v16.6.3

Compare Source

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. (@​bvaughn in #​14065)
• Fix a false positive warning when using Suspense. (@​acdlite in #​14158)

React DOM Server

• Fix incorrect sharing of context state between renderToNodeStream() calls. (@​sebmarkbage in #​14182)
• Add a warning about incorrect usage of the context API. (@​trueadm in #​14033)

v16.6.1

Compare Source

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 unresolved default props in lifecycle methods of a lazy component. (@​gaearon in #​14112)
• Fix bug when recovering from an error thrown during complete phase. (@​gaearon in #​14104)

Scheduler (Experimental)

• Switch from deadline object to shouldYield API. (@​acdlite in #​14025)

v16.6.0

Compare Source

React

• Add React.memo() as an alternative to PureComponent for functions. (@​acdlite in #​13748)
• Add React.lazy() for code splitting components. (@​acdlite in #​13885)
• React.StrictMode now warns about legacy context API. (@​bvaughn in #​13760)
• React.StrictMode now warns about findDOMNode. (@​sebmarkbage in #​13841)
• Rename unstable_AsyncMode to unstable_ConcurrentMode. (@​trueadm in #​13732)
• Rename unstable_Placeholder to Suspense, and delayMs to maxDuration. (@​gaearon in #​13799 and @​sebmarkbage in #​13922)

React DOM

• Add contextType as a more ergonomic way to subscribe to context from a class. (@​bvaughn in #​13728)
• Add getDerivedStateFromError lifecycle method for catching errors in a future asynchronous server-side renderer. (@​bvaughn in #​13746)
• Warn when <Context> is used instead of <Context.Consumer>. (@​trueadm in #​13829)
• Fix gray overlay on iOS Safari. (@​philipp-spiess in #​13778)
• Fix a bug caused by overwriting window.event in development. (@​sergei-startsev in #​13697)

React DOM Server

• Add support for React.memo(). (@​alexmckenley in #​13855)
• Add support for contextType. (@​alexmckenley and @​sebmarkbage in #​13889)

Scheduler (Experimental)

• Rename the package to scheduler. (@​gaearon in #​13683)
• Support priority levels, continuations, and wrapped callbacks. (@​acdlite in #​13720 and #​13842)
• Improve the fallback mechanism in non-DOM environments. (@​acdlite in #​13740)
• Schedule requestAnimationFrame earlier. (@​acdlite in #​13785)
• Fix the DOM detection to be more thorough. (@​trueadm in #​13731)
• Fix bugs with interaction tracing. (@​bvaughn in #​13590)
• Add the envify transform to the package. (@​mridgway in #​13766)

v16.5.2

Compare Source

React DOM

• Fixed a recent <iframe> regression (@​JSteunou in #​13650)
• Fix updateWrapper so that <textarea>s no longer re-render when data is unchanged (@​joelbarbosa in #​13643)

Schedule (Experimental)

• Renaming "tracking" API to "tracing" (@​bvaughn in #​13641)
• Add UMD production+profiling entry points (@​bvaughn in #​13642)
• Refactored schedule to remove some React-isms and improve performance for when deferred updates time out (@​acdlite in #​13582)

v16.5.1

Compare Source

React

• Improve the warning when React.forwardRef receives an unexpected number of arguments. (@​andresroberto in #​13636)

React DOM

• Fix a regression in unstable exports used by React Native Web. (@​aweary in #​13598)
• Fix a crash when component defines a method called isReactComponent. (@​gaearon in #​13608)
• Fix a crash in development mode in IE9 when printing a warning. (@​link-alex in #​13620)
• Provide a better error message when running react-dom/profiling with schedule/tracking. (@​bvaughn in #​13605)
• If a ForwardRef component defines a displayName, use it in warnings. (@​probablyup in #​13615)

Schedule (Experimental)

• Add a separate profiling entry point at schedule/tracking-profiling. (@​bvaughn in #​13605)

v16.5.0

Compare Source

React

• Add a warning if React.forwardRef render function doesn't take exactly two arguments (@​bvaughn in #​13168)
• Improve the error message when passing an element to createElement by mistake (@​DCtheTall in #​13131)
• Don't call profiler onRender until after mutations (@​bvaughn in #​13572)

