React v15

https://github.com/facebook/react

v15.7.0

#

React

Created Published Prerelease Draft

v15.6.2

#

15.6.2 (September 25, 2017)

All Packages

  • Switch from BSD + Patents to MIT license

React DOM

  • Fix a bug where modifying document.documentMode would trigger IE detection in other browsers, breaking change events. (@aweary in #10032)
  • CSS Columns are treated as unitless numbers. (@aweary in #10115)
  • Fix bug in QtWebKit when wrapping synthetic events in proxies. (@walrusfruitcake in #10115)
  • Prevent event handlers from receiving extra argument in development. (@aweary in #10115)
  • Fix cases where onChange would not fire with defaultChecked on radio inputs. (@jquense in #10156)
  • Add support for controlList attribute to DOM property whitelist (@nhunzaker in #9940)
  • Fix a bug where creating an element with a ref in a constructor did not throw an error in development. (@iansu in #10025)
Created Published Prerelease Draft

v15.6.1

#

15.6.1 (June 14, 2017)

React DOM

Created Published Prerelease Draft

v15.6.0

#

15.6.0 (June 13, 2017)

React

  • Downgrade deprecation warnings to use console.warn instead of console.error. (@flarnie in #9753)
  • Add a deprecation warning for React.createClass. Points users to create-react-class instead. (@flarnie in #9771)
  • Add deprecation warnings and separate module for React.DOM factory helpers. (@nhunzaker in #8356)
  • Warn for deprecation of React.createMixin helper, which was never used. (@aweary in #8853)

React DOM

  • Add support for CSS variables in style attribute. (@aweary in #9302)
  • Add support for CSS Grid style properties. (@ericsakmar in #9185)
  • Fix bug where inputs mutated value on type conversion. (@nhunzaker in #9806)
  • Fix issues with onChange not firing properly for some inputs. (@jquense in #8575)
  • Fix bug where controlled number input mistakenly allowed period. (@nhunzaker in #9584)
  • Fix bug where performance entries were being cleared. (@chrisui in #9451)

React Addons

  • Fix AMD support for addons depending on react. (@flarnie in #9919)
  • Fix isMounted() to return true in componentWillUnmount. (@mridgway in #9638)
  • Fix react-addons-update to not depend on native Object.assign. (@gaearon in #9937)
  • Remove broken Google Closure Compiler annotation from create-react-class. (@gaearon in #9933)
  • Remove unnecessary dependency from react-linked-input. (@gaearon in #9766)
  • Point react-addons-(css-)transition-group to the new package. (@gaearon in #9937)
Created Published Prerelease Draft

v15.5.4

#

15.5.4 (April 11, 2017)

React Addons

  • Critical Bugfix: Update the version of prop-types to fix critical bug. (@gaearon in 545c87f)
  • Fix react-addons-create-fragment package to include loose-envify transform for Browserify users. (@mridgway in #9642)

React Test Renderer

  • Fix compatibility with Enzyme by exposing batchedUpdates on shallow renderer. (@gaearon in #9382)
Created Published Prerelease Draft

v15.5.3

#

15.5.3 (April 7, 2017)

Note: this release has a critical issue and was deprecated. Please update to 15.5.4 or higher.

React Addons

  • Fix react-addons-create-fragment package to export correct thing. (@gaearon in #9385)
  • Fix create-react-class package to include loose-envify transform for Browserify users. (@mridgway in #9642)
Created Published Prerelease Draft

v15.5.2

#

15.5.2 (April 7, 2017)

Note: this release has a critical issue and was deprecated. Please update to 15.5.4 or higher.

React Addons

  • Fix the production single-file builds to not include the development code. (@gaearon in #9385)
  • Apply better minification to production single-file builds. (@gaearon in #9385)
  • Add missing and remove unnecessary dependencies to packages. (@gaearon in #9385)
Created Published Prerelease Draft

v15.5.1

#

15.5.1 (April 7, 2017)

Note: this release has a critical issue and was deprecated. Please update to 15.5.4 or higher.

