/[email protected]/umd/ • react-art: https://unpkg.com/[email protected]/umd/ • rea

React DOM Fix regression in Next.js apps by allowing Suspense mismatch during hydration to silently proceed (@sebmarkbage in #16943)

React DOM Fix edge case where a hook update wasn't being memoized. (@sebmarkbage in #16359) Fix heuristic for determining when to hydrate, so we don't incorrectly hydrate during an update. (@sebmarkbage in #16739) Clear additional fiber fie

React Add <React.Profiler> API for gathering performance measurements programmatically. (@bvaughn in #15172) Remove unstable_ConcurrentMode in favor of unstable_createRoot. (@acdlite in #15532) React DOM Deprecate old names for the UNSAFE_*

(March 27, 2019) React DOM Fix an incorrect bailout in useReducer(). (@acdlite in #15124) Fix iframe warnings in Safari DevTools. (@renanvalentin in #15099) Warn if contextType is set to Context.Consumer instead of Context. (@aweary in #148

(March 22, 2019) React DOM Don't set the first option as selected in select tag with size attribute. (@kulek1 in #14242) Improve the useEffect(async () => ...) warning message. (@gaearon in #15118) Improve the error message sometimes caused

(March 5, 2019) React DOM and other renderers Fix a bug where DevTools caused a runtime error when inspecting a component that used a useContext hook. (@bvaughn in #14940)

(February 21, 2019) React DOM Fix a bug that caused inputs to behave incorrectly in UMD builds. (@gaearon in #14914) Fix a bug that caused render phase updates to be discarded. (@gaearon in #14852) React DOM Server Unwind the context stack

(February 14, 2019) React DOM Fix ReactDOM.render being ignored inside useEffect. (@gaearon in #14799) Fix a crash when unmounting empty portals. (@gaearon in #14820) Fix useImperativeHandle to work correctly when no deps are specified. (@g

(February 6, 2019) React DOM and React Test Renderer Fix a crash when used together with an older version of React. (@bvaughn in #14770) React Test Utils Fix a crash in Node environment. (@threepointone in #14768) Artifacts react: https://u

React Add Hooks — a way to use state and other React features without writing a class. (@acdlite et al. in #13968) Improve the useReducer Hook lazy initialization API. (@acdlite in #14723) React DOM Bail out of rendering on identical values

React DOM Fix performance of React.lazy for large numbers of lazily-loaded components. (@acdlite in #14429) Clear fields on unmount to avoid memory leaks. (@trueadm in #14276) Fix bug with SSR and context when mixing react-dom/[email protected] a

(November 12, 2018) React DOM Fix bugs in Suspense and lazy. (@acdlite in #14133, #14157, and #14164) Fix highlighting of React.memo updates in React DevTools. (@bvaughn in #14141) Fix interaction of Suspense with the React Profiler. (@bvau

(November 6, 2018) React DOM Fallback should not remount every time a promise resolves. (@acdlite in #14083) Fix bug where Suspense keeps showing fallback even after everything finishes loading. (@acdlite in #14083) Fix a crash when Suspens

React Backport support for the new JSX transform to 15.x. (@lunaruan in #18299 and @gaearon in #20024)

React Backport support for the new JSX transform to 0.14.x. (@lunaruan in #18299 and @gaearon in #20024)

Note: 7.1.0 accidentally removed the component-hook-factories rule, causing errors for users who referenced it in their ESLint config. This is now fixed. Add deprecated no-op component-hook-factories rule for backwards compatibility. (@mofe

This release adds ESLint v10 support, improves performance by skipping compilation for non-React files, and includes compiler lint improvements including better set-state-in-effect detection, improved ref validation, and more helpful error

This release only contains eslint-plugin-react-hooks. Notably, new violations and support for ESLint v9 were added. eslint-plugin-react-hooks New Violations: Component names now need to start with an uppercase letter instead of a non-lowerc