React DOM

• Add support for React DevTools Profiler (@​bvaughn in #​13058)
• Add react-dom/profiling entry point alias for profiling in production (@​bvaughn in #​13570)
• Add onAuxClick event for browsers that support it (@​jquense in #​11571)
• Add movementX and movementY fields to mouse events (@​jasonwilliams in #​9018)
• Add tangentialPressure and twist fields to pointer events (@​motiz88 in #​13374)
• Minimally support iframes (nested browsing contexts) in selection event handling (@​acusti in #​12037)
• Support passing booleans to the focusable SVG attribute (@​gaearon in #​13339)
• Ignore <noscript> on the client when hydrating (@​Ephem in #​13537)
• Fix gridArea to be treated as a unitless CSS property (@​mgol in #​13550)
• Fix incorrect data in compositionend event when typing Korean on IE11 (@​crux153 in #​12563)
• Fix a crash when using dynamic children in the <option> tag (@​Slowyn in #​13261, @​gaearon in #​13465)
• Fix the checked attribute not getting initially set on the input (@​dilidili in #​13114)
• Fix hydration of dangerouslySetInnerHTML when __html is not a string (@​gaearon in #​13353)
• Fix a warning about missing controlled onChange to fire on falsy values too (@​nicolevy in #​12628)
• Fix submit and reset buttons getting an empty label (@​ellsclytn in #​12780)
• Fix the onSelect event not being triggered after drag and drop (@​gaearon in #​13422)
• Fix the onClick event not working inside a portal on iOS (@​aweary in #​11927)
• Fix a performance issue when thousands of roots are re-rendered (@​gaearon in #​13335)
• Fix a performance regression that also caused onChange to not fire in some cases (@​gaearon in #​13423)
• Handle errors in more edge cases gracefully (@​gaearon in #​13237 and @​acdlite in #​13269)
• Don't use proxies for synthetic events in development (@​gaearon in #​12171)
• Warn when "false" or "true" is the value of a boolean DOM prop (@​motiz88 in #​13372)
• Warn when this.state is initialized to props (@​veekas in #​11658)
• Don't compare style on hydration in IE due to noisy false positives (@​mgol in #​13534)
• Include StrictMode in the component stack (@​gaearon in #​13240)
• Don't overwrite window.event in IE (@​ConradIrwin in #​11696)
• Improve component stack for the folder/index.js naming convention (@​gaearon in #​12059)
• Improve a warning when using getDerivedStateFromProps without initialized state (@​flxwu in #​13317)
• Improve a warning about invalid textarea usage (@​raunofreiberg in #​13361)
• Treat invalid Symbol and function values more consistently (@​raunofreiberg in #​13362 and #​13389)
• Allow Electron <webview> tag without warnings (@​philipp-spiess in #​13301)
• Don't show the uncaught error addendum if e.preventDefault() was called (@​gaearon in #​13384)
• Warn about rendering Generators (@​gaearon in #​13312)
• Remove irrelevant suggestion of a legacy method from a warning (@​zx6658 in #​13169)
• Remove unstable_deferredUpdates in favor of unstable_scheduleWork from schedule (@​gaearon in #​13488)
• Fix unstable asynchronous mode from doing unnecessary work when an update takes too long (@​acdlite in #​13503)

React DOM Server

• Fix crash with nullish children when using dangerouslySetInnerHtml in a selected <option> (@​mridgway in #​13078)
• Fix crash when setTimeout is missing (@​dustinsoftware in #​13088)

React Test Renderer and Test Utils

• Fix this in a functional component for shallow renderer to be undefined (@​koba04 in #​13144)
• Deprecate a Jest-specific ReactTestUtils.mockComponent() helper (@​bvaughn in #​13193)
• Warn about ReactDOM.createPortal usage within the test renderer (@​bvaughn in #​12895)
• Improve a confusing error message (@​gaearon in #​13351)

React ART

• Add support for DevTools (@​yunchancho in #​13173)

Schedule (Experimental)

• New package for cooperatively scheduling work in a browser environment. It's used by React internally, but its public API is not finalized yet. (@​flarnie in #​12624)

v16.4.2

Compare Source

React DOM Server

• Fix a potential XSS vulnerability when the attacker controls an attribute name (CVE-2018-6341). This fix is available in the latest react-dom@16.4.2, as well as in previous affected minor versions: react-dom@16.0.1, react-dom@16.1.2, react-dom@16.2.1, and react-dom@16.3.3. (@​gaearon in #​13302)

• Fix a crash in the server renderer when an attribute is called hasOwnProperty. This fix is only available in react-dom@16.4.2. (@​gaearon in #​13303)