Today, we are releasing React 17!
Learn more about React 17 and how to update to it on the official React blog.
- Add
react/jsx-runtime
andreact/jsx-dev-runtime
for the new JSX transform. (@lunaruan in #18299) - Build component stacks from native error frames. (@sebmarkbage in #18561)
- Allow to specify
displayName
on context for improved stacks. (@eps1lon in #18224) - Prevent
'use strict'
from leaking in the UMD bundles. (@koba04 in #19614) - Stop using
fb.me
for redirects. (@cylim in #19598)
- Delegate events to roots instead of
document
. (@trueadm in #18195 and others) - Clean up all effects before running any next effects. (@bvaughn in #17947)
- Run
useEffect
cleanup functions asynchronously. (@bvaughn in #17925) - Use browser
focusin
andfocusout
foronFocus
andonBlur
. (@trueadm in #19186) - Make all
Capture
events use the browser capture phase. (@trueadm in #19221) - Don't emulate bubbling of the
onScroll
event. (@gaearon in #19464) - Throw if
forwardRef
ormemo
component returnsundefined
. (@gaearon in #19550) - Remove event pooling. (@trueadm in #18969)
- Stop exposing internals that won’t be needed by React Native Web. (@necolas in #18483)
- Attach all known event listeners when the root mounts. (@gaearon in #19659)
- Disable
console
in the second render pass of DEV mode double render. (@sebmarkbage in #18547) - Deprecate the undocumented and misleading
ReactTestUtils.SimulateNative
API. (@gaearon in #13407) - Rename private field names used in the internals. (@gaearon in #18377)
- Don't call User Timing API in development. (@gaearon in #18417)
- Disable console during the repeated render in Strict Mode. (@sebmarkbage in #18547)
- In Strict Mode, double-render components without Hooks too. (@eps1lon in #18430)
- Allow calling
ReactDOM.flushSync
during lifecycle methods (but warn). (@sebmarkbage in #18759) - Add the
code
property to the keyboard event objects. (@bl00mber in #18287) - Add the
disableRemotePlayback
property forvideo
elements. (@tombrowndev in #18619) - Add the
enterKeyHint
property forinput
elements. (@eps1lon in #18634) - Warn when no
value
is provided to<Context.Provider>
. (@charlie1404 in #19054) - Warn when
memo
orforwardRef
components returnundefined
. (@bvaughn in #19550) - Improve the error message for invalid updates. (@JoviDeCroock in #18316)
- Exclude forwardRef and memo from stack frames. (@sebmarkbage in #18559)
- Improve the error message when switching between controlled and uncontrolled inputs. (@vcarl in #17070)
- Keep
onTouchStart
,onTouchMove
, andonWheel
passive. (@gaearon in #19654) - Fix
setState
hanging in development inside a closed iframe. (@gaearon in #19220) - Fix rendering bailout for lazy components with
defaultProps
. (@jddxf in #18539) - Fix a false positive warning when
dangerouslySetInnerHTML
isundefined
. (@eps1lon in #18676) - Fix Test Utils with non-standard
require
implementation. (@just-boris in #18632) - Fix
onBeforeInput
reporting an incorrectevent.type
. (@eps1lon in #19561) - Fix
event.relatedTarget
reported asundefined
in Firefox. (@claytercek in #19607) - Fix "unspecified error" in IE11. (@hemakshis in #19664)
- Fix rendering into a shadow root. (@Jack-Works in #15894)
- Fix
movementX/Y
polyfill with capture events. (@gaearon in #19672) - Use delegation for
onSubmit
andonReset
events. (@gaearon in #19333) - Improve memory usage. (@trueadm in #18970)
- Make
useCallback
behavior consistent withuseMemo
for the server renderer. (@alexmckenley in #18783) - Fix state leaking when a function component throws. (@pmaccart in #19212)
- Improve
findByType
error message. (@henryqdineen in #17439)
- Revamp the priority batching heuristics. (@acdlite in #18796)
- Add the
unstable_
prefix before the experimental APIs. (@acdlite in #18825) - Remove
unstable_discreteUpdates
andunstable_flushDiscreteUpdates
. (@trueadm in #18825) - Remove the
timeoutMs
argument. (@acdlite in #19703) - Disable
<div hidden />
prerendering in favor of a different future API. (@acdlite in #18917) - Add
unstable_expectedLoadTime
to Suspense for CPU-bound trees. (@acdlite in #19936) - Add an experimental
unstable_useOpaqueIdentifier
Hook. (@lunaruan in #17322) - Add an experimental
unstable_startTransition
API. (@rickhanlonii in #19696) - Using
act
in the test renderer no longer flushes Suspense fallbacks. (@acdlite in #18596) - Use global render timeout for CPU Suspense. (@sebmarkbage in #19643)
- Clear the existing root content before mounting. (@bvaughn in #18730)
- Fix a bug with error boundaries. (@acdlite in #18265)
- Fix a bug causing dropped updates in a suspended tree. (@acdlite in #18384 and #18457)
- Fix a bug causing dropped render phase updates. (@acdlite in #18537)
- Fix a bug in SuspenseList. (@sebmarkbage in #18412)
- Fix a bug causing Suspense fallback to show too early. (@acdlite in #18411)
- Fix a bug with class components inside SuspenseList. (@sebmarkbage in #18448)
- Fix a bug with inputs that may cause updates to be dropped. (@jddxf in #18515 and @acdlite in #18535)
- Fix a bug causing Suspense fallback to get stuck. (@acdlite in #18663)
- Don't cut off the tail of a SuspenseList if hydrating. (@sebmarkbage in #18854)
- Fix a bug in
useMutableSource
that may happen whengetSnapshot
changes. (@bvaughn in #18297) - Fix a tearing bug in
useMutableSource
. (@bvaughn in #18912) - Warn if calling setState outside of render but before commit. (@sebmarkbage in #18838)
- Add support for the new JSX transform. (@lunaruan in #18299)
- Fix bug in legacy mode Suspense where effect clean-up functions are not fired. This only affects users who use Suspense for data fetching in legacy mode, which is not technically supported. (@acdlite in #18238)
- Revert warning for cross-component updates that happen inside class render lifecycles (
componentWillReceiveProps
,shouldComponentUpdate
, and so on). (@gaearon in #18330)
- Warn when a string ref is used in a manner that's not amenable to a future codemod (@lunaruan in #17864)
- Deprecate
React.createFactory()
(@trueadm in #17878)
- Warn when changes in
style
may cause an unexpected collision (@sophiebits in #14181, #18002) - Warn when a function component is updated during another component's render phase (@acdlite in #17099)
- Deprecate
unstable_createPortal
(@trueadm in #17880) - Fix
onMouseEnter
being fired on disabled buttons (@AlfredoGJ in #17675) - Call
shouldComponentUpdate
twice when developing inStrictMode
(@bvaughn in #17942) - Add
version
property to ReactDOM (@ealush in #15780) - Don't call
toString()
ofdangerouslySetInnerHTML
(@sebmarkbage in #17773) - Show component stacks in more warnings (@gaearon in #17922, #17586)
- Warn for problematic usages of
ReactDOM.createRoot()
(@trueadm in #17937) - Remove
ReactDOM.createRoot()
callback params and added warnings on usage (@bvaughn in #17916) - Don't group Idle/Offscreen work with other work (@sebmarkbage in #17456)
- Adjust
SuspenseList
CPU bound heuristic (@sebmarkbage in #17455) - Add missing event plugin priorities (@trueadm in #17914)
- Fix
isPending
only being true when transitioning from inside an input event (@acdlite in #17382) - Fix
React.memo
components dropping updates when interrupted by a higher priority update (@acdlite in #18091) - Don't warn when suspending at the wrong priority (@gaearon in #17971)
- Fix a bug with rebasing updates (@acdlite and @sebmarkbage in #17560, #17510, #17483, #17480)
- Fix
mouseenter
handlers from firing twice inside nested React containers. @yuanoook in #16928 - Remove
unstable_createRoot
andunstable_createSyncRoot
experimental APIs. (These are available in the Experimental channel ascreateRoot
andcreateSyncRoot
.) (@acdlite in #17088)
- Fix regression in react-native-web by restoring order of arguments in event plugin extractors (@necolas in #16978)
- Fix regression in Next.js apps by allowing Suspense mismatch during hydration to silently proceed (@sebmarkbage in #16943)
- Fix edge case where a hook update wasn't being memoized. (@sebmarkbage in #16359)
- Fix heuristic for determining when to hydrate, so we don't incorrectly hydrate during an update. (@sebmarkbage in #16739)
- Clear additional fiber fields during unmount to save memory. (@trueadm in #16807)
- Fix bug with required text fields in Firefox. (@halvves in #16578)
- Prefer
Object.is
instead of inline polyfill, when available. (@ku8ar in #16212) - Fix bug when mixing Suspense and error handling. (@acdlite in #16801)
- Improve queue performance by switching its internal data structure to a min binary heap. (@acdlite in #16245)
- Use
postMessage
loop with short intervals instead of attempting to align to frame boundaries withrequestAnimationFrame
. (@acdlite in #16214)
- Avoid tearing issue when a mutation happens and the previous update is still in progress. (@bvaughn in #16623)
- Add
<React.Profiler>
API for gathering performance measurements programmatically. (@bvaughn in #15172) - Remove
unstable_ConcurrentMode
in favor ofunstable_createRoot
. (@acdlite in #15532)
- Deprecate old names for the
UNSAFE_*
lifecycle methods. (@bvaughn in #15186 and @threepointone in #16103) - Deprecate
javascript:
URLs as a common attack surface. (@sebmarkbage in #15047) - Deprecate uncommon "module pattern" (factory) components. (@sebmarkbage in #15145)
- Add support for the
disablePictureInPicture
attribute on<video>
. (@eek in #15334) - Add support for
onLoad
event for<embed>
. (@cherniavskii in #15614) - Add support for editing
useState
state from DevTools. (@bvaughn in #14906) - Add support for toggling Suspense from DevTools. (@gaearon in #15232)
- Warn when
setState
is called fromuseEffect
, creating a loop. (@gaearon in #15180) - Fix a memory leak. (@paulshen in #16115)
- Fix a crash inside
findDOMNode
for components wrapped in<Suspense>
. (@acdlite in #15312) - Fix pending effects from being flushed too late. (@acdlite in #15650)
- Fix incorrect argument order in a warning message. (@brickspert in #15345)
- Fix hiding Suspense fallback nodes when there is an
!important
style. (@acdlite in #15861 and #15882) - Slightly improve hydration performance. (@bmeurer in #15998)
- Add
act(async () => ...)
