38 Pull requests merged by 7 people

• [compiler] Delete PropagatePhiTypes

  #34107 merged Aug 4, 2025

• [compiler] rebase #32285

  #34102 merged Aug 4, 2025

• [compiler] Add repros for various invariants

  #34099 merged Aug 4, 2025

• [DevTools] Consume SuspenseNodes that were skipped when we're bailing out of a subtree

  #34082 merged Aug 4, 2025

• [DevTools] Tweak the presentation of the Promise value

  #34097 merged Aug 4, 2025

• [DevTools] Add structure full stack parsing to DevTools

  #34093 merged Aug 4, 2025

• [DevTools] Style clickable Owner components with angle brackets and bold

  #34096 merged Aug 4, 2025

• [DevTools] Make a non-editable name of KeyValue clickable

  #34095 merged Aug 4, 2025

• [DevTools] Only show state for ClassComponents

  #34091 merged Aug 4, 2025

• fix: apply initial horizontal offset on tree mount

  #34088 merged Aug 4, 2025

• [Flight] Allow Temporary References to be awaited

  #34084 merged Aug 2, 2025

• Allow returning a temporary reference inside an async function

  #33761 merged Aug 2, 2025

• [compiler] Improve merging of scopes that invalidate together

  #34049 merged Aug 1, 2025

• [compiler] Add definitions for Object entries/keys/values

  #34047 merged Aug 1, 2025

• [Flight] Fix debug info leaking to outer handler

  #34081 merged Aug 1, 2025

• [compiler] Emit more specific error when making identifiers with reserved words

  #34080 merged Aug 1, 2025

• [DevTools] Lazily compute initial Tree state

  #34078 merged Aug 1, 2025

• [DevTools] Clean up Virtual Instances from id map

  #34063 merged Jul 31, 2025

• [DevTools] Model Hidden Offscreen Boundaries as Unmounts

  #34062 merged Jul 31, 2025

• [Fizz] Count Boundary bytes that may contribute to the preamble in the request byteSize

  #34059 merged Jul 31, 2025

• [Fizz] Don't outline Boundaries that may contribute to the preamble

  #34058 merged Jul 31, 2025

• [DevTools] No suspending above the root

  #34055 merged Jul 30, 2025

• [DevTools] Keep a Suspense Tree Parellel to the Instance tree in the Backend

  #34050 merged Jul 30, 2025

• [DevTools] Layout for Suspense tab

  #34042 merged Jul 30, 2025

• Enable ref validation in linter

  #34044 merged Jul 29, 2025

• [compiler] Allow assigning ref-accessing functions to objects if not mutated

  #34026 merged Jul 29, 2025

• [compiler] disallow ref access in state initializer, reducer/initializer

  #34025 merged Jul 29, 2025

• [compiler] ref guards apply up to fallthrough of the test

  #34024 merged Jul 29, 2025

• [compiler] treat ref-like identifiers as refs by default

  #34005 merged Jul 29, 2025

• [compiler] Allow passing refs to render helpers

  #34006 merged Jul 29, 2025

• [compiler] Allow mergeRefs pattern (and detect refs passed as ref prop)

  #34004 merged Jul 29, 2025

• [compiler] Improve ref validation error message

  #34003 merged Jul 29, 2025

• [compiler] Fixes to enableTreatRefLikeIdentifiersAsRefs

  #34000 merged Jul 29, 2025

• [eslint] Disallow use within try/catch blocks

  #34040 merged Jul 29, 2025

• [Fiber] Treat unwrapping React.lazy more like a use()

