Summary: This sync includes the following changes: - **[ec6691a68](https://github.com/facebook/react/commit/ec6691a68 )**: Event API: remove isTargetDirectlyWithinEventComponent (#15546) //<Dominic Gannaway>// - **[a6e30001f](https://github.com/facebook/react/commit/a6e30001f )**: Delete duplicate Focus.js (#15540) //<Dominic Gannaway>// - **[f7993d547](https://github.com/facebook/react/commit/f7993d547 )**: Delete duplicate Hover.js (#15539) //<Dominic Gannaway>// - **[c8ee10037](https://github.com/facebook/react/commit/c8ee10037 )**: Delete duplicate Swipe.js (#15541) //<Dominic Gannaway>// - **[494716c9b](https://github.com/facebook/react/commit/494716c9b )**: Delete duplicate Drag.js (#15537) //<Dominic Gannaway>// - **[377846fef](https://github.com/facebook/react/commit/377846fef )**: Delete duplicate Press.js (#15538) //<Dominic Gannaway>// - **[379515e83](https://github.com/facebook/react/commit/379515e83 )**: Follow up to 15535 (#15536) //<Dominic Gannaway>// - **[bd88982fb](https://github.com/facebook/react/commit/bd88982fb )**: Event API: use `capture` for all event listeners using experimental responder system (#15526) //<Dominic Gannaway>// - **[72ca3c60e](https://github.com/facebook/react/commit/72ca3c60e )**: Bump scheduler version to 0.14.0 (#15395) //<Andrew Clark>// - **[7882c41f6](https://github.com/facebook/react/commit/7882c41f6 )**: Use lowercase entry points for event modules (#15535) //<Andrew Clark>// - **[43c4e5f34](https://github.com/facebook/react/commit/43c4e5f34 )**: Add method for forcing a lower framerate //<Nathan Schloss>// - **[1b752f191](https://github.com/facebook/react/commit/1b752f191 )**: Fixed potential interaction tracing leak in Suspense thennable memoization (#15531) //<Brian Vaughn>// - **[12e5a13cf](https://github.com/facebook/react/commit/12e5a13cf )**: [React Native] Inline calls to FabricUIManager in shared code (#15490) //<Eli White>// - **[2cca18728](https://github.com/facebook/react/commit/2cca18728 )**: React Events: add onFocusVisibleChange to Focus (#15516) //<Nicolas Gallagher>// - **[cc5a49379](https://github.com/facebook/react/commit/cc5a49379 )**: React Events: FocusScope tweaks and docs (#15515) //<Nicolas Gallagher>// - **[796c67a25](https://github.com/facebook/react/commit/796c67a25 )**: Event API: responder event types should not re-register on EventComponent update (#15514) //<Dominic Gannaway>// - **[c4d1dcb53](https://github.com/facebook/react/commit/c4d1dcb53 )**: React Events: core API documentation followup (#15506) //<Dominic Gannaway>// - **[41ef1961c](https://github.com/facebook/react/commit/41ef1961c )**: Update TopLevelEventTypes.js (#15511) //<Dan Nate>// - **[7a482af5d](https://github.com/facebook/react/commit/7a482af5d )**: Event API: Fix bug where Press root events were not being cleared (#15507) //<Dominic Gannaway>// - **[a14e24efa](https://github.com/facebook/react/commit/a14e24efa )**: React Events: core API documentation (#15505) //<Nicolas Gallagher>// - **[8658611b6](https://github.com/facebook/react/commit/8658611b6 )**: Event API: ensure event keys are unique + add validation (#15501) //<Dominic Gannaway>// - **[d9839740e](https://github.com/facebook/react/commit/d9839740e )**: React events: remove unused types (#15503) //<Nicolas Gallagher>// - **[0b3431170](https://github.com/facebook/react/commit/0b3431170 )**: React events: fix press end event dispatching (#15500) //<Nicolas Gallagher>// - **[d1f667acc](https://github.com/facebook/react/commit/d1f667acc )**: Event API: follow up fixes for FocusScope + context changes (#15496) //<Dominic Gannaway>// - **[c530639dd](https://github.com/facebook/react/commit/c530639dd )**: Minor code structure adjustments to the bundles.js file (#15079) //<Kunuk Nykjær>// - **[ed36df46c](https://github.com/facebook/react/commit/ed36df46c )**: add --watch mode to "yarn build" (#15116) //<Alec Larson>// - **[793ef9b85](https://github.com/facebook/react/commit/793ef9b85 )**: test(eslint-plugin-react-hooks): add coverage for unused custom hook (#15130) //<Redmond Tran>// - **[d61da9387](https://github.com/facebook/react/commit/d61da9387 )**: test(accumulate): add test