for testing asynchronous state updates. (@threepointone in #14853) - Add support for nesting
act
from different renderers. (@threepointone in #16039 and #16042) - Warn in Strict Mode if effects are scheduled outside an
act()
call. (@threepointone in #15763 and #16041) - Warn when using
act
from the wrong renderer. (@threepointone in #15756)
- Fix an incorrect bailout in
useReducer()
. (@acdlite in #15124) - Fix iframe warnings in Safari DevTools. (@renanvalentin in #15099)
- Warn if
contextType
is set toContext.Consumer
instead ofContext
. (@aweary in #14831) - Warn if
contextType
is set to invalid values. (@gaearon in #15142)
- Don't set the first option as selected in select tag with
size
attribute. (@kulek1 in #14242) - Improve the
useEffect(async () => ...)
warning message. (@gaearon in #15118) - Improve the error message sometimes caused by duplicate React. (@jaredpalmer in #15139)
- Fix
setState
in shallow renderer to work with Hooks. (@gaearon in #15120) - Fix shallow renderer to support
React.memo
. (@aweary in #14816) - Fix shallow renderer to support Hooks inside
forwardRef
. (@eps1lon in #15100)
- Fix a bug where DevTools caused a runtime error when inspecting a component that used a
useContext
hook. (@bvaughn in #14940)
- Fix a bug that caused inputs to behave incorrectly in UMD builds. (@gaearon in #14914)
- Fix a bug that caused render phase updates to be discarded. (@gaearon in #14852)
- Unwind the context stack when a stream is destroyed without completing, to prevent incorrect values during a subsequent render. (@overlookmotel in #14706)
- Fix
ReactDOM.render
being ignored insideuseEffect
. (@gaearon in #14799) - Fix a crash when unmounting empty portals. (@gaearon in #14820)
- Fix
useImperativeHandle
to work correctly when no deps are specified. (@gaearon in #14801) - Fix
crossOrigin
attribute to work in SVGimage
elements. (@aweary in #14832) - Fix a false positive warning when using Suspense with Hooks. (@gaearon in #14821)
- Include component stack into the
act()
warning. (@threepointone in #14855)
- Fix a crash in Node environment. (@threepointone in #14768)
- Add Hooks — a way to use state and other React features without writing a class. (@acdlite et al. in #13968)
- Improve the
useReducer
Hook lazy initialization API. (@acdlite in #14723)
- Bail out of rendering on identical values for
useState
anduseReducer
Hooks. (@acdlite in #14569) - Use
Object.is
algorithm for comparinguseState
anduseReducer
values. (@Jessidhia in #14752) - Don’t compare the first argument passed to
useEffect
/useMemo
/useCallback
Hooks. (@acdlite in #14594) - Support synchronous thenables passed to
React.lazy()
. (@gaearon in #14626) - Render components with Hooks twice in Strict Mode (DEV-only) to match class behavior. (@gaearon in #14654)
- Warn about mismatching Hook order in development. (@threepointone in #14585 and @acdlite in #14591)
- Effect clean-up functions must return either
undefined
or a function. All other values, includingnull
, are not allowed. @acdlite in #14119
- Support Hooks in the shallow renderer. (@trueadm in #14567)
- Fix wrong state in
shouldComponentUpdate
in the presence ofgetDerivedStateFromProps
for Shallow Renderer. (@chenesan in #14613) - Add
ReactTestRenderer.act()
andReactTestUtils.act()
for batching updates so that tests more closely match real behavior. (@threepointone in #14744)
- Initial release. (@calebmer in #13968)
- Fix reporting after encountering a loop. (@calebmer and @Yurickh in #14661)
- Don't consider throwing to be a rule violation. (@sophiebits in #14040)
- Fix performance of
React.lazy
for large numbers of lazily-loaded components. (@acdlite in #14429) - Clear fields on unmount to avoid memory leaks. (@trueadm in #14276)
- Fix bug with SSR and context when mixing
react-dom/[email protected]
andreact@<16.6
. (@gaearon in #14291) - Fix a performance regression in profiling mode. (@bvaughn in #14383)
- Post to MessageChannel instead of window. (@acdlite in #14234)
- Reduce serialization overhead. (@developit in #14249)
- Fix fallback to
setTimeout
in testing environments. (@bvaughn in #14358) - Add methods for debugging. (@mrkev in #14053)
- Fix bugs in
Suspense
andlazy
. (@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)
- 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)
This release was published in a broken state and should be skipped.
- 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 a crash when Suspense finishes loading in IE11. (@sophiebits in #14126)
- 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)
- Add
React.memo()
as an alternative toPureComponent
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 aboutfindDOMNode
. (@sebmarkbage in #13841)- Rename
unstable_AsyncMode
tounstable_ConcurrentMode
. (@trueadm in #13732) - Rename
unstable_Placeholder
toSuspense
, anddelayMs
tomaxDuration
. (@gaearon in #13799 and @sebmarkbage in #13922)
- 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)
- Add support for
React.memo()
. (@alexmckenley in #13855) - Add support for
contextType
. (@alexmckenley and @sebmarkbage in #13889)
- 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)
- 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)
- 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)
- Improve the warning when
React.forwardRef
receives an unexpected number of arguments. (@andresroberto in #13636)
- 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
withschedule/tracking
. (@bvaughn in #13605) - If a
ForwardRef
component defines adisplayName
, use it in warnings. (@probablyup in #13615)
- 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)
- 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
andmovementY
fields to mouse events (@jasonwilliams in #9018) - Add
tangentialPressure
andtwist
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 theinput
(@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
andreset
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 toprops
(@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 ofunstable_scheduleWork
fromschedule
(@gaearon in #13488) - Fix unstable asynchronous mode from doing unnecessary work when an update takes too long (@acdlite in #13503)
- Fix crash with nullish children when using
dangerouslySetInnerHtml
in a selected<option>
(@mridgway in #13078) - Fix crash when
setTimeout
is missing (@dustinsoftware in #13088)
- Fix
this
in a functional component for shallow renderer to beundefined
(@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)
- Add support for DevTools (@yunchancho in #13173)
- 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)
-
Fix a potential XSS vulnerability when the attacker controls an attribute name (
CVE-2018-6341
). This fix is available in the latest[email protected]
, as well as in previous affected minor versions:[email protected]
,[email protected]
,[email protected]
, and[email protected]
. (@gaearon in #13302) -
Fix a crash in the server renderer when an attribute is called
hasOwnProperty
. This fix is only available in[email protected]
. (@gaearon in #13303)
- Fix a crash when the input
type
changes from some other types totext
. (@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 theonChange
event in IE9. (@nhunzaker in #12976) - Fix a false positive error when returning an empty
<React.Fragment />
from a component. (@philipp-spiess in #12966)
- Fix an incorrect value being provided by new context API. (@ericsoderberghp in #12985, @gaearon in #13019)
- 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)
- Add a new experimental
React.unstable_Profiler
component for measuring performance. (@bvaughn in #12745)
- 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 deepersetState()
. (@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 haspropTypes
ordefaultProps
. (@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)
- 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 returnnull
orundefined
. (@koba04 in #12756)
- 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)
- The new host config shape is flat and doesn't use nested objects. (@gaearon in #12792)
- Fix a potential XSS vulnerability when the attacker controls an attribute name (
CVE-2018-6341
). This fix is available in the latest[email protected]
, as well as in previous affected minor versions:[email protected]
,[email protected]
,[email protected]
, and[email protected]
. (@gaearon in #13302)
- Improve the error message when passing
null
orundefined
toReact.cloneElement
. (@nicolevy in #12534)
- 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)
- 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)
- 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)
- 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)
- 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
withReact.unstable_AsyncMode
. (@acdlite in #12117) - Improve the error message when calling
setState()
on an unmounted component. (@sophiebits in #12347)
- Add a new
getDerivedStateFromProps()
lifecycle andUNSAFE_
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
andonError
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
anddefaultValue
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 anull
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 ofReactDOM.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)
- 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)
- 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)
- 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)
- First release of the new package to help library developers target multiple versions of React. (@bvaughn in #12105)
- First release of the new package to subscribe to external data sources safely for async rendering. (@bvaughn in #12325)
- 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)
- Fix a potential XSS vulnerability when the attacker controls an attribute name (
CVE-2018-6341
). This fix is available in the latest[email protected]
, as well as in previous affected minor versions:[email protected]
,[email protected]
,[email protected]
, and[email protected]
. (@gaearon in #13302)
- Add
Fragment
as named export to React. (@clemmy in #10783) - Support experimental Call/Return types in
React.Children
utilities. (@MatteoVH in #11422)
- Fix radio buttons not getting checked when using multiple lists of radios. (@landvibe in #11227)
- Fix radio buttons not receiving the
onChange
event in some cases. (@jquense in #11028)
- Fix
setState()
callback firing too early when called fromcomponentWillMount
. (@accordeiro in #11507)
- Many tests were rewritten against the public API. Big thanks to everyone who contributed!
