16.5.0 (September 5, 2018)

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)

16.4.2 (August 1, 2018)

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)

16.4.1 (June 13, 2018)

React

• You can now assign propTypes to components returned by React.ForwardRef. (@bvaughn in #12911)

React DOM

• Fix a crash when the input type changes from some other types to text. (@spirosikmd in #12135)
• Fix a crash in IE11 when restoring focus to an SVG element. (@ThaddeusJiang in #12996)
• Fix a range input not updating in some cases. (@Illu in #12939)
• Fix input validation triggering unnecessarily in Firefox. (@nhunzaker in #12925)
• Fix an incorrect event.target value for the onChange event in IE9. (@nhunzaker in #12976)
• Fix a false positive error when returning an empty <React.Fragment /> from a component. (@philipp-spiess in #12966)

React DOM Server

• Fix an incorrect value being provided by new context API. (@ericsoderberghp in #12985, @gaearon in #13019)

React Test Renderer

• Allow multiple root children in test renderer traversal API. (@gaearon in #13017)
• Fix getDerivedStateFromProps() in the shallow renderer to not discard the pending state. (@fatfisz in #13030)

16.4.0 (May 23, 2018)

React

• Add a new experimental React.unstable_Profiler component for measuring performance. (@bvaughn in #12745)

React DOM

• Add support for the Pointer Events specification. (@philipp-spiess in #12507)
• Properly call getDerivedStateFromProps() regardless of the reason for re-rendering. (@acdlite in #12600 and #12802)
• Fix a bug that prevented context propagation in some cases. (@gaearon in #12708)
• Fix re-rendering of components using forwardRef() on a deeper setState(). (@gaearon in #12690)
• Fix some attributes incorrectly getting removed from custom element nodes. (@airamrguez in #12702)
• Fix context providers to not bail out on children if there's a legacy context provider above. (@gaearon in #12586)
• Add the ability to specify propTypes on a context provider component. (@nicolevy in #12658)
• Fix a false positive warning when using react-lifecycles-compat in <StrictMode>. (@bvaughn in #12644)
• Warn when the forwardRef() render function has propTypes or defaultProps. (@bvaughn in #12644)
• Improve how forwardRef() and context consumers are displayed in the component stack. (@sophiebits in #12777)
• Change internal event names. This can break third-party packages that rely on React internals in unsupported ways. (@philipp-spiess in #12629)

React Test Renderer

• Fix the getDerivedStateFromProps() support to match the new React DOM behavior. (@koba04 in #12676)
• Fix a testInstance.parent crash when the parent is a fragment or another special node. (@gaearon in #12813)
• forwardRef() components are now discoverable by the test renderer traversal methods. (@gaearon in #12725)
• Shallow renderer now ignores setState() updaters that return null or undefined. (@koba04 in #12756)

React ART

• Fix reading context provided from the tree managed by React DOM. (@acdlite in #12779)

React Call Return (Experimental)

• This experiment was deleted because it was affecting the bundle size and the API wasn't good enough. It's likely to come back in the future in some other form. (@gaearon in #12820)

React Reconciler (Experimental)

• The new host config shape is flat and doesn't use nested objects. (@gaearon in #12792)

16.3.2 (April 16, 2018)

React

• Improve the error message when passing null or undefined to React.cloneElement. (@nicolevy in #12534)

React DOM

• Fix an IE crash in development when using <StrictMode>. (@bvaughn in #12546)
• Fix labels in User Timing measurements for new component types. (@bvaughn in #12609)
• Improve the warning about wrong component type casing. (@nicolevy in #12533)
• Improve general performance in development mode. (@gaearon in #12537)
• Improve performance of the experimental unstable_observedBits API with nesting. (@gaearon in #12543)

React Test Renderer

• Add a UMD build. (@bvaughn in #12594)

16.3.1 (April 3, 2018)

React

• Fix a false positive warning in IE11 when using Fragment. (@heikkilamarko in #12504)
• Prefix a private API. (@Andarist in #12501)
• Improve the warning when calling setState() in constructor. (@gaearon in #12532)

React DOM

• Fix getDerivedStateFromProps() not getting applied in some cases. (@acdlite in #12528)
• Fix a performance regression in development mode. (@gaearon in #12510)
• Fix error handling bugs in development mode. (@gaearon and @acdlite in #12508)
• Improve user timing API messages for profiling. (@flarnie in #12384)