suite for accumulate function (#15159) //<Jeffrey Berry>// - **[a187e9b5e](https://github.com/facebook/react/commit/a187e9b5e )**: React Native: Allow Views to be nested inside of Text (#15464) //<Adam Comella>// - **[f85aadefc](https://github.com/facebook/react/commit/f85aadefc )**: ADD: disablePictureInPicture attribute for HTML5 videos (#15334) //<Radu-Sebastian Amarie>// - **[1eb2b892d](https://github.com/facebook/react/commit/1eb2b892d )**: give `canUseDOM` with a possibility to be a constant (#14194) //<FUJI Goro>// - **[de26d6dd3](https://github.com/facebook/react/commit/de26d6dd3 )**: typo fix (#15493) //<shubham>// - **[64e3da286](https://github.com/facebook/react/commit/64e3da286 )**: Event API: Add `FocusScope` surface (#15487) //<Dominic Gannaway>// - **[3f058debc](https://github.com/facebook/react/commit/3f058debc )**: Event API: various bug fixes (#15485) //<Dominic Gannaway>// - **[fb28e9048](https://github.com/facebook/react/commit/fb28e9048 )**: Add missing word to code comment for clarity (#15443) //<Brendan McLoughlin>// - **[fa2fa3564](https://github.com/facebook/react/commit/fa2fa3564 )**: Experimental event API: adds context.isTargetDirectlyWithinEventComponent (#15481) //<Dominic Gannaway>// - **[d3af2f2a5](https://github.com/facebook/react/commit/d3af2f2a5 )**: Experimental Event API: add event component mount phase callback (#15480) //<Dominic Gannaway>// - **[ce126fbb2](https://github.com/facebook/react/commit/ce126fbb2 )**: Fix priority inference of next level of work (#15478) //<Andrew Clark>// - **[71c8759ce](https://github.com/facebook/react/commit/71c8759ce )**: Measure callback timeout relative to current time (#15479) //<Andrew Clark>// - **[9c6ff136c](https://github.com/facebook/react/commit/9c6ff136c )**: Remove timeout from performance flamegraph (#15477) //<Andrew Clark>// - **[299a2714c](https://github.com/facebook/react/commit/299a2714c )**: Use stricter equality check (#15474) //<Dan Abramov>// - **[017d6f14b](https://github.com/facebook/react/commit/017d6f14b )**: Experimental Event API: add `rootEventTypes` support to event responders (#15475) //<Dominic Gannaway>// - **[784ebd8fa](https://github.com/facebook/react/commit/784ebd8fa )**: Experimental event API: rework the propagation system for event components (#15462) //<Dominic Gannaway>// - **[587676900](https://github.com/facebook/react/commit/587676900 )**: React events: initial implementation of disabled prop (#15458) //<Nicolas Gallagher>// - **[59c7aef91](https://github.com/facebook/react/commit/59c7aef91 )**: React events: add a test for focusable descendants (#15457) //<Nicolas Gallagher>// - **[0a8da3391](https://github.com/facebook/react/commit/0a8da3391 )**: React events: README update types and remove stopPropagation prop (#15456) //<Nicolas Gallagher>// - **[d584fcdc6](https://github.com/facebook/react/commit/d584fcdc6 )**: React events: use passive events where possible (#15454) //<Nicolas Gallagher>// - **[051513bfa](https://github.com/facebook/react/commit/051513bfa )**: React Events: consolidate logic for Press event component (#15451) //<Nicolas Gallagher>// - **[cdfce1ad2](https://github.com/facebook/react/commit/cdfce1ad2 )**: React events: consolidate logic of Hover event component (#15450) //<Nicolas Gallagher>// - **[5857c89da](https://github.com/facebook/react/commit/5857c89da )**: React events: extract common helper functions (#15449) //<Nicolas Gallagher>// - **[0b50fb29f](https://github.com/facebook/react/commit/0b50fb29f )**: Include rootEventTypes in DOMEventResponderSystem stopPropagation tests (#15433) //<Nicolas Gallagher>// - **[1ae409d2c](https://github.com/facebook/react/commit/1ae409d2c )**: React events: fix nested Hover components error (#15428) //<Nicolas Gallagher>// - **[c73ab39c1](https://github.com/facebook/react/commit/c73ab39c1 )**: React events: make nested Focus work as expected (#15421) //<Nicolas Gallagher>// - **[4221565e1](https://github.com/facebook/react/commit/4221565e1 )**: Cancel pending commit before starting on root //<Andrew Clark>// - **[9ebe1768a](https://github.com/facebook/react/commit/9ebe1768a )**: Experimental Event API: Redesign event responder propagation (#15408) //<Dominic Gannaway>// - **[a30e7d992](https://github.com/facebook/react/commit/a30e7d992 )**: act() tests - Reuse and properly unmount containers (#14974) //<Philipp Spiess>// - **[8cf963c6c](https://github.com/facebook/react/commit/8cf963c6c )**: React events: ignore device buttons that aren't for primary interactions (#15402) //<Nicolas Gallagher>// - **[38bd570d4](https://github.com/facebook/react/commit/38bd570d4 )**: Stop tracking bundle sizes (#15404) //<Andrew Clark>// - **[3438e5ce8](https://github.com/facebook/react/commit/3438e5ce8 )**: Experimental Event API: Add Hover onUnmount support (#15394) //<Dominic Gannaway>// - **[805e7f873](https://github.com/facebook/react/commit/805e7f873 )**: React events: add unmounting to Focus (#15396) //<Nicolas Gallagher>// - **[543353a04](https://github.com/facebook/react/commit/543353a04 )**: Experimental Event API: Remove "listener" from event objects (#15391) //<Dominic Gannaway>// - **[9055e31e5](https://github.com/facebook/react/commit/9055e31e5 )**: Replace old Fiber Scheduler with new one (#15387) //<Andrew Clark>// - **[4e59d4f5d](https://github.com/facebook/react/commit/4e59d4f5d )**: React events: add onHoverMove support (#15388) //<Nicolas Gallagher>// - **[de7590327](https://github.com/facebook/react/commit/de7590327 )**: Fix CI (#15393) //<Andrew Clark>// - **[687e4fb6f](https://github.com/facebook/react/commit/687e4fb6f )**: Bump scheduler version to 0.14.0 //<Andrew Clark>// - **[45473c94c](https://github.com/facebook/react/commit/45473c94c )**: React events: Press event fixes (#15386) //<Nicolas Gallagher>// - **[9672cf621](https://github.com/facebook/react/commit/9672cf621 )**: Experimental Event API: adds `stopPropagation` by default to Press (#15384) //<Dominic Gannaway>// - **[a9eff329c](https://github.com/facebook/react/commit/a9eff329c )**: Remove TouchHitTarget SSR logic to prevent issues with mouse events (#15381) //<Dominic Gannaway>// - **[c9841001b](https://github.com/facebook/react/commit/c9841001b )**: Experimental Event API: preventDefault handling for anchors (#15383) //<Dominic Gannaway>// - **[c25c59c80](https://github.com/facebook/react/commit/c25c59c80 )**: Apply the Just Noticeable Difference to suspense timeouts (#15367) //<Sebastian Markbåge>// - **[3e2e930d6](https://github.com/facebook/react/commit/3e2e930d6 )**: Fixes a Flow type merge conflict (#15378) //<Dominic Gannaway>// - **[7fc91f17c](https://github.com/facebook/react/commit/7fc91f17c )**: React events: add onPressMove and pressRetentionOffset to Press (#15374) //<Nicolas Gallagher>// - **[dd9cef9fc](https://github.com/facebook/react/commit/dd9cef9fc )**: Experimental Event API: Add targets and responder utility method for finding targets (#15372) //<Dominic Gannaway>// - **[c64b33003](https://github.com/facebook/react/commit/c64b33003 )**: Move EventTypes to ReactTypes (#15364) //<Dominic Gannaway>// - **[4c78ac0b9](https://github.com/facebook/react/commit/4c78ac0b9 )**: Track Event Time as the Start Time for Suspense (#15358) //<Sebastian Markbåge>// - **[875d05d55](https://github.com/facebook/react/commit/875d05d55 )**: Include full error messages in React Native build (#15363) //<Andrew Clark>// - **[1b2159acc](https://github.com/facebook/react/commit/1b2159acc )**: [React Native] measure calls will now call FabricUIManager (#15324) //<Eli White>// - **[c7a959982](https://github.com/facebook/react/commit/c7a959982 )**: [React Native] Add tests to paper renderer for measure, measureLayout (#15323) //<Eli White>// - **[aece8119c](https://github.com/facebook/react/commit/aece8119c )**: Refactor EventComponent logic + add onOwnershipChange callback (#15354) //<Dominic Gannaway>// - **[183d1f42e](https://github.com/facebook/react/commit/183d1f42e )**: Fix: Measure expiration times relative to module initialization (#15357) //<Andrew Clark>// - **[b4bc33a58](https://github.com/facebook/react/commit/b4bc33a58 )**: Fix areHookInputsEqual method warning params order (#15345) //<砖家>// - **[29fb5862f](https://github.com/facebook/react/commit/29fb5862f )**: Move EventComponent state creation to