  #34031 merged Jul 29, 2025

• [DevTools] More robust resize handling

  #34036 merged Jul 29, 2025

• [DevTools] Swap Components tab layout based on container size

  #34035 merged Jul 29, 2025

• [DevTools] Silence unactionable bundle warnings in shell

  #34034 merged Jul 29, 2025

18 Pull requests opened by 7 people

• Repro for the "rendered more hooks" bug

  #34051 opened Jul 30, 2025

• bugfix: fix eager state miss https://github.com/facebook/react/issues…

  #34065 opened Jul 31, 2025

• fix: rendered more hooks issue with conditional `use`

  #34068 opened Jul 31, 2025

• Fix fragmentInstance#compareDocumentPosition nesting and portal cases

  #34069 opened Jul 31, 2025

• [DevTools] Send suspense nodes to frontend store

  #34070 opened Jul 31, 2025

• [DevTools] Fixture for Suspense tree operations

  #34073 opened Jul 31, 2025

• Fix form state reset when component state is updated

  #34075 opened Aug 1, 2025

• [eslint-plugin-react-hooks][RulesOfHooks] handle React.useEffect in addition to useEffect

  #34076 opened Aug 1, 2025

• [Flight] Copy the name field of a serialized function debug value

  #34085 opened Aug 2, 2025

• [DevTools] Disconnect and Reconnect children of Suspense boundaries instead of Unmounting and Mounting

  #34089 opened Aug 3, 2025

• [DevTools] Measure the Rectangle of Suspense boundaries as we reconcile

  #34090 opened Aug 4, 2025

• [DevTools] Source Map Stack Traces such in await locations

  #34094 opened Aug 4, 2025

• [compiler] Fix codegen for nested method calls with memoized properties

  #34100 opened Aug 4, 2025

• [DevTools] Prefer I/O stack and show await stack after only if it's a different owner

  #34101 opened Aug 4, 2025

• Add compareDocumentPosition to Fabric FragmentInstance

  #34103 opened Aug 4, 2025

• [DevTools] Don't bailout update for filtered instance

  #34104 opened Aug 4, 2025

• [DevTools] Sort "Suspended By" view by the start time

  #34105 opened Aug 4, 2025

• [DevTools] Add Badge to Owners and sometimes stack traces

  #34106 opened Aug 4, 2025

26 Issues closed by 6 people

• Using `use()` as name for custom hooks

  #34054 closed Aug 5, 2025

• Bug:

  #34110 closed Aug 5, 2025

• Bug: Troy Wilson Landry

  #34109 closed Aug 5, 2025

• There's a lot of content on this but I'm confused 😵‍💫. The eslint rule `react-hooks/exhaustive-deps` throws a warning when we put nested properties from hook-returned objects into the dependency array.

  #34092 closed Aug 5, 2025

• Bug: What the issues

  #33132 closed Aug 4, 2025

• next-themes not working with React 19.0.0-rc-66855b96-20241106

  #31576 closed Aug 4, 2025

• [React 19] Bug: optimisticState is updated with both new state and optimisticValue in useOptimistic

  #31944 closed Aug 4, 2025

• Bug:

  #34087 closed Aug 3, 2025

• Bug: Server functions error when returning a client reference

  #33534 closed Aug 2, 2025

• Bug: Persistent Re-render Issue Despite Optimizations (React 18, Next.js, Hooks, Context)

  #33034 closed Aug 2, 2025

• Bug: useId() causes hydration mismatch when called inside conditionally rendered loops during SSR

  #33779 closed Aug 2, 2025

• [Compiler Bug]: False positive memoization for spead/rest props

  #34077 closed Aug 1, 2025

• [Compiler]: unnecessary memoization of non-primitive arguments in native React hooks

  #33031 closed Jul 31, 2025

• [Compiler Bug]:

  #34056 closed Jul 30, 2025

• Bug: useTransition and uSES do not work together, uT is not resilient to amount-of-render

  #26814 closed Jul 30, 2025

• [Compiler Bug]: Inconsistent errors between React Compiler Playground and latest experimental npm package

  #34018 closed Jul 29, 2025

• [Compiler Bug]: InvalidReact: Ref values (the `current` property) may not be accessed during render. False Positive

  #32320 closed Jul 29, 2025

• [Compiler Bug]: Does not check for ref access in useState initial value function

  #31418 closed Jul 29, 2025

• [Compiler]: Suppressing ref validation errors makes it unclear why code accessing refs is unmemoized

  #33223 closed Jul 29, 2025

• [Compiler]: flags mutations of shared mutable refs and skips optimizations

  #33209 closed Jul 29, 2025

• [Compiler Bug]: Ref values may not be accessed during render when using `mergeRefs`

