Reset packages we are not releasing to currently published versions

https://www.npmjs.com/package/eslint-plugin-react-hooks/v/6.0.0 was just
released, so we can bump this now.

.github/workflows/runtime_build_and_test.yml

@@ -6,6 +6,12 @@ on:
   pull_request:
     paths-ignore:
       - compiler/**
+  workflow_dispatch:
+    inputs:
+      commit_sha:
+        required: false
+        type: string
+        default: ''
 
 permissions: {}
 
@@ -28,7 +34,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - name: Check cache hit
         uses: actions/cache/restore@v4
         id: node_modules
@@ -69,7 +75,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - name: Check cache hit
         uses: actions/cache/restore@v4
         id: node_modules
@@ -117,7 +123,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/github-script@v7
         id: set-matrix
         with:
@@ -136,7 +142,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -166,7 +172,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -198,7 +204,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -254,7 +260,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -294,7 +300,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -389,7 +395,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -430,7 +436,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -458,7 +464,7 @@ jobs:
           merge-multiple: true
       - name: Display structure of build
         run: ls -R build
-      - run: echo ${{ github.event.pull_request.head.sha || github.sha }} >> build/COMMIT_SHA
+      - run: echo ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }} >> build/COMMIT_SHA
       - name: Scrape warning messages
         run: |
           mkdir -p ./build/__test_utils__
@@ -483,7 +489,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -523,7 +529,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -560,7 +566,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -601,7 +607,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -675,7 +681,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -732,7 +738,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -777,7 +783,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          ref: ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }}
       - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
@@ -822,7 +828,7 @@ jobs:
           node ./scripts/print-warnings/print-warnings.js > build/__test_utils__/ReactAllWarnings.js
       - name: Display structure of build for PR
         run: ls -R build
-      - run: echo ${{ github.event.pull_request.head.sha || github.sha }} >> build/COMMIT_SHA
+      - run: echo ${{ github.event.inputs.commit_sha != '' && github.event.inputs.commit_sha || github.event.pull_request.head.sha || github.sha }} >> build/COMMIT_SHA
       - run: node ./scripts/tasks/danger
       - name: Archive sizebot results
         uses: actions/upload-artifact@v4

ReactVersions.js

@@ -18,7 +18,7 @@
 //
 //   0.0.0-experimental-241c4467e-20200129
 
-const ReactVersion = '19.1.0';
+const ReactVersion = '19.1.1';
 
 // The label used by the @canary channel. Represents the upcoming release's
 // stability. Most of the time, this will be "canary", but we may temporarily
@@ -34,7 +34,7 @@ const rcNumber = 0;
 
 const stablePackages = {
   'eslint-plugin-react-hooks': '5.2.0',
-  'jest-react': '0.17.0',
+  'jest-react': '0.16.0',
   react: ReactVersion,
   'react-art': ReactVersion,
   'react-dom': ReactVersion,

packages/react-art/package.json

@@ -1,7 +1,7 @@
 {
   "name": "react-art",
   "description": "React ART is a JavaScript library for drawing vector graphics using React. It provides declarative and reactive bindings to the ART library. Using the same declarative API you can render the output to either Canvas, SVG or VML (IE8).",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "main": "index.js",
   "repository": {
     "type": "git",
@@ -24,10 +24,10 @@
   "dependencies": {
     "art": "^0.10.1",
     "create-react-class": "^15.6.2",
-    "scheduler": "^0.25.0"
+    "scheduler": "^0.26.0"
   },
   "peerDependencies": {
-    "react": "^19.0.0"
+    "react": "^19.1.1"
   },
   "files": [
     "LICENSE",
@@ -38,4 +38,4 @@
     "Rectangle.js",
     "Wedge.js"
   ]
-}
+}