React

Created Published Prerelease Draft

v15.5.0

#

15.5.0 (April 7, 2017)

Note: this release has a critical issue and was deprecated. Please update to 15.5.4 or higher.

React

  • Added a deprecation warning for React.createClass. Points users to create-react-class instead. (@acdlite in d9a4fa4)
  • Added a deprecation warning for React.PropTypes. Points users to prop-types instead. (@acdlite in 043845c)
  • Fixed an issue when using ReactDOM together with ReactDOMServer. (@wacii in #9005)
  • Fixed issue with Closure Compiler. (@anmonteiro in #8895)
  • Another fix for Closure Compiler. (@Shastel in #8882)
  • Added component stack info to invalid element type warning. (@n3tr in #8495)

React DOM

  • Fixed Chrome bug when backspacing in number inputs. (@nhunzaker in #7359)
  • Added react-dom/test-utils, which exports the React Test Utils. (@bvaughn)

React Test Renderer

  • Fixed bug where componentWillUnmount was not called for children. (@gre in #8512)
  • Added react-test-renderer/shallow, which exports the shallow renderer. (@bvaughn)

React Addons

  • Last release for addons; they will no longer be actively maintained.
  • Removed peerDependencies so that addons continue to work indefinitely. (@acdlite and @bvaughn in 8a06cd7 and 67a8db3)
  • Updated to remove references to React.createClass and React.PropTypes (@acdlite in 12a96b9)
  • react-addons-test-utils is deprecated. Use react-dom/test-utils and react-test-renderer/shallow instead. (@bvaughn)
Created Published Prerelease Draft

v15.4.2

#

15.4.2 (January 6, 2017)

React

React DOM

  • Fixed a decimal point issue on uncontrolled number inputs. (@nhunzaker in #7750)
  • Fixed rendering of textarea placeholder in IE11. (@aweary in #8020)
  • Worked around a script engine bug in IE9. (@eoin in #8018)

React Addons

Created Published Prerelease Draft

v15.4.1

#

React

  • Restructure variable assignment to work around a Rollup bug (@gaearon in #8384)

React DOM

  • Fixed event handling on disabled button elements (@spicyj in #8387)
  • Fixed compatibility of browser build with AMD environments (@zpao in #8374)
Created Published Prerelease Draft

v15.4.0

#

React

  • React package and browser build no longer "secretly" includes React DOM. (@sebmarkbage in #7164 and #7168)
  • Required PropTypes now fail with specific messages for null and undefined. (@chenglou in #7291)
  • Improved development performance by freezing children instead of copying. (@keyanzhang in #7455)

React DOM

  • Fixed occasional test failures when React DOM is used together with shallow renderer. (@goatslacker in #8097)
  • Added a warning for invalid aria- attributes. (@jessebeach in #7744)
  • Added a warning for using autofocus rather than autoFocus. (@hkal in #7694)
  • Removed an unnecessary warning about polyfilling String.prototype.split. (@nhunzaker in #7629)
  • Clarified the warning about not calling PropTypes manually. (@jedwards1211 in #7777)
  • The unstable batchedUpdates API now passes the wrapped function's return value through. (@bgnorlov in #7444)
  • Fixed a bug with updating text in IE 8. (@mnpenner in #7832)

React Perf

  • When ReactPerf is started, you can now view the relative time spent in components as a chart in Chrome Timeline. (@gaearon in #7549)

React Test Utils

  • If you call Simulate.click() on a <input disabled onClick={foo} /> then foo will get called whereas it didn't before. (@nhunzaker in #7642)

React Test Renderer

  • Due to packaging changes, it no longer crashes when imported together with React DOM in the same file. (@sebmarkbage in #7164 and #7168)
  • ReactTestRenderer.create() now accepts {createNodeMock: element => mock} as an optional argument so you can mock refs with snapshot testing. (@Aweary in #7649, #8261)
Created Published Prerelease Draft

v15.3.2

#

React

  • Remove plain object warning from React.createElement & React.cloneElement. (@spudly in #7724)