- Fix a potential XSS vulnerability when the attacker controls an attribute name (
CVE-2018-6341
). This fix is available in the latest[email protected]
, as well as in previous affected minor versions:[email protected]
,[email protected]
,[email protected]
, and[email protected]
. (@gaearon in #13302)
- Support string values for the
capture
attribute. (@maxschmeling in #11424)
- Don't freeze the
ReactDOMServer
public API. (@travi in #11531) - Don't emit
autoFocus={false}
attribute on the server. (@gaearon in #11543)
- Change the hydration API for better Flow typing. (@sebmarkbage in #11493)
Starting with 16.1.0, we will no longer be publishing new releases on Bower. You can continue using Bower for old releases, or point your Bower configs to the React UMD builds hosted on unpkg that mirror npm releases and will continue to be updated.
- Add support for portals in
React.Children
utilities. (@MatteoVH in #11378) - Warn when a class has a
render
method but doesn't extend a known base class. (@sw-yx in #11168) - Improve the warning when accidentally returning an object from constructor. (@deanbrophy in #11395)
- Allow
on
as a custom attribute for AMP. (@nuc in #11153) - Fix
onMouseEnter
andonMouseLeave
firing on wrong elements. (@gaearon in #11164) - Fix
null
showing up in a warning instead of the component stack. (@gaearon in #10915) - Fix IE11 crash in development mode. (@leidegre in #10921)
- Fix
tabIndex
not getting applied to SVG elements. (@gaearon in #11034) - Fix SVG children not getting cleaned up on
dangerouslySetInnerHTML
in IE. (@OriR in #11108) - Fix false positive text mismatch warning caused by newline normalization. (@gaearon in #11119)
- Fix
form.reset()
to respectdefaultValue
on uncontrolled<select>
. (@aweary in #11057) - Fix
<textarea>
placeholder not rendering on IE11. (@gaearon in #11177) - Fix a crash rendering into shadow root. (@gaearon in #11037)
- Fix false positive warning about hydrating mixed case SVG tags. (@gaearon in #11174)
- Suppress the new unknown tag warning for
<dialog>
element. (@gaearon in #11035) - Warn when defining a non-existent
componentDidReceiveProps
method. (@iamtommcc in #11479) - Warn about function child no more than once. (@andreysaleba in #11120)
- Warn about nested updates no more than once. (@anushreesubramani in #11113)
- Deduplicate other warnings about updates. (@anushreesubramani in #11216)
- Include component stack into the warning about
contentEditable
andchildren
. (@Ethan-Arrowood in #11208) - Improve the warning about booleans passed to event handlers. (@NicBonetto in #11308)
- Improve the warning when a multiple
select
gets nullvalue
. (@Hendeca in #11141) - Move link in the warning message to avoid redirect. (@marciovicente in #11400)
- Add a way to suppress the React DevTools installation prompt. (@gaearon in #11448)
- Remove unused code. (@gaearon in #10802, #10803)
- Add a new
suppressHydrationWarning
attribute for intentional client/server text mismatches. (@sebmarkbage in #11126) - Fix markup generation when components return strings. (@gaearon in #11109)
- Fix obscure error message when passing an invalid style value. (@iamdustan in #11173)
- Include the
autoFocus
attribute into SSR markup. (@gaearon in #11192) - Include the component stack into more warnings. (@gaearon in #11284)
- Fix multiple
setState()
calls incomponentWillMount()
in shallow renderer. (@Hypnosphi in #11167) - Fix shallow renderer to ignore
shouldComponentUpdate()
afterforceUpdate()
. (@d4rky-pl in #11239 and #11439) - Handle
forceUpdate()
andReact.PureComponent
correctly. (@koba04 in #11440) - Add back support for running in production mode. (@gaearon in #11112)
- Add a missing
package.json
dependency. (@gaearon in #11340)
- Add a missing
package.json
dependency. (@gaearon in #11341) - Expose
react-art/Circle
,react-art/Rectangle
, andreact-art/Wedge
. (@gaearon in #11343)
- First release of the new experimental package for creating custom renderers. (@iamdustan in #10758)
- Add support for React DevTools. (@gaearon in #11463)
- First release of the new experimental package for parent-child communication. (@gaearon in #11364)
- Fix a potential XSS vulnerability when the attacker controls an attribute name (
CVE-2018-6341
). This fix is available in the latest[email protected]
, as well as in previous affected minor versions:[email protected]
,[email protected]
,[email protected]
, and[email protected]
. (@gaearon in #13302)
- React 16 depends on the collection types Map and Set, as well as requestAnimationFrame. If you support older browsers and devices which may not yet provide these natively (e.g. <IE11), you may want to include a polyfill.
- Components can now return arrays and strings from
render
. (Docs coming soon!) - Improved error handling with introduction of "error boundaries". Error boundaries are React components that catch JavaScript errors anywhere in their child component tree, log those errors, and display a fallback UI instead of the component tree that crashed.
- First-class support for declaratively rendering a subtree into another DOM node with
ReactDOM.createPortal()
. (Docs coming soon!) - Streaming mode for server side rendering is enabled with
ReactDOMServer.renderToNodeStream()
andReactDOMServer.renderToStaticNodeStream()
. (@aickin in #10425, #10044, #10039, #10024, #9264, and others.) - React DOM now allows passing non-standard attributes. (@nhunzaker in #10385, 10564, #10495 and others)
- There are several changes to the behavior of scheduling and lifecycle methods:
ReactDOM.render()
andReactDOM.unstable_renderIntoContainer()
now returnnull
if called from inside a lifecycle method.- To work around this, you can either use the new portal API or refs.
- Minor changes to
setState
behavior:- Calling
setState
with null no longer triggers an update. This allows you to decide in an updater function if you want to re-render. - Calling
setState
directly in render always causes an update. This was not previously the case. Regardless, you should not be callingsetState
from render. setState
callback (second argument) now fires immediately aftercomponentDidMount
/componentDidUpdate
instead of after all components have rendered.
- Calling
- When replacing
<A />
with<B />
,B.componentWillMount
now always happens beforeA.componentWillUnmount
. Previously,A.componentWillUnmount
could fire first in some cases. - Previously, changing the
ref
to a component would always detach the ref before that component's render is called. Now, we change theref
later, when applying the changes to the DOM. - It is not safe to re-render into a container that was modified by something other than React. This worked previously in some cases but was never supported. We now emit a warning in this case. Instead you should clean up your component trees using
ReactDOM.unmountComponentAtNode
. See this example. componentDidUpdate
lifecycle no longer receivesprevContext
param. (@bvaughn in #8631)- Non-unique keys may now cause children to be duplicated and/or omitted. Using non-unique keys is not (and has never been) supported, but previously it was a hard error.