packages/react-client/src/ReactFlightClient.js

@@ -2438,7 +2438,7 @@ function buildFakeTask(
 }
 
 const createFakeJSXCallStack = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     response: Response,
     stack: ReactStackTrace,
     environmentName: string,
@@ -2459,7 +2459,7 @@ const createFakeJSXCallStackInDEV: (
   environmentName: string,
 ) => Error = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (createFakeJSXCallStack['react-stack-bottom-frame'].bind(
+    (createFakeJSXCallStack.react_stack_bottom_frame.bind(
       createFakeJSXCallStack,
     ): any)
   : (null: any);
@@ -2563,7 +2563,7 @@ function getCurrentStackInDEV(): string {
 }
 
 const replayConsoleWithCallStack = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     response: Response,
     methodName: string,
     stackTrace: ReactStackTrace,
@@ -2614,7 +2614,7 @@ const replayConsoleWithCallStackInDEV: (
   args: Array<mixed>,
 ) => void = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (replayConsoleWithCallStack['react-stack-bottom-frame'].bind(
+    (replayConsoleWithCallStack.react_stack_bottom_frame.bind(
       replayConsoleWithCallStack,
     ): any)
   : (null: any);

packages/react-devtools-shared/src/backend/fiber/renderer.js

@@ -50,6 +50,7 @@ import {
   gt,
   gte,
   parseSourceFromComponentStack,
+  parseSourceFromOwnerStack,
   serializeToString,
 } from 'react-devtools-shared/src/backend/utils';
 import {
@@ -5758,15 +5759,13 @@ export function attach(
   function getSourceForFiberInstance(
     fiberInstance: FiberInstance,
   ): Source | null {
-    const unresolvedSource = fiberInstance.source;
-    if (
-      unresolvedSource !== null &&
-      typeof unresolvedSource === 'object' &&
-      !isError(unresolvedSource)
-    ) {
-      // $FlowFixMe: isError should have refined it.
-      return unresolvedSource;
+    // Favor the owner source if we have one.
+    const ownerSource = getSourceForInstance(fiberInstance);
+    if (ownerSource !== null) {
+      return ownerSource;
     }
+
+    // Otherwise fallback to the throwing trick.
     const dispatcherRef = getDispatcherRef(renderer);
     const stackFrame =
       dispatcherRef == null
@@ -5777,10 +5776,7 @@ export function attach(
             dispatcherRef,
           );
     if (stackFrame === null) {
-      // If we don't find a source location by throwing, try to get one
-      // from an owned child if possible. This is the same branch as
-      // for virtual instances.
-      return getSourceForInstance(fiberInstance);
+      return null;
     }
     const source = parseSourceFromComponentStack(stackFrame);
     fiberInstance.source = source;
@@ -5788,7 +5784,7 @@ export function attach(
   }
 
   function getSourceForInstance(instance: DevToolsInstance): Source | null {
-    let unresolvedSource = instance.source;
+    const unresolvedSource = instance.source;
     if (unresolvedSource === null) {
       // We don't have any source yet. We can try again later in case an owned child mounts later.
       // TODO: We won't have any information here if the child is filtered.
@@ -5801,7 +5797,9 @@ export function attach(
     // any intermediate utility functions. This won't point to the top of the component function
     // but it's at least somewhere within it.
     if (isError(unresolvedSource)) {
-      unresolvedSource = formatOwnerStack((unresolvedSource: any));
+      return (instance.source = parseSourceFromOwnerStack(
+        (unresolvedSource: any),
+      ));
     }
     if (typeof unresolvedSource === 'string') {
       const idx = unresolvedSource.lastIndexOf('\n');

packages/react-devtools-shared/src/backend/shared/DevToolsOwnerStack.js

@@ -13,8 +13,12 @@ export function formatOwnerStack(error: Error): string {
   const prevPrepareStackTrace = Error.prepareStackTrace;
   // $FlowFixMe[incompatible-type] It does accept undefined.
   Error.prepareStackTrace = undefined;
-  let stack = error.stack;
+  const stack = error.stack;
   Error.prepareStackTrace = prevPrepareStackTrace;
+  return formatOwnerStackString(stack);
+}
+
+export function formatOwnerStackString(stack: string): string {
   if (stack.startsWith('Error: react-stack-top-frame\n')) {
     // V8's default formatting prefixes with the error message which we
     // don't want/need.
@@ -25,7 +29,10 @@ export function formatOwnerStack(error: Error): string {
     // Pop the JSX frame.
     stack = stack.slice(idx + 1);
   }
-  idx = stack.indexOf('react-stack-bottom-frame');
+  idx = stack.indexOf('react_stack_bottom_frame');
+  if (idx === -1) {
+    idx = stack.indexOf('react-stack-bottom-frame');
+  }
   if (idx !== -1) {
     idx = stack.lastIndexOf('\n', idx);
   }