React DOM

  • Add playsInline to supported HTML attributes. (@reaperhulk in #7519)
  • Add as to supported HTML attributes. (@kevinslin in #7582)
  • Improve DOM nesting validation warning about whitespace. (@spicyj in #7515)
  • Avoid "Member not found" exception in IE10 when calling preventDefault() in Synthetic Events. (@g-palmer in #7411)
  • Fix memory leak in onSelect implementation. (@AgtLucas in #7533)
  • Improve robustness of document.documentMode checks to handle Google Tag Manager. (@SchleyB in #7594)
  • Add more cases to controlled inputs warning. (@marcin-mazurek in #7544)
  • Handle case of popup blockers overriding document.createEvent. (@Andarist in #7621)
  • Fix issue with dangerouslySetInnerHTML and SVG in Internet Explorer. (@zpao in #7618)
  • Improve handling of Japanese IME on Internet Explorer. (@msmania in #7107)

React Test Renderer

React Perf Add-on

  • Ensure lifecycle timers are stopped on errors. (@gaearon in #7548)
Created Published Prerelease Draft

v15.3.1

#

React

React DOM

  • Avoid <input> validation warning from browsers when changing type. (@nhunzaker in #7333)
  • Avoid "Member not found" exception in IE10 when calling stopPropagation() in Synthetic Events. (@nhunzaker in #7343)
  • Fix issue resulting in inability to update some <input> elements in mobile browsers. (@keyanzhang in #7397)
  • Fix memory leak in server rendering. (@keyanzhang in #7410)
  • Fix issue resulting in <input type="range"> values not updating when changing min or max. (@troydemonbreun in #7486)
  • Add new warning for rare case of attempting to unmount a container owned by a different copy of React. (@ventuno in #7456)

React Test Renderer

  • Fix ReactTestInstance::toJSON() with empty top-level components. (@Morhaus in #7523)

React Native Renderer

  • Change trackedTouchCount invariant into a console.error for better reliability. (@yungsters in #7400)
Created Published Prerelease Draft

v15.3.0

#

React

  • Add React.PureComponent - a new base class to extend, replacing react-addons-pure-render-mixin now that mixins don't work with ES2015 classes. (@spicyj in #7195)
  • Add new warning when modifying this.props.children. (@jimfb in #7001)
  • Fixed issue with ref resolution order. (@gaearon in #7101)
  • Warn when mixin is undefined. (@swaroopsm in #6158)
  • Downgrade "unexpected batch number" invariant to a warning. (@spicyj in #7133)
  • Validate arguments to oneOf and oneOfType PropTypes sooner. (@troydemonbreun in #6316)
  • Warn when calling PropTypes directly. (@Aweary in #7132, #7194)
  • Improve warning when using Maps as children. (@keyanzhang in #7260)
  • Add additional type information to the PropTypes.element warning. (@alexzherdev in #7319)
  • Improve component identification in no-op setState warning. (@keyanzhang in #7326)

React DOM

  • Fix issue with nested server rendering. (@Aweary in #7033)
  • Add xmlns, xmlnsXlink to supported SVG attributes. (@salzhrani in #6471)
  • Add referrerPolicy to supported HTML attributes. (@Aweary in #7274)
  • Fix issue resulting in <input type="range"> initial value being rounded. (@troydemonbreun in #7251)

React Test Renderer

React Perf Add-on

  • Fix issue resulting in excessive warnings when encountering an internal measurement error. (@sassanh in #7299)

React TestUtils Add-on

  • Implement type property on for events created via TestUtils.Simulate.*. (@yaycmyk in #6154)
  • Fix crash when running TestUtils with the production build of React. (@gaearon in #7246)
Created Published Prerelease Draft

v15.2.1

#

React

  • Fix errant warning about missing React element. (@gaearon in #7193)
  • Better removal of dev-only code, leading to a small reduction in the minified production bundle size. (@gaearon in #7188, #7189)