- Shallow renderer no longer calls
componentDidUpdate()
because DOM refs are not available. This also makes it consistent withcomponentDidMount()
(which does not get called in previous versions either). - Shallow renderer does not implement
unstable_batchedUpdates()
anymore. ReactDOM.unstable_batchedUpdates
now only takes one extra argument after the callback.
- The names and paths to the single-file browser builds have changed to emphasize the difference between development and production builds. For example:
react/dist/react.js
→react/umd/react.development.js
react/dist/react.min.js
→react/umd/react.production.min.js
react-dom/dist/react-dom.js
→react-dom/umd/react-dom.development.js
react-dom/dist/react-dom.min.js
→react-dom/umd/react-dom.production.min.js
- The server renderer has been completely rewritten, with some improvements:
- Server rendering does not use markup validation anymore, and instead tries its best to attach to existing DOM, warning about inconsistencies. It also doesn't use comments for empty components and data-reactid attributes on each node anymore.
- Hydrating a server rendered container now has an explicit API. Use
ReactDOM.hydrate
instead ofReactDOM.render
if you're reviving server rendered HTML. Keep usingReactDOM.render
if you're just doing client-side rendering.
- When "unknown" props are passed to DOM components, for valid values, React will now render them in the DOM. See this post for more details. (@nhunzaker in #10385, 10564, #10495 and others)
- Errors in the render and lifecycle methods now unmount the component tree by default. To prevent this, add error boundaries to the appropriate places in the UI.
- There is no
react-with-addons.js
build anymore. All compatible addons are published separately on npm, and have single-file browser versions if you need them. - The deprecations introduced in 15.x have been removed from the core package.
React.createClass
is now available as create-react-class,React.PropTypes
as prop-types,React.DOM
as react-dom-factories, react-addons-test-utils as react-dom/test-utils, and shallow renderer as react-test-renderer/shallow. See 15.5.0 and 15.6.0 blog posts for instructions on migrating code and automated codemods.
- Backport support for the new JSX transform to 15.x. (@lunaruan in #18299 and @gaearon in #20024)
- Switch from BSD + Patents to MIT license
- 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 withdefaultChecked
on radio inputs. (@jquense in #10156) - Add support for
controlList
attribute to allowed DOM properties (@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)
- Fix a crash on iOS Safari. (@jquense in #9960)
- Don't add
px
to custom CSS property values. (@TrySound in #9966)
- Downgrade deprecation warnings to use
console.warn
instead ofconsole.error
. (@flarnie in #9753) - Add a deprecation warning for
React.createClass
. Points users tocreate-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)
- 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)
- Fix AMD support for addons depending on
react
. (@flarnie in #9919) - Fix
isMounted()
to returntrue
incomponentWillUnmount
. (@mridgway in #9638) - Fix
react-addons-update
to not depend on nativeObject.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)
- Critical Bugfix: Update the version of
prop-types
to fix critical bug. (@gaearon in 545c87f) - Fix
react-addons-create-fragment
package to includeloose-envify
transform for Browserify users. (@mridgway in #9642)
Note: this release has a critical issue and was deprecated. Please update to 15.5.4 or higher.
- Fix
react-addons-create-fragment
package to export correct thing. (@gaearon in #9385) - Fix
create-react-class
package to includeloose-envify
transform for Browserify users. (@mridgway in #9642)
Note: this release has a critical issue and was deprecated. Please update to 15.5.4 or higher.
- 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)
Note: this release has a critical issue and was deprecated. Please update to 15.5.4 or higher.
Note: this release has a critical issue and was deprecated. Please update to 15.5.4 or higher.
Added a deprecation warning forReact.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 withReactDOMServer
. (@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)
- Fixed Chrome bug when backspacing in number inputs. (@nhunzaker in #7359)
- Added
react-dom/test-utils
, which exports the React Test Utils. (@bvaughn)
- Fixed bug where
componentWillUnmount
was not called for children. (@gre in #8512) - Added
react-test-renderer/shallow
, which exports the shallow renderer. (@bvaughn)
- 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
andReact.PropTypes
(@acdlite in 12a96b9) react-addons-test-utils
is deprecated. Usereact-dom/test-utils
andreact-test-renderer/shallow
instead. (@bvaughn)
- Fixed build issues with the Brunch bundler. (@gaearon in #8686)
- Improved error messages for invalid element types. (@sophiebits in #8612)
- Removed a warning about
getInitialState
whenthis.state
is set. (@bvaughn in #8594) - Removed some dead code. (@diegomura in #8050, @dfrownfelter in #8597)
- 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)
- Fixed build issues in RequireJS and SystemJS environments. (@gaearon in #8686)
- Added missing package dependencies. (@kweiberth in #8467)
- Fixed event handling on disabled button elements (@sophiebits in #8387)
- Fixed compatibility of browser build with AMD environments (@zpao in #8374)
- 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)
- 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 thanautoFocus
. (@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)
- When ReactPerf is started, you can now view the relative time spent in components as a chart in Chrome Timeline. (@gaearon in #7549)
- If you call
Simulate.click()
on a<input disabled onClick={foo} />
thenfoo
will get called whereas it didn't before. (@nhunzaker in #7642)
- 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)
- 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)
- Support error boundaries. (@millermedeiros in #7558, #7569, #7619)
- Skip null ref warning. (@Aweary in #7658)
- 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)
- Avoid
<input>
validation warning from browsers when changingtype
. (@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 changingmin
ormax
. (@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)
- Change
trackedTouchCount
invariant into a console.error for better reliability. (@yungsters in #7400)
- Add
React.PureComponent
- a new base class to extend, replacingreact-addons-pure-render-mixin
now that mixins don't work with ES2015 classes. (@sophiebits 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. (@sophiebits in #7133)
- Validate arguments to
oneOf
andoneOfType
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)
- 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)
- Initial public release of package allowing more focused testing. Install with
npm install react-test-renderer
. (@sophiebits in #6944, #7258, @iamdustan in #7362)
- Fix issue resulting in excessive warnings when encountering an internal measurement error. (@sassanh in #7299)
- Implement
type
property on for events created viaTestUtils.Simulate.*
. (@yaycmyk in #6154) - Fix crash when running TestUtils with the production build of React. (@gaearon in #7246)
- 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)
- 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)
- Fix issue resulting in spurious unknown property warnings. (@batusai513 in #7165)
- Improve error handling in cross-platform touch event handling. (@yungsters in #7143)
- 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. (@troydemonbreun in #6398, @sophiebits 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 #6824)
- 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)
- Warn if you attempt to define
childContextTypes
on a functional component (@Aweary in #6933)
- 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
anddefaultValue
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)
- Add
isRunning()
API. (@nfcampos in #6763) - Improve accuracy of lifecycle hook timing. (@gaearon in #6858)
- Fix internal errors when using ReactPerf with portal components. (@gaearon in #6860)
- Fix performance regression. (@sophiebits in #6770)
- Add warning that ReactPerf is not enabled in production. (@sashashakun in #6884)
- Fix timing issue with
null
node. (@keyanzhang in #6958)
- Dependencies on React Native modules use CommonJS requires instead of providesModule. (@davidaurelio in #6715)
- Ensure we're using the latest
object-assign
, which has protection against a non-spec-compliant nativeObject.assign
. (@zpao in #6681) - Add a new warning to communicate that
props
objects passed tocreateElement
must be plain objects. (@richardscarrott in #6134) - Fix a batching bug resulting in some lifecycle methods incorrectly being called multiple times. (@sophiebits in #6650)
- 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)
- Completely rewritten to collect data more accurately and to be easier to maintain. (@gaearon in #6647, #6046)
- Remove some special cases for platform specific branching. (@sebmarkbage in #6660)
- Remove use of
merge
utility. (@sebmarkbage in #6634) - Renamed some modules to better indicate usage (@javache in #6643)
- Removed extraneous files from npm package. (@gaearon in #6388)
- Ensure
componentWillUnmount
is only called once. (@jimfb in #6613)
- 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)
- Ensure that functional components do not have an owner. (@gaearon in #6362)
- Handle invalid arguments to
scryRenderedDOMComponentsWithClass
better. (@ipeters90 in #6529)
- These files are now shipped inside the React npm package. They have no impact on React core or ReactDOM.