complete phase + tests (#15352) //<Dominic Gannaway>// - **[745baf2e0](https://github.com/facebook/react/commit/745baf2e0 )**: Provide new jsx transform target for reactjs/rfcs#107 (#15141) //<Ricky Vetter>// - **[81a61b1d1](https://github.com/facebook/react/commit/81a61b1d1 )**: React events: add delay props to Press module (#15340) //<Nicolas Gallagher>// - **[4064ea9fa](https://github.com/facebook/react/commit/4064ea9fa )**: Experimental event API: Support EventComponent onUnmount responder callback (#15335) //<Dominic Gannaway>// - **[4fbbae8af](https://github.com/facebook/react/commit/4fbbae8af )**: Add full TouchHitTarget hit slop (experimental event API) to ReactDOM (#15308) //<Dominic Gannaway>// - **[958b6173f](https://github.com/facebook/react/commit/958b6173f )**: Add delay props to Hover event module (#15325) //<Nicolas Gallagher>// - **[c3cc936da](https://github.com/facebook/react/commit/c3cc936da )**: Add Hover,Focus,Press docs to REAMDE (#15328) //<Nicolas Gallagher>// - **[49595e921](https://github.com/facebook/react/commit/49595e921 )**: [New Scheduler] Fix: Suspending an expired update (#15326) //<Andrew Clark>// - **[b93a8a9bb](https://github.com/facebook/react/commit/b93a8a9bb )**: Experimental event API: refactor responder modules for lifecycle inclusion (#15322) //<Dominic Gannaway>// - **[937d262f5](https://github.com/facebook/react/commit/937d262f5 )**: React events: keyboard press, types, tests (#15314) //<Nicolas Gallagher>// - **[7a2dc4853](https://github.com/facebook/react/commit/7a2dc4853 )**: Allow DevTools to toggle Suspense fallbacks (#15232) //<Dan Abramov>// - **[43b1f74c8](https://github.com/facebook/react/commit/43b1f74c8 )**: Alternate fix for #14198 //<Andrew Clark>// - **[41aa345d2](https://github.com/facebook/react/commit/41aa345d2 )**: Fix a crash in Suspense with findDOMNode //<Dan Abramov>// - **[6d0effad7](https://github.com/facebook/react/commit/6d0effad7 )**: Expose extra internals in FB build of react-dom/unstable-new-scheduler (#15311) //<Andrew Clark>// - **[3a44ccefe](https://github.com/facebook/react/commit/3a44ccefe )**: Fix feature flags react-dom/unstable-new-scheduler (#15309) //<Andrew Clark>// - **[92a1d8fea](https://github.com/facebook/react/commit/92a1d8fea )**: mark react-events as private so we publish script skips it for now (#15307) //<Sunil Pai>// - **[e5c59359c](https://github.com/facebook/react/commit/e5c59359c )**: Prevent bundling of Node polyfills when importing TestUtils/TestRenderer (#15305) //<Dan Abramov>// - **[73187239a](https://github.com/facebook/react/commit/73187239a )**: writing unit tests in experimental event Drag API (#15297) //<Behzad Abbasi>// - **[89064fe68](https://github.com/facebook/react/commit/89064fe68 )**: Adds displayName to EventComponent and EventTarget (#15268) //<Dominic Gannaway>// - **[fc6a9f1a1](https://github.com/facebook/react/commit/fc6a9f1a1 )**: Add test for async event dispatching (#15300) //<Nicolas Gallagher>// - **[38fa84088](https://github.com/facebook/react/commit/38fa84088 )**: Experiemental event API - wrap async dispatched events (#15299) //<Dominic Gannaway>// - **[4d5cb64aa](https://github.com/facebook/react/commit/4d5cb64aa )**: Rewrite ReactFiberScheduler for better integration with Scheduler package (#15151) //<Andrew Clark>// - **[aed0e1c30](https://github.com/facebook/react/commit/aed0e1c30 )**: await act(async () => ...) (#14853) //<Sunil Pai>// - **[4c75881ee](https://github.com/facebook/react/commit/4c75881ee )**: Remove maxDuration from tests (#15272) //<Sebastian Markbåge>// - **[9307932fe](https://github.com/facebook/react/commit/9307932fe )**: Refactor event object creation for the experimental event API (#15295) //<Dominic Gannaway>// - **[6a1e6b2f7](https://github.com/facebook/react/commit/6a1e6b2f7 )**: Experimental event API: loosen EventTarget constraints and warnings (#15292) //<Dominic Gannaway>// - **[f243deab8](https://github.com/facebook/react/commit/f243deab8 )**: Add tests for Press responder event module (#15290) //<Nicolas Gallagher>// - **[296c4393d](https://github.com/facebook/react/commit/296c4393d )**: Add Press event prop types and fix a