  #31742 closed Jul 29, 2025

• [Compiler Bug]: "Mutating a value returned from 'useContext()', which should not be mutated" When the value is a Ref

  #31470 closed Jul 29, 2025

• [Compiler Bug]: Compiler doesn't catch ref access in render

  #31406 closed Jul 29, 2025

• [Compiler]: passing `ref` to render prop will void optimization

  #33208 closed Jul 29, 2025

• [Compiler Bug]: eslint-plugin-react-compiler errors when updating initialization of ref.current

  #30782 closed Jul 29, 2025

• Bug: react-dom/client does not provide an export named 'createRoot'

  #34019 closed Jul 29, 2025

14 Issues opened by 12 people

• Bug: "Internal React error: Expected static flag was missing."

  #34111 opened Aug 5, 2025

• [Compiler Bug]: Compiler introduces unnecessary breaks that skips its own memoization

  #34108 opened Aug 5, 2025

• Bug: `Transition was aborted because of invalid state` when browser tab not active

  #34098 opened Aug 4, 2025

• Bug: renderToStaticMarkup fails with client-side code, suggesting a server-only context limitation

  #34079 opened Aug 1, 2025

• Bug: ESLint react-hooks/rules-of-hooks: false positive `XXX` is a function created with React Hook "useEffectEvent", and can only be called from the same component

  #34074 opened Aug 1, 2025

• [Compiler Bug]: "Internal error: MethodCall::property must be an unpromoted..." on specific Math.floor, Math.ceil usages

  #34072 opened Jul 31, 2025

• Bug: React 18 vs 19 callback refs

  #34071 opened Jul 31, 2025

• Bug: eager state miss

  #34061 opened Jul 31, 2025

• Adding `sideEffects: false` to package.json

  #34057 opened Jul 30, 2025

• Bug: Java object is gone Instagram/ Facebook Webview

  #34053 opened Jul 30, 2025

• Question about "calling an impure function can produce unstable results..." lint

  #34048 opened Jul 29, 2025

• [Compiler Bug]: False positive for “impure function during render” inside callback

  #34046 opened Jul 29, 2025

• [Compiler Bug]: False positives “calling setState synchronously within an effect body” with stable primitive values

  #34045 opened Jul 29, 2025

• Bug: `<dialog>` onClose and onCancel events bubbling

  #34038 opened Jul 29, 2025

42 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• [compiler] Detect known incompatible libraries

  #34027 commented on Jul 29, 2025 • 1 new comment

• Bug: `use` function doesn't warn about uncached promise when promise doesn't resolve immediately

  #31790 commented on Aug 4, 2025 • 0 new comments

• [Compiler Bug]: Coverage report shows missing branch coverage

  #32950 commented on Aug 4, 2025 • 0 new comments

• Bug: Uncontrolled `<input />` element has value attribute removed

  #32576 commented on Aug 5, 2025 • 0 new comments

• "Should not already be working" in Firefox after a breakpoint/alert

  #17355 commented on Aug 5, 2025 • 0 new comments

• Bug: Issue in the sidebar components with still using hsl

  #34011 commented on Aug 5, 2025 • 0 new comments

• [React 19] allow opting out of automatic form reset when Form Actions are used

  #29034 commented on Aug 5, 2025 • 0 new comments

• [Compiler Bug]: Todo: (BuildHIR::lowerExpression) Handle ??= operators in AssignmentExpression (164:164)

  #33315 commented on Aug 5, 2025 • 0 new comments

• [Compiler Bug]: TypeError: isUndefined is not a function (it is undefined)

  #33052 commented on Aug 5, 2025 • 0 new comments

• [compiler] Migrate PruneNonEscapingScopes to HIR

  #31882 commented on Aug 4, 2025 • 0 new comments

• [DevTools] Use Popover API for component inspect overlays

  #32703 commented on Jul 29, 2025 • 0 new comments

• [reconciler] Mark moved fibers with placement flag granularly and cache host sibling lookups during commit