- 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)
- Fixed issue resulting in loss of cursor position in controlled inputs. (@sophiebits in #6449)
- Initial render now uses
document.createElement
instead of generating HTML. Previously we would generate a large string of HTML and then setnode.innerHTML
. At the time, this was decided to be faster than usingdocument.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 usingcreateElement
we can make other parts of React faster. (@sophiebits in #5205) data-reactid
is no longer on every node. As a result of usingdocument.createElement
, we can prime the node cache as we create DOM nodes, allowing us to skip a potential lookup (which used thedata-reactid
attribute). Root nodes will have adata-reactroot
attribute and server generated markup will still containdata-reactid
. (@sophiebits 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. Previouslynull
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. (@sophiebits 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 extendingReact.Component
or usingReact.createClass()
, so we couldn’t reliably tell if your component is a function or a class, and did not allow returningnull
from it. This issue is solved in React 15, and you can now returnnull
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 andReact.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)
- No more extra
<span>
s. React.cloneElement()
now resolvesdefaultProps
. We fixed a bug inReact.cloneElement()
that some components may rely on. If some of theprops
received bycloneElement()
areundefined
, it used to return an element withundefined
values for those props. We’re changing it to be consistent withcreateElement()
. Now anyundefined
props passed tocloneElement()
are resolved to the corresponding component’sdefaultProps
. (@truongduy134 in #5997)ReactPerf.getLastMeasurements()
is opaque. This change won’t affect applications but may break some third-party tools. We are revampingReactPerf
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 ofReactPerf.getLastMeasurements()
an opaque data structure that should not be relied upon. (@gaearon in #6286)
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
, andunmountComponentAtNode
. As a reminder, they are now available onReactDOM
andReactDOMServer
. (@jimfb in #5832) - Deprecated addons are removed:
batchedUpdates
andcloneWithProps
. (@jimfb in #5859, @zpao in #6016) - Deprecated component instance methods are removed:
setProps
,replaceProps
, andgetDOMNode
. (@jimfb in #5570) - Deprecated CommonJS
react/addons
entry point is removed. As a reminder, you should use separatereact-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)
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
andvalueLink
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 ignoringvalue={null}
. React 15 warns you on anull
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 passundefined
to make the input uncontrolled. (@antoaravinth in #5048) ReactPerf.printDOM()
was renamed toReactPerf.printOperations()
, andReactPerf.getMeasurementsSummaryMap()
was renamed toReactPerf.getWasted()
. (@gaearon in #6287)
- If you use a minified copy of the development build, React DOM kindly encourages you to use the faster production build instead. (@sophiebits 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: writingstyle={{width: '300'}}
. Unitless number values likewidth: 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
andkey
from the props. (@prometheansacrifice in #5744) - React will now warn if you pass a different
props
object tosuper()
in the constructor. (@prometheansacrifice in #5346) - React will now warn if you call
setState()
insidegetChildContext()
. (@raineroviir in #6121) - React DOM now attempts to warn for mistyped event handlers on DOM elements, such as
onclick
which should beonClick
. (@ali in #5361) - React DOM now warns about
NaN
values instyle
. (@jontewks in #5811) - React DOM now warns if you specify both
value
anddefaultValue
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
oronFocusOut
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()
, orthis.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()
andobjectOf()
provide better error messages for invalid arguments. (@chicoxyzzy in #5390)
- Fixed multiple small memory leaks. (@sophiebits 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 whencontext
changes. (@milesj in #5787) React.cloneElement()
doesn’t append slash to an existingkey
when used insideReact.Children.map()
. (@ianobermiller in #5892)- React DOM now supports the
cite
andprofile
HTML attributes. (@AprilArcus in #6094 and @saiichihashimoto in #6032) - React DOM now supports
cssFloat
,gridRow
andgridColumn
CSS properties. (@stevenvachon in #6133 and @mnordick in #4779) - React DOM now correctly handles
borderImageOutset
,borderImageWidth
,borderImageSlice
,floodOpacity
,strokeDasharray
, andstrokeMiterlimit
as unitless CSS properties. (@rofrischmann in #6210 and #6270) - React DOM now supports the
onAnimationStart
,onAnimationEnd
,onAnimationIteration
,onTransitionEnd
, andonInvalid
events. Support foronLoad
has been added toobject
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 mistakenly 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 itsonChange
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 involvingNaN
. In particular, this affects theshallowCompare
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)
- React now uses
loose-envify
instead ofenvify
so it installs fewer 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
andObject.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 managecontentEditable
children with React. (@mxstbr in #6112) - React improves the performance for
createClass()
on complex specs. (@sophiebits in #5550)
- Backport support for the new JSX transform to 0.14.x. (@lunaruan in #18299 and @gaearon in #20024)
- Fixed memory leak when rendering on the server
- Fixed bug with
<option>
tags when usingdangerouslySetInnerHTML
- Fixed memory leak in synthetic event system
- Fixed bug with calling
setState
incomponentWillMount
when using shallow rendering
- Updated
fbjs
dependency to pick up change affecting handling of undefined document.
- More minor internal changes for better compatibility with React Native
- Minor internal changes for better compatibility with React Native
- The
autoCapitalize
andautoCorrect
props are now set as attributes in the DOM instead of properties to improve cross-browser compatibility - Fixed bug with controlled
<select>
elements not handling updates properly
- Some DOM operation names have been updated for clarity in the output of
.printDOM()
- Added support for
nonce
attribute for<script>
and<style>
elements - Added support for
reversed
attribute for<ol>
elements
- Fixed bug with shallow rendering and function refs
- Fixed bug resulting in timeouts firing incorrectly when mounting and unmounting rapidly
- Added
react-dom-server.js
to exposerenderToString
andrenderToStaticMarkup
for usage in the browser
- Fixed bug with development build preventing events from firing in some versions of Internet Explorer & Edge
- Fixed bug with development build when using es5-sham in older versions of Internet Explorer
- Added support for
integrity
attribute - Fixed bug resulting in
children
prop being coerced to a string for custom elements, which was not the desired behavior - Moved
react
fromdependencies
topeerDependencies
to match expectations and align withreact-addons-*
packages
- Fixed bug where events wouldn't fire in old browsers when using React in development mode
- Fixed bug preventing use of
dangerouslySetInnerHTML
with Closure Compiler Advanced mode - Added support for
srcLang
,default
, andkind
attributes for<track>
elements - Added support for
color
attribute - Ensured legacy
.props
access on DOM nodes is updated on re-renders
- Fixed
scryRenderedDOMComponentsWithClass
so it works with SVG
- Fix bug preventing
0
to be used as a timeout value
- Added
react-dom.js
tomain
to improve compatibility with tooling
- Split the main
react
package into two:react
andreact-dom
. This paves the way to writing components that can be shared between the web version of React and React Native. This means you will need to include both files and some functions have been moved fromReact
toReactDOM
. - Addons have been moved to separate packages (
react-addons-clone-with-props
,react-addons-create-fragment
,react-addons-css-transition-group
,react-addons-linked-state-mixin
,react-addons-perf
,react-addons-pure-render-mixin
,react-addons-shallow-compare
,react-addons-test-utils
,react-addons-transition-group
,react-addons-update
,ReactDOM.unstable_batchedUpdates
). - Stateless functional components - React components were previously created using React.createClass or using ES6 classes. This release adds a new syntax where a user defines a single stateless render function (with one parameter:
props
) which returns a JSX element, and this function may be used as a component. - Refs to DOM components as the DOM node itself. Previously the only useful thing you can do with a DOM component is call
getDOMNode()
to get the underlying DOM node. Starting with this release, a ref to a DOM component is the actual DOM node. Note that refs to custom (user-defined) components work exactly as before; only the built-in DOM components are affected by this change.
React.initializeTouchEvents
is no longer necessary and has been removed completely. Touch events now work automatically.- Add-Ons: Due to the DOM node refs change mentioned above,
TestUtils.findAllInRenderedTree
and related helpers are no longer able to take a DOM component, only a custom component. - The
props
object is now frozen, so mutating props after creating a component element is no longer supported. In most cases,React.cloneElement
should be used instead. This change makes your components easier to reason about and enables the compiler optimizations mentioned above. - Plain objects are no longer supported as React children; arrays should be used instead. You can use the
createFragment
helper to migrate, which now returns an array. - Add-Ons:
classSet
has been removed. Use classnames instead. - Web components (custom elements) now use native property names. Eg:
class
instead ofclassName
.
this.getDOMNode()
is now deprecated andReactDOM.findDOMNode(this)
can be used instead. Note that in the common case,findDOMNode
is now unnecessary since a ref to the DOM component is now the actual DOM node.setProps
andreplaceProps
are now deprecated. Instead, call ReactDOM.render again at the top level with the new props.- ES6 component classes must now extend
React.Component
in order to enable stateless function components. The ES3 module pattern will continue to work. - Reusing and mutating a
style
object between renders has been deprecated. This mirrors our change to freeze theprops
object. - Add-Ons:
cloneWithProps
is now deprecated. UseReact.cloneElement
instead (unlikecloneWithProps
,cloneElement
does not mergeclassName
orstyle
automatically; you can merge them manually if needed). - Add-Ons: To improve reliability,
CSSTransitionGroup
will no longer listen to transition events. Instead, you should specify transition durations manually using props such astransitionEnterTimeout={500}
.