check in Safari (#15288) //<Nicolas Gallagher>// - **[4482fdded](https://github.com/facebook/react/commit/4482fdded )**: Fix host context issues around EventComponents and EventTargets (#15284) //<Dominic Gannaway>// - **[5ef0d1d29](https://github.com/facebook/react/commit/5ef0d1d29 )**: Rename hover props in experimental event API and write unit tests (#15283) //<Behzad Abbasi>// - **[9444a5472](https://github.com/facebook/react/commit/9444a5472 )**: Warn on nested EventTragets in experimental event API (#15287) //<Dominic Gannaway>// - **[7f1f5ddc3](https://github.com/facebook/react/commit/7f1f5ddc3 )**: Rename press props in experimental event API (#15263) //<Nicolas Gallagher>// - **[2e02469fa](https://github.com/facebook/react/commit/2e02469fa )**: ReactNative's ref.measureLayout now takes a ref (#15126) //<Eli White>// - **[1b94fd215](https://github.com/facebook/react/commit/1b94fd215 )**: Make setNativeProps a no-op with Fabric renderer (#15094) //<Eli White>// - **[08055a625](https://github.com/facebook/react/commit/08055a625 )**: Fix Press module in experimental event API (#15262) //<Nicolas Gallagher>// - **[f4625f518](https://github.com/facebook/react/commit/f4625f518 )**: Fix on(Long)PressChange events in experimental press event API (#15256) //<Nicolas Gallagher>// - **[a41b21770](https://github.com/facebook/react/commit/a41b21770 )**: Add additional event API responder surfaces (#15248) //<Dominic Gannaway>// - **[700f17be6](https://github.com/facebook/react/commit/700f17be6 )**: Fix longpress in experimental Press event module (#15246) //<Nicolas Gallagher>// - **[5d336df70](https://github.com/facebook/react/commit/5d336df70 )**: Allow for null targetFiber for root event handling (#15247) //<Dominic Gannaway>// - **[c6f3524df](https://github.com/facebook/react/commit/c6f3524df )**: Adds React event component and React event target support to SSR renderer (#15242) //<Dominic Gannaway>// - **[c7a2dce50](https://github.com/facebook/react/commit/c7a2dce50 )**: Disable JS urls at build level for www (#15230) //<Sebastian Markbåge>// - **[fb6b50871](https://github.com/facebook/react/commit/fb6b50871 )**: Update versions for 16.8.6 //<Dan Abramov>// - **[1cfd25668](https://github.com/facebook/react/commit/1cfd25668 )**: Fix circular module imports causing file size increase (#15231) //<Dominic Gannaway>// - **[669cafb36](https://github.com/facebook/react/commit/669cafb36 )**: Adds experimental event component responder surfaces (#15228) //<Dominic Gannaway>// - **[d8cb10f11](https://github.com/facebook/react/commit/d8cb10f11 )**: Enabled warnAboutDeprecatedLifecycles flag by default (#15186) //<Brian Vaughn>// - **[80f8b0d51](https://github.com/facebook/react/commit/80f8b0d51 )**: Add part of the event responder system for experimental event API (#15179) //<Dominic Gannaway>// - **[5c2b2c085](https://github.com/facebook/react/commit/5c2b2c085 )**: Warn about async infinite useEffect loop (#15180) //<Dan Abramov>// - **[8e9a013c0](https://github.com/facebook/react/commit/8e9a013c0 )**: Release 16.8.5 //<Dan Abramov>// - **[f33e5790b](https://github.com/facebook/react/commit/f33e5790b )**: eslint-plugin-react-hooks@1.6.0 //<Dan Abramov>// - **[b1cccd1ed](https://github.com/facebook/react/commit/b1cccd1ed )**: Warn about setState directly in dep-less useEffect (#15184) //<Dan Abramov>// - **[78f2775ed](https://github.com/facebook/react/commit/78f2775ed )**: Flip event passive logic on passiveBrowserEventsSupported (#15190) //<Dominic Gannaway>// - **[f161ee2eb](https://github.com/facebook/react/commit/f161ee2eb )**: React.warn() and React.error() (#15170) //<Brian Vaughn>// - **[78968bb3d](https://github.com/facebook/react/commit/78968bb3d )**: Validate useEffect without deps too (#15183) //<Dan Abramov>// - **[4b8e1641b](https://github.com/facebook/react/commit/4b8e1641b )**: Fork performWork instead of using boolean flag (#15169) //<Sebastian Markbåge>// - **[56035dac6](https://github.com/facebook/react/commit/56035dac6 )**: unstable_Profiler -> Profiler (#15172) //<Brian Vaughn>// - **[31518135c](https://github.com/facebook/react/commit/31518135c )**: Strengthen nested update