15.4.0 (November 16, 2016)

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)

15.3.2 (September 19, 2016)

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. (@sophiebits 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

• Support error boundaries. (@millermedeiros in #7558, #7569, #7619)
• Skip null ref warning. (@Aweary in #7658)

React Perf Add-on

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

15.3.1 (August 19, 2016)

React

• Improve performance of development builds in various ways. (@gaearon in #7461, #7463, #7483, #7488, #7491, #7510)
• Cleanup internal hooks to improve performance of development builds. (@gaearon in #7464, #7472, #7481, #7496)
• Upgrade fbjs to pick up another performance improvement from @gaearon for development builds. (@zpao in #7532)
• Improve startup time of React in Node. (@zertosh in #7493)
• Improve error message of React.Children.only. (@sophiebits in #7514)

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)