- Added
React.Children.toArray
which takes a nested children object and returns a flat array with keys assigned to each child. This helper makes it easier to manipulate collections of children in yourrender
methods, especially if you want to reorder or slicethis.props.children
before passing it down. In addition,React.Children.map
now returns plain arrays too. - React uses
console.error
instead ofconsole.warn
for warnings so that browsers show a full stack trace in the console. (Our warnings appear when you use patterns that will break in future releases and for code that is likely to behave unexpectedly, so we do consider our warnings to be “must-fix” errors.) - Previously, including untrusted objects as React children could result in an XSS security vulnerability. This problem should be avoided by properly validating input at the application layer and by never passing untrusted objects around your application code. As an additional layer of protection, React now tags elements with a specific ES2015 (ES6)
Symbol
in browsers that support it, in order to ensure that React never considers untrusted JSON to be a valid element. If this extra security protection is important to you, you should add aSymbol
polyfill for older browsers, such as the one included by Babel’s polyfill. - When possible, React DOM now generates XHTML-compatible markup.
- React DOM now supports these standard HTML attributes:
capture
,challenge
,inputMode
,is
,keyParams
,keyType
,minLength
,summary
,wrap
. It also now supports these non-standard attributes:autoSave
,results
,security
. - React DOM now supports these SVG attributes, which render into namespaced attributes:
xlinkActuate
,xlinkArcrole
,xlinkHref
,xlinkRole
,xlinkShow
,xlinkTitle
,xlinkType
,xmlBase
,xmlLang
,xmlSpace
. - The
image
SVG tag is now supported by React DOM. - In React DOM, arbitrary attributes are supported on custom elements (those with a hyphen in the tag name or an
is="..."
attribute). - React DOM now supports these media events on
audio
andvideo
tags:onAbort
,onCanPlay
,onCanPlayThrough
,onDurationChange
,onEmptied
,onEncrypted
,onEnded
,onError
,onLoadedData
,onLoadedMetadata
,onLoadStart
,onPause
,onPlay
,onPlaying
,onProgress
,onRateChange
,onSeeked
,onSeeking
,onStalled
,onSuspend
,onTimeUpdate
,onVolumeChange
,onWaiting
. - Many small performance improvements have been made.
- Many warnings show more context than before.
- Add-Ons: A
shallowCompare
add-on has been added as a migration path forPureRenderMixin
in ES6 classes. - Add-Ons:
CSSTransitionGroup
can now use custom class names instead of appending-enter-active
or similar to the transition name.
- React DOM now warns you when nesting HTML elements invalidly, which helps you avoid surprising errors during updates.
- Passing
document.body
directly as the container toReactDOM.render
now gives a warning as doing so can cause problems with browser extensions that modify the DOM. - Using multiple instances of React together is not supported, so we now warn when we detect this case to help you avoid running into the resulting problems.
- Click events are handled by React DOM more reliably in mobile browsers, particularly in Mobile Safari.
- SVG elements are created with the correct namespace in more cases.
- React DOM now renders
<option>
elements with multiple text children properly and renders<select>
elements on the server with the correct option selected. - When two separate copies of React add nodes to the same document (including when a browser extension uses React), React DOM tries harder not to throw exceptions during event handling.
- Using non-lowercase HTML tag names in React DOM (e.g.,
React.createElement('DIV')
) no longer causes problems, though we continue to recommend lowercase for consistency with the JSX tag name convention (lowercase names refer to built-in components, capitalized names refer to custom components). - React DOM understands that these CSS properties are unitless and does not append “px” to their values:
animationIterationCount
,boxOrdinalGroup
,flexOrder
,tabSize
,stopOpacity
. - Add-Ons: When using the test utils,
Simulate.mouseEnter
andSimulate.mouseLeave
now work. - Add-Ons: ReactTransitionGroup now correctly handles multiple nodes being removed simultaneously.
- The
react-tools
package andJSXTransformer.js
browser file have been deprecated. You can continue using version0.13.3
of both, but we no longer support them and recommend migrating to Babel, which has built-in support for React and JSX.
- Babel 5.8.24 introduces Inlining React elements: The
optimisation.react.inlineElements
transform converts JSX elements to object literals like{type: 'div', props: ...}
instead of calls toReact.createElement
. This should only be enabled in production, since it disables some development warnings/checks. - Babel 5.8.24 introduces Constant hoisting for React elements: The
optimisation.react.constantElements
transform hoists element creation to the top level for subtrees that are fully static, which reduces calls toReact.createElement
and the resulting allocations. More importantly, it tells React that the subtree hasn’t changed so React can completely skip it when reconciling. This should only be enabled in production, since it disables some development warnings/checks.
- Added
clipPath
element and attribute for SVG - Improved warnings for deprecated methods in plain JS classes
- Loosened
dangerouslySetInnerHTML
restrictions so{__html: undefined}
will no longer throw - Fixed extraneous context warning with non-pure
getChildContext
- Ensure
replaceState(obj)
retains prototype ofobj
- Test Utils: Ensure that shallow rendering works when components define
contextTypes
- Added
strokeDashoffset
,flexPositive
,flexNegative
to the list of unitless CSS properties - Added support for more DOM properties:
scoped
- for<style>
elementshigh
,low
,optimum
- for<meter>
elementsunselectable
- IE-specific property to prevent user selection
- Fixed a case where re-rendering after rendering null didn't properly pass context
- Fixed a case where re-rendering after rendering with
style={null}
didn't properly updatestyle
- Update
uglify
dependency to prevent a bug in IE8 - Improved warnings
- Immutability Helpers: Ensure it supports
hasOwnProperty
as an object key
- Improve documentation for new options
- Don't throw when rendering empty
<select>
elements - Ensure updating
style
works when transitioning fromnull
- TestUtils: Don't warn about
getDOMNode
for ES6 classes - TestUtils: Ensure wrapped full page components (
<html>
,<head>
,<body>
) are treated as DOM components - Perf: Stop double-counting DOM components
- Fix option parsing for
--non-strict-es6module
- Deprecated patterns that warned in 0.12 no longer work: most prominently, calling component classes without using JSX or React.createElement and using non-component functions with JSX or createElement
- Mutating
props
after an element is created is deprecated and will cause warnings in development mode; future versions of React will incorporate performance optimizations assuming that props aren't mutated - Static methods (defined in
statics
) are no longer autobound to the component class ref
resolution order has changed slightly such that a ref to a component is available immediately after itscomponentDidMount
method is called; this change should be observable only if your component calls a parent component's callback within yourcomponentDidMount
, which is an anti-pattern and should be avoided regardless- Calls to
setState
in life-cycle methods are now always batched and therefore asynchronous. Previously the first call on the first mount was synchronous. setState
andforceUpdate
on an unmounted component now warns instead of throwing. That avoids a possible race condition with Promises.- Access to most internal properties has been completely removed, including
this._pendingState
andthis._rootNodeID
.
- Support for using ES6 classes to build React components; see the v0.13.0 beta 1 notes for details.
- Added new top-level API
React.findDOMNode(component)
, which should be used in place ofcomponent.getDOMNode()
. The base class for ES6-based components will not havegetDOMNode
. This change will enable some more patterns moving forward. - Added a new top-level API
React.cloneElement(el, props)
for making copies of React elements – see the v0.13 RC2 notes for more details. - New
ref
style, allowing a callback to be used in place of a name:<Photo ref={(c) => this._photo = c} />
allows you to reference the component withthis._photo
(as opposed toref="photo"
which givesthis.refs.photo
). this.setState()
can now take a function as the first argument for transactional state updates, such asthis.setState((state, props) => ({count: state.count + 1}));
– this means that you no longer need to usethis._pendingState
, which is now gone.- Support for iterators and immutable-js sequences as children.
ComponentClass.type
is deprecated. Just useComponentClass
(usually aselement.type === ComponentClass
).- Some methods that are available on
createClass
-based components are removed or deprecated from ES6 classes (getDOMNode
,replaceState
,isMounted
,setProps
,replaceProps
).
React.addons.createFragment
was added for adding keys to entire sets of children.
React.addons.classSet
is now deprecated. This functionality can be replaced with several freely available modules. classnames is one such module.- Calls to
React.addons.cloneWithProps
can be migrated to useReact.cloneElement
instead – make sure to mergestyle
andclassName
manually if desired.