counter test coverage (#15166) //<Dan Abramov>// - **[66f280c87](https://github.com/facebook/react/commit/66f280c87 )**: Add internal logic for listening to event responders (#15168) //<Dominic Gannaway>// - **[b1a56abd6](https://github.com/facebook/react/commit/b1a56abd6 )**: Fork ReactFiberScheduler with feature flag //<Andrew Clark>// - **[45f571736](https://github.com/facebook/react/commit/45f571736 )**: ReactFiberScheduler -> ReactFiberScheduler.old //<Andrew Clark>// - **[c05b4b81f](https://github.com/facebook/react/commit/c05b4b81f )**: Link to useLayoutEffect gist in a warning (#15158) //<Dan Abramov>// - **[061d6ce3c](https://github.com/facebook/react/commit/061d6ce3c )**: fix(react-dom): access iframe contentWindow instead of contentDocument (#15099) //<Renan Valentin>// - **[b83e01cad](https://github.com/facebook/react/commit/b83e01cad )**: Adds more scaffolding for experimental event API (#15112) //<Dominic Gannaway>// - **[daeda44d8](https://github.com/facebook/react/commit/daeda44d8 )**: Follow up to 15150 (#15152) //<Dominic Gannaway>// - **[acd65db5b](https://github.com/facebook/react/commit/acd65db5b )**: Deprecate module pattern (factory) components (#15145) //<Sebastian Markbåge>// - **[55cc921c5](https://github.com/facebook/react/commit/55cc921c5 )**: Adds react-events package for internal testing (#15150) //<Dominic Gannaway>// - **[7ad738630](https://github.com/facebook/react/commit/7ad738630 )**: Improve warning for invalid class contextType (#15142) //<Dan Abramov>// - **[1e3364e76](https://github.com/facebook/react/commit/1e3364e76 )**: Test that we don't suspend when disabling yielding (#15143) //<Sebastian Markbåge>// - **[42c3c967d](https://github.com/facebook/react/commit/42c3c967d )**: Compile invariant directly to throw expressions (#15071) //<Andrew Clark>// - **[df7b87d25](https://github.com/facebook/react/commit/df7b87d25 )**: Warn for Context.Consumer with contextType (#14831) //<Brandon Dail>// - **[2b93d686e](https://github.com/facebook/react/commit/2b93d686e )**: Add more info to invalid hook call error message (#15139) //<Jared Palmer>// - **[d926936f0](https://github.com/facebook/react/commit/d926936f0 )**: Eager bailout optimization should always compare to latest reducer (#15124) //<Andrew Clark>// - **[4162f6026](https://github.com/facebook/react/commit/4162f6026 )**: Add feature flag to disable yielding (#15119) //<Sebastian Markbåge>// - **[8d60bd4dc](https://github.com/facebook/react/commit/8d60bd4dc )**: [Shallow] Implement setState for Hooks and remount on type change (#15120) //<Dan Abramov>// - **[035e4cffb](https://github.com/facebook/react/commit/035e4cffb )**: Change passive checker to use defineProperty (#15121) //<Dominic Gannaway>// - **[b283d75c1](https://github.com/facebook/react/commit/b283d75c1 )**: Support React.memo in ReactShallowRenderer (#14816) //<Brandon Dail>// - **[f0621fe23](https://github.com/facebook/react/commit/f0621fe23 )**: Use same example code for async effect warning (#15118) //<Dan Abramov>// - **[52c870c8d](https://github.com/facebook/react/commit/52c870c8d )**: Fix shallow renderer not allowing hooks in forwardRef render functions (#15100) //<Sebastian Silbermann>// - **[f1ff4348c](https://github.com/facebook/react/commit/f1ff4348c )**: Don't suggest a function as its own dep (#15115) //<Dan Abramov>// - **[371bbf36b](https://github.com/facebook/react/commit/371bbf36b )**: Add infrastructure for passive/non-passive event support for future API exploration (#15036) //<Dominic Gannaway>// - **[ab5fe174c](https://github.com/facebook/react/commit/ab5fe174c )**: Don't set the first option as selected in select tag with `size` attribute (#14242) //<Mateusz>// - **[935f60083](https://github.com/facebook/react/commit/935f60083 )**: eslint-plugin-react-hooks@1.5.1 //<Dan Abramov>// - **[0c03a4743](https://github.com/facebook/react/commit/0c03a4743 )**: Adds experimental event API scaffolding (#15108) //<Dominic Gannaway>// - **[1204c7897](https://github.com/facebook/react/commit/1204c7897 )**: [eslint] Wording tweaks (#15078) //<Sophie Alpert>// - **[9d77a317b](https://github.com/facebook/react/commit/9d77a317b )**: Improve async useEffect warning (#15104) //<Dan Abramov>// - **[103378b1e](https://github.com/facebook/react/commit/103378b1e )**: Warn for javascript: URLs in DOM sinks (#15047) //<Sebastian Markbåge>// - **[5d0c3c6c7](https://github.com/facebook/react/commit/5d0c3c6c7 )**: [Partial Hydration] Render client-only content at normal priority (#15061) //<Sebastian Markbåge>// - **[6a4a261ee](https://github.com/facebook/react/commit/6a4a261ee )**: Test suspended children are hidden before layout in persistent mode (#15030) //<Andrew Clark>// - **[bc8bd24c1](https://github.com/facebook/react/commit/bc8bd24c1 )**: Run persistent mode tests in CI (#15029) //<Andrew Clark>// - **[3f4852fa5](https://github.com/facebook/react/commit/3f4852fa5 )**: Run Placeholder tests in persistent mode, too (#15013) //<Andrew Clark>// - **[d0289c7e3](https://github.com/facebook/react/commit/d0289c7e3 )**: eslint-plugin-react-hooks@1.5.0 //<Dan Abramov>// - **[03ad9c73e](https://github.com/facebook/react/commit/03ad9c73e )**: [ESLint] Tweak setState updater message and add useEffect(async) warning (#15055) //<Dan Abramov>// - **[eb6247a9a](https://github.com/facebook/react/commit/eb6247a9a )**: More concise messages (#15053) //<Dan Abramov>// - **[197703ecc](https://github.com/facebook/react/commit/197703ecc )**: [ESLint] Add more hints to lint messages (#15046) //<Dan Abramov>// - **[6d2666bab](https://github.com/facebook/react/commit/6d2666bab )**: Fix ESLint rule crash (#15044) //<Dan Abramov>// - **[9b7e1d138](https://github.com/facebook/react/commit/9b7e1d138 )**: [ESLint] Suggest moving inside a Hook or useCallback when bare function is a dependency (#15026) //<Dan Abramov>// - **[1e3b6192b](https://github.com/facebook/react/commit/1e3b6192b )**: Import Scheduler directly, not via host config (#14984) //<Andrew Clark>// - **[5d49dafac](https://github.com/facebook/react/commit/5d49dafac )**: Enforce deps array in useMemo and useCallback (#15025) //<Dan Abramov>// - **[a9aa24ed8](https://github.com/facebook/react/commit/a9aa24ed8 )**: 16.8.4 and changelog //<Brian Vaughn>// - **[fa5d4ee43](https://github.com/facebook/react/commit/fa5d4ee43 )**: [ESLint] Treat functions that don't capture anything as static (#14996) //<Dan Abramov>// - **[fd557d453](https://github.com/facebook/react/commit/fd557d453 )**: Warn on mount when deps are not an array (#15018) //<Dan Abramov>// - **[ce45ca9ba](https://github.com/facebook/react/commit/ce45ca9ba )**: Prettier //<Andrew Clark>// - **[757a70b25](https://github.com/facebook/react/commit/757a70b25 )**: ReactNoop.yield -> Scheduler.yieldValue (#15008) //<Andrew Clark>// - **[9d756d903](https://github.com/facebook/react/commit/9d756d903 )**: Revert #14756 changes to ReactFiberScheduler (#14992) //<Andrew Clark>// - **[f16442a10](https://github.com/facebook/react/commit/f16442a10 )**: eslint-plugin-react-hooks@1.4.0 //<Dan Abramov>// - **[e1e45fb36](https://github.com/facebook/react/commit/e1e45fb36 )**: [ESLint] Suggest to destructure props when they are only used as members (#14993) //<Dan Abramov>// - **[59ef28437](https://github.com/facebook/react/commit/59ef28437 )**: Warn about dependencies outside of render scope (#14990) //<Dan Abramov>// - **[df7b4768c](https://github.com/facebook/react/commit/df7b4768c )**: [ESLint] Deduplicate suggested dependencies (#14982) //<Dan Abramov>// - **[02404d793](https://github.com/facebook/react/commit/02404d793 )**: Avoid dynamic dispatch for scheduler calls (#14968) //<Dan Abramov>// - **[bb2939ccc](https://github.com/facebook/react/commit/bb2939ccc )**: Support editable useState hooks in DevTools (#14906) //<Brian Vaughn>// - **[69060e1da](https://github.com/facebook/react/commit/69060e1da )**: Swap expect(ReactNoop) for expect(Scheduler) (#14971) //<Andrew Clark>// - **[ccb2a8a44](https://github.com/facebook/react/commit/ccb2a8a44 )**: Replace test renderer's fake Scheduler implementation with mock build (#14970) //<Andrew Clark>// - **[53e787b45](https://github.com/facebook/react/commit/53e787b45 )**: Replace noop's fake Scheduler implementation with mock Scheduler build (#14969) //<Andrew