  #33048 commented on Jul 30, 2025 • 0 new comments

• [compiler] Add try/catch to safely read files during healthcheck

  #33098 commented on Jul 31, 2025 • 0 new comments

• [compiler] Propagate CreateFunction effects for functions that return functions

  #33642 commented on Aug 4, 2025 • 0 new comments

• [compiler] Repro for missed case of global mutation

  #33643 commented on Aug 4, 2025 • 0 new comments

• [compiler] Infer render helpers for additional validation

  #33647 commented on Aug 4, 2025 • 0 new comments

• [compiler] InferEffects uses effects as value keys

  #33650 commented on Aug 4, 2025 • 0 new comments

• Replace `rm -rf` with `fs-extra.remove` for cross-platform script compatibility

  #33795 commented on Jul 29, 2025 • 0 new comments

• [compiler] Remove old mutation/aliasing implementation

  #34028 commented on Jul 30, 2025 • 0 new comments

• [compiler] Remove now-unused FunctionEffect type

  #34029 commented on Jul 29, 2025 • 0 new comments

• [Fiber] Deprecate "Throw a Promise" technique

  #34032 commented on Jul 29, 2025 • 0 new comments

• Bug: Hydration mismatch error due to plugins generating script tag on top

  #24430 commented on Jul 29, 2025 • 0 new comments

• [React 19] Bug: `cloneElement` in client component with async server component as children not working

  #32392 commented on Jul 29, 2025 • 0 new comments

• Bug: nested Suspense with lazy children permanently shows fallback

  #32313 commented on Jul 29, 2025 • 0 new comments

• Bug: Using custom elements with createPortal() in a documentPictureInPicture window is failing

  #33783 commented on Jul 29, 2025 • 0 new comments

• [DevTools Bug]: Firefox devtools extension doesn't work with React 19

  #32836 commented on Jul 29, 2025 • 0 new comments

• [Compiler Bug]: "Ref values (the `current` property) may not be accessed during render" but there is no value access

  #32261 commented on Jul 29, 2025 • 0 new comments

• Bug: Rendered more hooks than during the previous render when component calls use(thenable) after hydration in a specific transition

  #33580 commented on Jul 30, 2025 • 0 new comments

• [React 19] react-reconciler README is missing scheduler and form hooks

  #28956 commented on Jul 30, 2025 • 0 new comments

• Bug: React Dev Tools does not have a Google Chrome Store Established Publisher badge

  #32743 commented on Jul 30, 2025 • 0 new comments

• Bug: useFormStatus pending state is reset when component state is updated

  #30368 commented on Jul 31, 2025 • 0 new comments

• Bug:

  #33586 commented on Jul 31, 2025 • 0 new comments

• Bug: `StrictMode` reruns effects when a child is moved in an array

  #32561 commented on Jul 31, 2025 • 0 new comments

• head > meta > content escaping issue

  #13838 commented on Aug 1, 2025 • 0 new comments

• Bug: Support command event

  #32478 commented on Aug 1, 2025 • 0 new comments

• Bug: New Customizable Select: option containing span, Select containing button causes hydration warning

  #33038 commented on Aug 1, 2025 • 0 new comments

• Bug: Maximum update depth exceeded appears in frequent onDrop scenarios

  #33090 commented on Aug 2, 2025 • 0 new comments

• [React 19] Suspense throttling behavior (`FALLBACK_THROTTLE_MS`) kicks in too often

  #31819 commented on Aug 2, 2025 • 0 new comments

• Bug: Impossible to use on async hooks

  #21381 commented on Aug 3, 2025 • 0 new comments

• Bug: `react-hooks/exhaustive-deps` does more than checking deps and cannot be configured for intended behavior

  #33703 commented on Aug 3, 2025 • 0 new comments

• Bug: [React 19] When both "dangerouslySetInnerHTML={{ __html: '' }}" and "suppressHydrationWarning" are used together, the hydration process is not canceled as anticipated.

  #32975 commented on Aug 4, 2025 • 0 new comments

• Bug: Quickly selecting checkboxes on iOS doesn't work correctly

  #31260 commented on Aug 4, 2025 • 0 new comments