React DOM

  • Add stack trace to null input value warning. (@jimfb in #7040)
  • Fix webcomponents example. (@jalexanderfox in #7057)
  • Fix unstable_renderSubtreeIntoContainer so that context properly updates when linked to state. (@gaearon in #7125)
  • Improve invariant wording for void elements. (@starkch in #7066)
  • Ensure no errors are thrown due to event handlers in server rendering. (@rricard in #7127)
  • Fix regression resulting in value-less submit and reset inputs removing the browser-default text. (@zpao in #7197)
  • Fix regression resulting in empty name attribute being added to inputs when not provided. (@okonet in #7199)
  • Fix issue with nested server rendering. (@Aweary in #7033)

React Perf Add-on

  • Make ReactPerf.start() work properly during lifecycle methods. (@gaearon in #7208).

React CSSTransitionGroup Add-on

  • Fix issue resulting in spurious unknown property warnings. (@batusai513 in #7165)

React Native Renderer

  • Improve error handling in cross-platform touch event handling. (@yungsters in #7143)
Created Published Prerelease Draft

v15.2.0

#

React

  • Add error codes to production invariants, with links to the view the full error text. (@keyanzhang in #6948)
  • Include component stack information in PropType validation warnings. (@spicyj in #6771)
  • Include component stack information in key warnings. (@keyanzhang in #6799)
  • Stop validating props at mount time, only validate at element creation. (@keyanzhang in #6823)
  • New invariant providing actionable error in missing instance case. (@yungsters in #6990)
  • Add React.PropTypes.symbol to support ES2015 Symbols as props. (@puradox in #6377)
  • Fix incorrect coercion of ref or key that are undefined in development (@gaearon in #6880)
  • Fix a false positive when passing other element’s props to cloneElement (@ericmatthys in #6268)

React DOM

  • Add warning for unknown properties on DOM elements. (@jimfb in #6800, @gm758 in #7152)
  • Properly remove attributes from custom elements. (@grassator in #6748)
  • Fix invalid unicode escape in attribute name regular expression. (@nbjahan in #6772)
  • Add onLoad handling to <link> element. (@roderickhsiao in #6815)
  • Add onError handling to <source> element. (@wadahiro in #6941)
  • Handle value and defaultValue more accurately in the DOM. (@jimfb in #6406)
  • Fix events issue in environments with mutated Object.prototype. (@Weizenlol in #6886)
  • Fix issue where is="null" ended up in the DOM in Firefox. (@darobin in #6896)
  • Improved performance of text escaping by using escape-html. (@aickin in #6862)
  • Fix issue with dangerouslySetInnerHTML and SVG in Internet Explorer. (@joshhunt in #6982)
  • Fix issue with <textarea> placeholders. (@jimfb in #7002)
  • Fix controlled vs uncontrolled detection of <input type="radio"/>. (@jimfb in #7003)
  • Improve performance of updating text content. (@trueadm in #7005)
  • Ensure controlled <select> components behave the same on initial render as they do on updates. (@yiminghe in #5362)

React Perf Add-on

React CSSTransitionGroup Add-on

React Native Renderer

  • Dependencies on React Native modules use CommonJS requires instead of providesModule. (@davidaurelio in #6715)
Created Published Prerelease Draft

v15.1.0

#

React

  • Ensure we're using the latest object-assign, which has protection against a non-spec-compliant native Object.assign. (@zpao in #6681)
  • Add a new warning to communicate that props objects passed to createElement must be plain objects. (@richardscarrott in #6134)
  • Fix a batching bug resulting in some lifecycle methods incorrectly being called multiple times. (@spicyj in #6650)