- When transforming ES6 syntax,
class
methods are no longer enumerable by default, which requiresObject.defineProperty
; if you support browsers such as IE8, you can pass--target es3
to mirror the old behavior
--target
option is available on the jsx command, allowing users to specify and ECMAScript version to target.es5
is the default.es3
restores the previous default behavior. An additional transform is added here to ensure the use of reserved words as properties is safe (egthis.static
will becomethis['static']
for IE8 compatibility).
- The transform for the call spread operator has also been enabled.
- The return value of
transform
now containssourceMap
as a JS object already, not an instance ofSourceMapGenerator
.
- A change was made to how some JSX was parsed, specifically around the use of
>
or}
when inside an element. Previously it would be treated as a string but now it will be treated as a parse error. Thejsx_orphaned_brackets_transformer
package on npm can be used to find and fix potential issues in your JSX code.
- Added support for more HTML attributes:
formAction
,formEncType
,formMethod
,formTarget
,marginHeight
,marginWidth
- Added
strokeOpacity
to the list of unitless CSS properties - Removed trailing commas (allows npm module to be bundled and used in IE8)
- Fixed bug resulting in error when passing
undefined
toReact.createElement
- now there is a useful warning
- JSX-related transforms now always use double quotes for props and
displayName
- Types transform updated with latest support
- jstransform version updated with improved ES6 transforms
- Explicit Esprima dependency removed in favor of using Esprima information exported by jstransform
key
andref
moved off props object, now accessible on the element directly- React is now BSD licensed with accompanying Patents grant
- Default prop resolution has moved to Element creation time instead of mount time, making them effectively static
React.__internals
is removed - it was exposed for DevTools which no longer needs access- Composite Component functions can no longer be called directly - they must be wrapped with
React.createFactory
first. This is handled for you when using JSX.
- Spread operator (
{...}
) introduced to deprecatethis.transferPropsTo
- Added support for more HTML attributes:
acceptCharset
,classID
,manifest
React.renderComponent
-->React.render
React.renderComponentToString
-->React.renderToString
React.renderComponentToStaticMarkup
-->React.renderToStaticMarkup
React.isValidComponent
-->React.isValidElement
React.PropTypes.component
-->React.PropTypes.element
React.PropTypes.renderable
-->React.PropTypes.node
- DEPRECATED
React.isValidClass
- DEPRECATED
instance.transferPropsTo
- DEPRECATED Returning
false
from event handlers to preventDefault - DEPRECATED Convenience Constructor usage as function, instead wrap with
React.createFactory
- DEPRECATED use of
key={null}
to assign implicit keys
- Better handling of events and updates in nested results, fixing value restoration in "layered" controlled components
- Correctly treat
event.getModifierState
as case sensitive - Improved normalization of
event.charCode
- Better error stacks when involving autobound methods
- Removed DevTools message when the DevTools are installed
- Correctly detect required language features across browsers
- Fixed support for some HTML attributes:
list
updates correctly nowscrollLeft
,scrollTop
removed, these should not be specified as props
- Improved error messages
React.addons.batchedUpdates
added to API for hooking into update cycle
React.addons.update
usesassign
instead ofcopyProperties
which doeshasOwnProperty
checks. Properties on prototypes will no longer be updated correctly.
- Fixed some issues with CSS Transitions
- Enforced convention: lower case tag names are always treated as HTML tags, upper case tag names are always treated as composite components
- JSX no longer transforms to simple function calls
@jsx React.DOM
no longer required- spread (
{...}
) operator introduced to allow easier use of props
- JSXTransformer: Make sourcemaps an option when using APIs directly (eg, for react-rails)
- Added support for
<dialog>
element and associatedopen
attribute - Added support for
<picture>
element and associatedmedia
andsizes
attributes - Added
React.createElement
API in preparation for React v0.12React.createDescriptor
has been deprecated as a result
<picture>
is now parsed intoReact.DOM.picture
- Update
esprima
andjstransform
for correctness fixes - The
jsx
executable now exposes a--strip-types
flag which can be used to remove TypeScript-like type annotations- This option is also exposed to
require('react-tools').transform
asstripTypes
- This option is also exposed to
setState
can be called insidecomponentWillMount
in non-DOM environmentsSyntheticMouseEvent.getEventModifierState
correctly renamed togetModifierState
getModifierState
correctly returns aboolean
getModifierState
is now correctly case sensitive- Empty Text node used in IE8
innerHTML
workaround is now removed, fixing rerendering in certain cases
- Fix duplicate variable declaration in JSXTransformer (caused issues in some browsers)
getDefaultProps()
is now called once per class and shared across all instancesMyComponent()
now returns a descriptor, not an instanceReact.isValidComponent
andReact.PropTypes.component
validate descriptors, not component instances- Custom
propType
validators should return anError
instead of logging directly
- Rendering to
null
- Keyboard events include normalized
e.key
ande.getModifierState()
properties - New normalized
onBeforeInput
event React.Children.count
has been added as a helper for counting the number of children
- Re-renders are batched in more cases
- Events:
e.view
properly normalized - Added Support for more HTML attributes (
coords
,crossOrigin
,download
,hrefLang
,mediaGroup
,muted
,scrolling
,shape
,srcSet
,start
,useMap
) - Improved SVG support
- Changing
className
on a mounted SVG component now works correctly - Added support for elements
mask
andtspan
- Added support for attributes
dx
,dy
,fillOpacity
,fontFamily
,fontSize
,markerEnd
,markerMid
,markerStart
,opacity
,patternContentUnits
,patternUnits
,preserveAspectRatio
,strokeDasharray
,strokeOpacity
- Changing
- CSS property names with vendor prefixes (
Webkit
,ms
,Moz
,O
) are now handled properly - Duplicate keys no longer cause a hard error; now a warning is logged (and only one of the children with the same key is shown)
img
event listeners are now unbound properly, preventing the error "Two valid but unequal nodes with the samedata-reactid
"- Added explicit warning when missing polyfills
- PureRenderMixin: a mixin which helps optimize "pure" components
- Perf: a new set of tools to help with performance analysis
- Update: New
$apply
command to transform values - TransitionGroup bug fixes with null elements, Android
- Now includes the pre-built packages under
dist/
. envify
is properly listed as a dependency instead of a peer dependency
- Added support for namespaces, eg
<Components.Checkbox />
- JSXTransformer
- Enable the same
harmony
features available in the command line with<script type="text/jsx;harmony=true">
- Scripts are downloaded in parallel for more speed. They are still executed in order (as you would expect with normal script tags)
- Fixed a bug preventing sourcemaps from working in Firefox
- Enable the same
- Improved readme with usage and API information
- Improved ES6 transforms available with
--harmony
option - Added
--source-map-inline
option to thejsx
executable - New
transformWithDetails
API which gives access to the raw sourcemap data
- Added warnings to help migrate towards descriptors
- Made it possible to server render without React-related markup (
data-reactid
,data-react-checksum
). This DOM will not be mountable by React. Read the docs forReact.renderComponentToStaticMarkup
- Added support for more attributes:
srcSet
for<img>
to specify images at different pixel ratiostextAnchor
for SVG
- Ensure all void elements don’t insert a closing tag into the markup.
- Ensure
className={false}
behaves consistently - Ensure
this.refs
is defined, even if no refs are specified.
update
function to deal with immutable data. Read the docs
- Added an option argument to
transform
function. The only option supported isharmony
, which behaves the same asjsx --harmony
on the command line. This uses the ES6 transforms from jstransform.
