v16.14.0

Compare Source

React

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

v16.13.1

Compare Source

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 cross-component updates that happen inside class render lifecycles (componentWillReceiveProps, shouldComponentUpdate, and so on). (@​gaearon in #​18330)

v16.13.0

Compare Source

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 (@​sophiebits in #​14181, #​18002)
• Warn when a function component is updated during another component's render phase (@​acdlite in #​17099)
• Deprecate unstable_createPortal (@​trueadm in #​17880)
• Fix onMouseEnter being fired on disabled buttons (@​AlfredoGJ in #​17675)
• Call shouldComponentUpdate twice when developing in StrictMode (@​bvaughn in #​17942)
• Add version property to ReactDOM (@​ealush in #​15780)
• Don't call toString() of dangerouslySetInnerHTML (@​sebmarkbage in #​17773)
• Show component stacks in more warnings (@​gaearon in #​17922, #​17586)

Concurrent Mode (Experimental)

• Warn for problematic usages of ReactDOM.createRoot() (@​trueadm in #​17937)
• Remove ReactDOM.createRoot() callback params and added warnings on usage (@​bvaughn in #​17916)
• Don't group Idle/Offscreen work with other work (@​sebmarkbage in #​17456)
• Adjust SuspenseList CPU bound heuristic (@​sebmarkbage in #​17455)
• Add missing event plugin priorities (@​trueadm in #​17914)
• Fix isPending only being true when transitioning from inside an input event (@​acdlite in #​17382)
• Fix React.memo components dropping updates when interrupted by a higher priority update (@​acdlite in #​18091)
• Don't warn when suspending at the wrong priority (@​gaearon in #​17971)
• Fix a bug with rebasing updates (@​acdlite and @​sebmarkbage in #​17560, #​17510, #​17483, #​17480)

v16.12.0

Compare Source

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)

v16.11.0

Compare Source

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 and createSyncRoot.) (@​acdlite in #​17088)

v16.10.2

Compare Source

React DOM

• Fix regression in react-native-web by restoring order of arguments in event plugin extractors (@​necolas in #​16978)

v16.10.1

Compare Source

React DOM

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

v16.10.0

Compare Source

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 fields during unmount to save memory. (@​trueadm in #​16807)
• Fix bug with required text fields in Firefox. (@​halvves in #​16578)
• Prefer Object.is instead of inline polyfill, when available. (@​ku8ar in #​16212)
• Fix bug when mixing Suspense and error handling. (@​acdlite in #​16801)

Scheduler (Experimental)

• Improve queue performance by switching its internal data structure to a min binary heap. (@​acdlite in #​16245)
• Use postMessage loop with short intervals instead of attempting to align to frame boundaries with requestAnimationFrame. (@​acdlite in #​16214)

useSubscription

• Avoid tearing issue when a mutation happens and the previous update is still in progress. (@​bvaughn in #​16623)

v16.9.0

Compare Source

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_* lifecycle methods. (@​bvaughn in #​15186 and @​threepointone in #​16103)
• Deprecate javascript: URLs as a common attack surface. (@​sebmarkbage in #​15047)
• Deprecate uncommon "module pattern" (factory) components. (@​sebmarkbage in #​15145)
• Add support for the disablePictureInPicture attribute on <video>. (@​eek in #​15334)
• Add support for onLoad event for <embed>. (@​cherniavskii in #​15614)
• Add support for editing useState state from DevTools. (@​bvaughn in #​14906)
• Add support for toggling Suspense from DevTools. (@​gaearon in #​15232)
• Warn when setState is called from useEffect, creating a loop. (@​gaearon in #​15180)
• Fix a memory leak. (@​paulshen in #​16115)
• Fix a crash inside findDOMNode for components wrapped in <Suspense>. (@​acdlite in #​15312)
• Fix pending effects from being flushed too late. (@​acdlite in #​15650)
• Fix incorrect argument order in a warning message. (@​brickspert in #​15345)
• Fix hiding Suspense fallback nodes when there is an !important style. (@​acdlite in #​15861 and #​15882)
• Slightly improve hydration performance. (@​bmeurer in #​15998)

React DOM Server

• Fix incorrect output for camelCase custom CSS property names. (@​bedakb in #​16167)

React Test Utilities and Test Renderer

• Add act(async () => ...) for testing asynchronous state updates. (@​threepointone in #​14853)
• Add support for nesting act from different renderers. (@​threepointone in #​16039 and #​16042)
• Warn in Strict Mode if effects are scheduled outside an act() call. (@​threepointone in #​15763 and #​16041)
• Warn when using act from the wrong renderer. (@​threepointone in #​15756)

ESLint Plugin: React Hooks

• Report Hook calls at the top level as a violation. (gaearon in #​16455)

v16.8.6

Compare Source

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 #​14831)
• Warn if contextType is set to invalid values. (@​gaearon in #​15142)

v16.8.5

Compare Source

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 by duplicate React. (@​jaredpalmer in #​15139)

React DOM Server

• Improve the useLayoutEffect warning message when server rendering. (@​gaearon in #​15158)

React Shallow Renderer

• Fix setState in shallow renderer to work with Hooks. (@​gaearon in #​15120)
• Fix shallow renderer to support React.memo. (@​aweary in #​14816)
• Fix shallow renderer to support Hooks inside forwardRef. (@​eps1lon in #​15100)

v16.8.4

Compare Source

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)

v16.8.3

Compare Source

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 when a stream is destroyed without completing, to prevent incorrect values during a subsequent render. (@​overlookmotel in #​14706)

ESLint Plugin for React Hooks

• Add a new recommended exhaustive-deps rule. (@​gaearon in #​14636)

v16.8.2

Compare Source

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. (@​gaearon in #​14801)
• Fix crossOrigin attribute to work in SVG image elements. (@​aweary in #​14832)
• Fix a false positive warning when using Suspense with Hooks. (@​gaearon in #​14821)

React Test Utils and React Test Renderer

• Include component stack into the act() warning. (@​threepointone in #​14855)

v16.8.1

Compare Source

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)