React DOM

  • Fix regression in custom elements support. (@jscissr in #6570)
  • Stop incorrectly warning about using onScroll event handler with server rendering. (@Aweary in #6678)
  • Fix grammar in the controlled input warning. (@jakeboone02 in #6657)
  • Fix issue preventing <object> nodes from being able to read <param> nodes in IE. (@syranide in #6691)
  • Fix issue resulting in crash when using experimental error boundaries with server rendering. (@jimfb in #6694)
  • Add additional information to the controlled input warning. (@borisyankov in #6341)

React Perf Add-on

  • Completely rewritten to collect data more accurately and to be easier to maintain. (@gaearon in #6647, #6046)

React Native Renderer

Created Published Prerelease Draft

v15.0.2

#

React

  • Removed extraneous files from npm package. (@gaearon in #6388)
  • Ensure componentWillUnmount is only called once. (@jimfb in #6613)

ReactDOM

  • Fixed bug resulting in disabled buttons responding to mouse events in IE. (@nhunzaker in #6215)
  • Ensure <option>s are correctly selected when inside <optgroup>. (@trevorsmith in #6442)
  • Restore support for rendering into a shadow root. (@Wildhoney in #6462)
  • Ensure nested <body> elements are caught when warning for invalid markup. (@keyanzhang in #6469)
  • Improve warning when encountering multiple elements with the same key. (@hkal in #6500)

React TestUtils Add-on

  • Ensure that functional components do not have an owner. (@gaearon in #6362)
  • Handle invalid arguments to scryRenderedDOMComponentsWithClass better. (@ipeters90 in #6529)

React Perf Add-on

  • Ignore DOM operations that occur outside the batch operation. (@gaearon in #6516)

React Native Renderer

  • These files are now shipped inside the React npm package. They have no impact on React core or ReactDOM.
Created Published Prerelease Draft

v15.0.1

#

React

  • Restore React.__spread API to unbreak code compiled with some tools making use of this undocumented API. It is now officially deprecated. (@zpao in #6444)

ReactDOM

  • Fixed issue resulting in loss of cursor position in controlled inputs. (@spicyj in #6449)
Created Published Prerelease Draft

v15.0.0

#

Major changes

  • Initial render now uses document.createElement instead of generating HTML. Previously we would generate a large string of HTML and then set node.innerHTML. At the time, this was decided to be faster than using document.createElement for the majority of cases and browsers that we supported. Browsers have continued to improve and so overwhelmingly this is no longer true. By using createElement we can make other parts of React faster. (@spicyj in #5205)
  • data-reactid is no longer on every node. As a result of using document.createElement, we can prime the node cache as we create DOM nodes, allowing us to skip a potential lookup (which used the data-reactid attribute). Root nodes will have a data-reactroot attribute and server generated markup will still contain data-reactid. (@spicyj in #5205)
  • No more extra <span>s. ReactDOM will now render plain text nodes interspersed with comment nodes that are used for demarcation. This gives us the same ability to update individual pieces of text, without creating extra nested nodes. If you were targeting these <span>s in your CSS, you will need to adjust accordingly. You can always render them explicitly in your components. (@mwiencek in #5753)
  • Rendering null now uses comment nodes. Previously null would render to <noscript> elements. We now use comment nodes. This may cause issues if making use of :nth-child CSS selectors. While we consider this rendering behavior an implementation detail of React, it's worth noting the potential problem. ()@spicyj in #5451)
  • Functional components can now return null. We added support for defining stateless components as functions in React 0.14. However, React 0.14 still allowed you to define a class component without extending React.Component or using React.createClass(), so we couldn’t reliably tell if your component is a function or a class, and did not allow returning null from it. This issue is solved in React 15, and you can now return null from any component, whether it is a class or a function. (@jimfb in #5884)
  • Improved SVG support. All SVG tags are now fully supported. (Uncommon SVG tags are not present on the React.DOM element helper, but JSX and React.createElement work on all tag names.) All SVG attributes that are implemented by the browsers should be supported too. If you find any attributes that we have missed, please let us know in this issue. (@zpao in #6243)