- The lifecycle methods
componentDidMount
andcomponentDidUpdate
no longer receive the root node as a parameter; usethis.getDOMNode()
instead - Whenever a prop is equal to
undefined
, the default value returned bygetDefaultProps
will now be used instead React.unmountAndReleaseReactRootNode
was previously deprecated and has now been removedReact.renderComponentToString
is now synchronous and returns the generated HTML string- Full-page rendering (that is, rendering the
<html>
tag using React) is now supported only when starting with server-rendered markup - On mouse wheel events,
deltaY
is no longer negated - When prop types validation fails, a warning is logged instead of an error thrown (with the production build of React, type checks are now skipped for performance)
- On
input
,select
, andtextarea
elements,.getValue()
is no longer supported; use.getDOMNode().value
instead this.context
on components is now reserved for internal use by React
- React now never rethrows errors, so stack traces are more accurate and Chrome's purple break-on-error stop sign now works properly
- Added support for SVG tags
defs
,linearGradient
,polygon
,radialGradient
,stop
- Added support for more attributes:
crossOrigin
for CORS requestsdownload
andhrefLang
for<a>
tagsmediaGroup
andmuted
for<audio>
and<video>
tagsnoValidate
andformNoValidate
for formsproperty
for Open Graph<meta>
tagssandbox
,seamless
, andsrcDoc
for<iframe>
tagsscope
for screen readersspan
for<colgroup>
tags
- Added support for defining
propTypes
in mixins - Added
any
,arrayOf
,component
,oneOfType
,renderable
,shape
toReact.PropTypes
- Added support for
statics
on component spec for static component methods - On all events,
.currentTarget
is now properly set - On keyboard events,
.key
is now polyfilled in all browsers for special (non-printable) keys - On clipboard events,
.clipboardData
is now polyfilled in IE - On drag events,
.dragTransfer
is now present - Added support for
onMouseOver
andonMouseOut
in addition to the existingonMouseEnter
andonMouseLeave
events - Added support for
onLoad
andonError
on<img>
elements - Added support for
onReset
on<form>
elements - The
autoFocus
attribute is now polyfilled consistently oninput
,select
, andtextarea
- React no longer adds an
__owner__
property to each component'sprops
object; passed-in props are now never mutated - When nesting top-level components (e.g., calling
React.renderComponent
withincomponentDidMount
), events now properly bubble to the parent component - Fixed a case where nesting top-level components would throw an error when updating
- Passing an invalid or misspelled propTypes type now throws an error
- On mouse enter/leave events,
.target
,.relatedTarget
, and.type
are now set properly - On composition events,
.data
is now properly normalized in IE9 and IE10 - CSS property values no longer have
px
appended for the unitless propertiescolumnCount
,flex
,flexGrow
,flexShrink
,lineClamp
,order
,widows
- Fixed a memory leak when unmounting children with a
componentWillUnmount
handler - Fixed a memory leak when
renderComponentToString
would store event handlers - Fixed an error that could be thrown when removing form elements during a click handler
- Boolean attributes such as
disabled
are rendered without a value (previouslydisabled="true"
, now simplydisabled
) key
values containing.
are now supported- Shortened
data-reactid
values for performance - Components now always remount when the
key
property changes - Event handlers are attached to
document
only when necessary, improving performance in some cases - Events no longer use
.returnValue
in modern browsers, eliminating a warning in Chrome scrollLeft
andscrollTop
are no longer accessed on document.body, eliminating a warning in Chrome- General performance fixes, memory optimizations, improvements to warnings and error messages
React.addons.TestUtils
was added to help write unit testsReact.addons.TransitionGroup
was renamed toReact.addons.CSSTransitionGroup
React.addons.TransitionGroup
was added as a more general animation wrapperReact.addons.cloneWithProps
was added for cloning components and modifying their props- Bug fix for adding back nodes during an exit transition for CSSTransitionGroup
- Bug fix for changing
transitionLeave
in CSSTransitionGroup - Performance optimizations for CSSTransitionGroup
- On checkbox
<input>
elements,checkedLink
is now supported for two-way binding
- Whitespace normalization has changed; now space between two tags on the same line will be preserved, while newlines between two tags will be removed
- The
react-tools
npm package no longer includes the React core libraries; use thereact
package instead. displayName
is now added in more cases, improving error messages and names in the React Dev Tools- Fixed an issue where an invalid token error was thrown after a JSX closing tag
JSXTransformer
now uses source maps automatically in modern browsersJSXTransformer
error messages now include the filename and problematic line contents when a file fails to parse
- Added support for more attributes:
rows
&cols
for<textarea>
defer
&async
for<script>
loop
for<audio>
&<video>
autoCorrect
for form fields (a non-standard attribute only supported by mobile WebKit)
- Improved error messages
- Fixed Selection events in IE11
- Added
onContextMenu
events
- Fixed bugs with TransitionGroup when children were undefined
- Added support for
onTransition
- Upgraded
jstransform
andesprima-fb
- Added support for use in IE8
- Upgraded browserify, which reduced file size by ~65KB (16KB gzipped)
- Fixed a potential XSS vulnerability when using user content as a
key
: CVE-2013-7035
- Fixed bug with
<input type="range">
and selection events. - Fixed bug with selection and focus.
- Made it possible to unmount components from the document root.
- Fixed bug for
disabled
attribute handling on non-<input>
elements.
- Fixed bug with transition and animation event detection.
- Memory usage improvements - reduced allocations in core which will help with GC pauses
- Performance improvements - in addition to speeding things up, we made some tweaks to stay out of slow path code in V8 and Nitro.
- Standardized prop -> DOM attribute process. This previously resulting in additional type checking and overhead as well as confusing cases for users. Now we will always convert your value to a string before inserting it into the DOM.
- Support for Selection events.
- Support for Composition events.
- Support for additional DOM properties (
charSet
,content
,form
,httpEquiv
,rowSpan
,autoCapitalize
). - Support for additional SVG properties (
rx
,ry
). - Support for using
getInitialState
andgetDefaultProps
in mixins. - Support mounting into iframes.
- Bug fixes for controlled form components.
- Bug fixes for SVG element creation.
- Added
React.version
. - Added
React.isValidClass
- Used to determine if a value is a valid component constructor. - Removed
React.autoBind
- This was deprecated in v0.4 and now properly removed. - Renamed
React.unmountAndReleaseReactRootNode
toReact.unmountComponentAtNode
. - Began laying down work for refined performance analysis.
- Better support for server-side rendering - react-page has helped improve the stability for server-side rendering.
- Made it possible to use React in environments enforcing a strict Content Security Policy. This also makes it possible to use React to build Chrome extensions.
- Introduced a separate build with several "addons" which we think can help improve the React experience. We plan to deprecate this in the long-term, instead shipping each as standalone pieces. Read more in the docs.
- No longer transform
class
toclassName
as part of the transform! This is a breaking change - if you were usingclass
, you must change this toclassName
or your components will be visually broken. - Added warnings to the in-browser transformer to make it clear it is not intended for production use.
- Improved compatibility for Windows
- Improved support for maintaining line numbers when transforming.
setState
callbacks are now executed in the scope of your component.click
events now work on Mobile Safari.- Prevent a potential error in event handling if
Object.prototype
is extended. - Don't set DOM attributes to the string
"undefined"
on update when previously defined. - Improved support for
<iframe>
attributes. - Added checksums to detect and correct cases where server-side rendering markup mismatches what React expects client-side.
- Improved environment detection so it can be run in a non-browser environment.
- Switch from using
id
attribute todata-reactid
to track DOM nodes. This allows you to integrate with other JS and CSS libraries more easily. - Support for more DOM elements and attributes (e.g.,
<canvas>
) - Improved server-side rendering APIs.
React.renderComponentToString(<component>, callback)
allows you to use React on the server and generate markup which can be sent down to the browser. prop
improvements: validation and default values. Read our blog post for details...- Support for the
key
prop, which allows for finer control over reconciliation. Read the docs for details... - Removed
React.autoBind
. Read our blog post for details... - Improvements to forms. We've written wrappers around
<input>
,<textarea>
,<option>
, and<select>
in order to standardize many inconsistencies in browser implementations. This includes support fordefaultValue
, and improved implementation of theonChange
event, and circuit completion. Read the docs for details... - We've implemented an improved synthetic event system that conforms to the W3C spec.
- Updates to your component are batched now, which may result in a significantly faster re-render of components.
this.setState
now takes an optional callback as it's second parameter. If you were usingonClick={this.setState.bind(this, state)}
previously, you'll want to make sure you add a third parameter so that the event is not treated as the callback.
- Support for comment nodes
<div>{/* this is a comment and won't be rendered */}</div>
- Children are now transformed directly into arguments instead of being wrapped in an array
E.g.
<div><Component1/><Component2/></div>
is transformed intoReact.DOM.div(null, Component1(null), Component2(null))
. Previously this would be transformed intoReact.DOM.div(null, [Component1(null), Component2(null)])
. If you were using React without JSX previously, your code should still work.
- Fixed a number of bugs when transforming directories
- No longer re-write
require()
s to be relative unless specified
- Allow reusing the same DOM node to render different components. e.g.
React.renderComponent(<div/>, domNode); React.renderComponent(<span/>, domNode);
will work now.
- Improved the in-browser transformer so that transformed scripts will execute in the expected scope. The allows components to be defined and used from separate files.
- Upgrade Commoner so
require
statements are no longer relativized when passing through the transformer. This was a feature needed when building React, but doesn't translate well for other consumers ofbin/jsx
. - Upgraded our dependencies on Commoner and Recast so they use a different directory for their cache.
- Freeze our Esprima dependency.
- Improved compatibility with other coding styles (specifically, multiple assignments with a single
var
).
- Switch from using the browserified build to shipping individual modules. This allows react-tools to be used with browserify.
- Fix bug in packaging resulting in broken module.
- Initial public release