Create Subscription

• Set the package version to be in sync with React releases. (@bvaughn in #12526)
• Add a peer dependency on React 16.3+. (@NMinhNguyen in #12496)

16.3.0 (March 29, 2018)

React

• Add a new officially supported context API. (@acdlite in #11818)
• Add a new React.createRef() API as an ergonomic alternative to callback refs. (@trueadm in #12162)
• Add a new React.forwardRef() API to let components forward their refs to a child. (@bvaughn in #12346)
• Fix a false positive warning in IE11 when using React.Fragment. (@XaveScor in #11823)
• Replace React.unstable_AsyncComponent with React.unstable_AsyncMode. (@acdlite in #12117)
• Improve the error message when calling setState() on an unmounted component. (@sophiebits in #12347)

React DOM

• Add a new getDerivedStateFromProps() lifecycle and UNSAFE_ aliases for the legacy lifecycles. (@bvaughn in #12028)
• Add a new getSnapshotBeforeUpdate() lifecycle. (@bvaughn in #12404)
• Add a new <React.StrictMode> wrapper to help prepare apps for async rendering. (@bvaughn in #12083)
• Add support for onLoad and onError events on the <link> tag. (@roderickhsiao in #11825)
• Add support for noModule boolean attribute on the <script> tag. (@aweary in #11900)
• Fix minor DOM input bugs in IE and Safari. (@nhunzaker in #11534)
• Correctly detect Ctrl + Enter in onKeyPress in more browsers. (@nstraub in #10514)
• Fix containing elements getting focused on SSR markup mismatch. (@koba04 in #11737)
• Fix value and defaultValue to ignore Symbol values. (@nhunzaker in #11741)
• Fix refs to class components not getting cleaned up when the attribute is removed. (@bvaughn in #12178)
• Fix an IE/Edge issue when rendering inputs into a different window. (@M-ZubairAhmed in #11870)
• Throw with a meaningful message if the component runs after jsdom has been destroyed. (@gaearon in #11677)
• Don't crash if there is a global variable called opera with a null value. @alisherdavronov in #11854)
• Don't check for old versions of Opera. (@skiritsis in #11921)
• Deduplicate warning messages about <option selected>. (@watadarkstar in #11821)
• Deduplicate warning messages about invalid callback. (@yenshih in #11833)
• Deprecate ReactDOM.unstable_createPortal() in favor of ReactDOM.createPortal(). (@prometheansacrifice in #11747)
• Don't emit User Timing entries for context types. (@abhaynikam in #12250)
• Improve the error message when context consumer child isn't a function. (@raunofreiberg in #12267)
• Improve the error message when adding a ref to a functional component. (@skiritsis in #11782)

React DOM Server

• Prevent an infinite loop when attempting to render portals with SSR. (@gaearon in #11709)
• Warn if a class doesn't extend React.Component. (@wyze in #11993)
• Fix an issue with this.state of different components getting mixed up. (@sophiebits in #12323)
• Provide a better message when component type is undefined. (@HeroProtagonist in #11966)

React Test Renderer

• Fix handling of fragments in toTree(). (@maciej-ka in #12107 and @gaearon in #12154)
• Shallow renderer should assign state to null for components that don't set it. (@jwbay in #11965)
• Shallow renderer should filter legacy context according to contextTypes. (@koba04 in #11922)
• Add an unstable API for testing asynchronous rendering. (@acdlite in #12478)

React Is (New)

• First release of the new package that libraries can use to detect different React node types. (@bvaughn in #12199)
• Add ReactIs.isValidElementType() to help higher-order components validate their inputs. (@jamesreggio in #12483)

React Lifecycles Compat (New)

• First release of the new package to help library developers target multiple versions of React. (@bvaughn in #12105)

Create Subscription (New)

• First release of the new package to subscribe to external data sources safely for async rendering. (@bvaughn in #12325)

React Reconciler (Experimental)

• Expose react-reconciler/persistent for building renderers that use persistent data structures. (@gaearon in #12156)
• Pass host context to finalizeInitialChildren(). (@jquense in #11970)
• Remove useSyncScheduling from the host config. (@acdlite in #11771)

React Call Return (Experimental)

• Fix a crash on updates. (@rmhartog in #11955)