Clark>// - **[3ada82b74](https://github.com/facebook/react/commit/3ada82b74 )**: Allow extraneous effect dependencies (#14967) //<Dan Abramov>// - **[00748c53e](https://github.com/facebook/react/commit/00748c53e )**: Add new mock build of Scheduler with flush, yield API (#14964) //<Andrew Clark>// - **[4186952a6](https://github.com/facebook/react/commit/4186952a6 )**: Fixed incompatibility between react-debug-tools and useContext() (#14940) //<Brian Vaughn>// - **[0b8efb229](https://github.com/facebook/react/commit/0b8efb229 )**: Allow omitting constant primitive deps (#14959) //<Dan Abramov>// Changelog: [General][Changed] - React sync for revisions 8e25ed2...ec6691a Follow steps in the [React Native test plan](https://our.intern.facebook.com/intern/dex/react/test-workflows-react-native/). Reviewed By: shergin Differential Revision: D15171103 fbshipit-source-id: d16b54dfd575b3a1fa38e6a132633f42c715b4fd
React Native
Learn once, write anywhere:
Build mobile apps with React.
Getting Started · Learn the Basics · Showcase · Contribute · Community · Support
React Native brings React's declarative UI framework to iOS and Android. With React Native, you use native UI controls and have full access to the native platform.
- Declarative. React makes it painless to create interactive UIs. Declarative views make your code more predictable and easier to debug.
- Component-Based. Build encapsulated components that manage their own state, then compose them to make complex UIs.
- Developer Velocity. See local changes in seconds. Changes to JavaScript code can be live reloaded without rebuilding the native app.
- Portability. Reuse code across iOS, Android, and other platforms.
React Native is developed and supported by many companies and individual core contributors. Find out more in our ecosystem overview.
Contents
- Requirements
- Building your first React Native app
- Documentation
- Upgrading
- How to Contribute
- Code of Conduct
- License
📋 Requirements
React Native apps may target iOS 9.0 and Android 4.1 (API 16) or newer. You may use Windows, macOS, or Linux as your development operating system, though building and running iOS apps is limited to macOS. Tools like Expo can be used to work around this.
🎉 Building your first React Native app
Follow the Getting Started guide. The recommended way to install React Native depends on your project. Here you can find short guides for the most common scenarios:
📖 Documentation
The full documentation for React Native can be found on our website.
The React Native documentation discusses components, APIs, and topics that are specific to React Native. For further documentation on the React API that is shared between React Native and React DOM, refer to the React documentation.
The source for the React Native documentation and website is hosted on a separate repo, @facebook/react-native-website.
🚀 Upgrading
Upgrading to new versions of React Native may give you access to more APIs, views, developer tools and other goodies. See the Upgrading Guide for instructions.
React Native releases are discussed in the React Native Community, @react-native-community/react-native-releases.
👏 How to Contribute
The main purpose of this repository is to continue evolving React Native core. We want to make contributing to this project as easy and transparent as possible, and we are grateful to the community for contributing bugfixes and improvements. Read below to learn how you can take part in improving React Native.
Code of Conduct
Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.
Contributing Guide
Read our Contributing Guide to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes to React Native.
Open Source Roadmap
You can learn more about our vision for React Native in the Roadmap.
Good First Issues
We have a list of good first issues that contain bugs which have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.
Discussions
Larger discussions and proposals are discussed in @react-native-community/discussions-and-proposals.
📄 License
React Native is MIT licensed, as found in the LICENSE file.
React Native documentation is Creative Commons licensed, as found in the LICENSE-docs file.