Breaking changes

  • No more extra <span>s.
  • React.cloneElement() now resolves defaultProps. We fixed a bug in React.cloneElement() that some components may rely on. If some of the props received by cloneElement() are undefined, it used to return an element with undefined values for those props. We’re changing it to be consistent with createElement(). Now any undefined props passed to cloneElement() are resolved to the corresponding component’s defaultProps. (@truongduy134 in #5997)
  • ReactPerf.getLastMeasurements() is opaque. This change won’t affect applications but may break some third-party tools. We are revamping ReactPerf implementation and plan to release it during the 15.x cycle. The internal performance measurement format is subject to change so, for the time being, we consider the return value of ReactPerf.getLastMeasurements() an opaque data structure that should not be relied upon. (@gaearon in #6286)

Removed deprecations

These deprecations were introduced nine months ago in v0.14 with a warning and are removed:

  • Deprecated APIs are removed from the React top-level export: findDOMNode, render, renderToString, renderToStaticMarkup, and unmountComponentAtNode. As a reminder, they are now available on ReactDOM and ReactDOMServer. (@jimfb in #5832)
  • Deprecated addons are removed: batchedUpdates and cloneWithProps. (@jimfb in #5859, @zpao in #6016)
  • Deprecated component instance methods are removed: setProps, replaceProps, and getDOMNode. (@jimfb in #5570)
  • Deprecated CommonJS react/addons entry point is removed. As a reminder, you should use separate react-addons-* packages instead. This only applies if you use the CommonJS builds. (@gaearon in #6285)
  • Passing children to void elements like <input> was deprecated, and now throws an error. (@jonhester in #3372)
  • React-specific properties on DOM refs (e.g. this.refs.div.props) were deprecated, and are removed now. (@jimfb in #5495)

New deprecations, introduced with a warning

Each of these changes will continue to work as before with a new warning until the release of React 16 so you can upgrade your code gradually.

  • LinkedStateMixin and valueLink are now deprecated due to very low popularity. If you need this, you can use a wrapper component that implements the same behavior: react-linked-input. (@jimfb in #6127)
  • Future versions of React will treat <input value={null}> as a request to clear the input. However, React 0.14 has been ignoring value={null}. React 15 warns you on a null input value and offers you to clarify your intention. To fix the warning, you may explicitly pass an empty string to clear a controlled input, or pass undefined to make the input uncontrolled. (@antoaravinth in #5048)
  • ReactPerf.printDOM() was renamed to ReactPerf.printOperations(), and ReactPerf.getMeasurementsSummaryMap() was renamed to ReactPerf.getWasted(). (@gaearon in #6287)

New helpful warnings

  • If you use a minified copy of the development build, React DOM kindly encourages you to use the faster production build instead. (@spicyj in #5083)
  • React DOM: When specifying a unit-less CSS value as a string, a future version will not add px automatically. This version now warns in this case (ex: writing style={{'{{'}}width: '300'}}. Unitless number values like width: 300 are unchanged. (@pluma in #5140)
  • Synthetic Events will now warn when setting and accessing properties (which will not get cleared appropriately), as well as warn on access after an event has been returned to the pool. (@kentcdodds in #5940 and @koba04 in #5947)
  • Elements will now warn when attempting to read ref and key from the props. (@prometheansacrifice in #5744)
  • React will now warn if you pass a different props object to super() in the constructor. (@prometheansacrifice in #5346)
  • React will now warn if you call setState() inside getChildContext(). (@raineroviir in #6121)
  • React DOM now attempts to warn for mistyped event handlers on DOM elements, such as onclick which should be onClick. (@ali in #5361)
  • React DOM now warns about NaN values in style. (@jontewks in #5811)
  • React DOM now warns if you specify both value and defaultValue for an input. (@mgmcdermott in #5823)
  • React DOM now warns if an input switches between being controlled and uncontrolled. (@TheBlasfem in #5864)
  • React DOM now warns if you specify onFocusIn or onFocusOut handlers as they are unnecessary in React. (@jontewks in #6296)
  • React now prints a descriptive error message when you pass an invalid callback as the last argument to ReactDOM.render(), this.setState(), or this.forceUpdate(). (@conorhastings in #5193 and @gaearon in #6310)
  • Add-Ons: TestUtils.Simulate() now prints a helpful message if you attempt to use it with shallow rendering. (@conorhastings in #5358)
  • PropTypes: arrayOf() and objectOf() provide better error messages for invalid arguments. (@chicoxyzzy in #5390)

Notable bug fixes

  • Fixed multiple small memory leaks. (@spicyj in #4983 and @victor-homyakov in #6309)
  • Input events are handled more reliably in IE 10 and IE 11; spurious events no longer fire when using a placeholder. (@jquense in #4051)
  • The componentWillReceiveProps() lifecycle method is now consistently called when context changes. (@milesj in #5787)
  • React.cloneElement() doesn’t append slash to an existing key when used inside React.Children.map(). (@ianobermiller in #5892)
  • React DOM now supports the cite and profile HTML attributes. (@AprilArcus in #6094 and @saiichihashimoto in #6032)
  • React DOM now supports cssFloat, gridRow and gridColumn CSS properties. (@stevenvachon in #6133 and @mnordick in #4779)
  • React DOM now correctly handles borderImageOutset, borderImageWidth, borderImageSlice, floodOpacity, strokeDasharray, and strokeMiterlimit as unitless CSS properties. (@rofrischmann in #6210 and #6270)
  • React DOM now supports the onAnimationStart, onAnimationEnd, onAnimationIteration, onTransitionEnd, and onInvalid events. Support for onLoad has been added to object elements. (@tomduncalf in #5187, @milesj in #6005, and @ara4n in #5781)
  • React DOM now defaults to using DOM attributes instead of properties, which fixes a few edge case bugs. Additionally the nullification of values (ex: href={null}) now results in the forceful removal, no longer trying to set to the default value used by browsers in the absence of a value. (@syranide in #1510)
  • React DOM does not mistakingly coerce children to strings for Web Components. (@jimfb in #5093)
  • React DOM now correctly normalizes SVG <use> events. (@edmellum in #5720)
  • React DOM does not throw if a <select> is unmounted while its onChange handler is executing. (@sambev in #6028)
  • React DOM does not throw in Windows 8 apps. (@Andrew8xx8 in #6063)
  • React DOM does not throw when asynchronously unmounting a child with a ref. (@yiminghe in #6095)
  • React DOM no longer forces synchronous layout because of scroll position tracking. (@syranide in #2271)
  • Object.is is used in a number of places to compare values, which leads to fewer false positives, especially involving NaN. In particular, this affects the shallowCompare add-on. (@chicoxyzzy in #6132)
  • Add-Ons: ReactPerf no longer instruments adding or removing an event listener because they don’t really touch the DOM due to event delegation. (@antoaravinth in #5209)

### Other improvements

  • React now uses loose-envify instead of envify so it installs less transitive dependencies. (@qerub in #6303)
  • Shallow renderer now exposes getMountedInstance(). (@glenjamin in #4918)
  • Shallow renderer now returns the rendered output from render(). (@simonewebdesign in #5411)
  • React no longer depends on ES5 shams for Object.create and Object.freeze in older environments. It still, however, requires ES5 shims in those environments. (@dgreensp in #4959)
  • React DOM now allows data- attributes with names that start with numbers. (@nLight in #5216)
  • React DOM adds a new suppressContentEditableWarning prop for components like Draft.js that intentionally manage contentEditable children with React. (@mxstbr in #6112)
  • React improves the performance for createClass() on complex specs. (@spicyj in #5550)
Created Published Prerelease Draft