packages/react-devtools-shared/src/backend/utils/index.js

@@ -18,6 +18,8 @@ import type {DehydratedData} from 'react-devtools-shared/src/frontend/types';
 export {default as formatWithStyles} from './formatWithStyles';
 export {default as formatConsoleArguments} from './formatConsoleArguments';
 
+import {formatOwnerStackString} from '../shared/DevToolsOwnerStack';
+
 // TODO: update this to the first React version that has a corresponding DevTools backend
 const FIRST_DEVTOOLS_BACKEND_LOCKSTEP_VER = '999.9.9';
 export function hasAssignedBackend(version?: string): boolean {
@@ -345,6 +347,81 @@ export function parseSourceFromComponentStack(
   return parseSourceFromFirefoxStack(componentStack);
 }
 
+let collectedLocation: Source | null = null;
+
+function collectStackTrace(
+  error: Error,
+  structuredStackTrace: CallSite[],
+): string {
+  let result: null | Source = null;
+  // Collect structured stack traces from the callsites.
+  // We mirror how V8 serializes stack frames and how we later parse them.
+  for (let i = 0; i < structuredStackTrace.length; i++) {
+    const callSite = structuredStackTrace[i];
+    const name = callSite.getFunctionName();
+    if (
+      name.includes('react_stack_bottom_frame') ||
+      name.includes('react-stack-bottom-frame')
+    ) {
+      // We pick the last frame that matches before the bottom frame since
+      // that will be immediately inside the component as opposed to some helper.
+      // If we don't find a bottom frame then we bail to string parsing.
+      collectedLocation = result;
+      // Skip everything after the bottom frame since it'll be internals.
+      break;
+    } else {
+      const sourceURL = callSite.getScriptNameOrSourceURL();
+      const line =
+        // $FlowFixMe[prop-missing]
+        typeof callSite.getEnclosingLineNumber === 'function'
+          ? (callSite: any).getEnclosingLineNumber()
+          : callSite.getLineNumber();
+      const col =
+        // $FlowFixMe[prop-missing]
+        typeof callSite.getEnclosingColumnNumber === 'function'
+          ? (callSite: any).getEnclosingColumnNumber()
+          : callSite.getLineNumber();
+      if (!sourceURL || !line || !col) {
+        // Skip eval etc. without source url. They don't have location.
+        continue;
+      }
+      result = {
+        sourceURL,
+        line: line,
+        column: col,
+      };
+    }
+  }
+  // At the same time we generate a string stack trace just in case someone
+  // else reads it.
+  const name = error.name || 'Error';
+  const message = error.message || '';
+  let stack = name + ': ' + message;
+  for (let i = 0; i < structuredStackTrace.length; i++) {
+    stack += '\n    at ' + structuredStackTrace[i].toString();
+  }
+  return stack;
+}
+
+export function parseSourceFromOwnerStack(error: Error): Source | null {
+  // First attempt to collected the structured data using prepareStackTrace.
+  collectedLocation = null;
+  const previousPrepare = Error.prepareStackTrace;
+  Error.prepareStackTrace = collectStackTrace;
+  let stack;
+  try {
+    stack = error.stack;
+  } finally {
+    Error.prepareStackTrace = previousPrepare;
+  }
+  if (collectedLocation !== null) {
+    return collectedLocation;
+  }
+  // Fallback to parsing the string form.
+  const componentStack = formatOwnerStackString(stack);
+  return parseSourceFromComponentStack(componentStack);
+}
+
 // 0.123456789 => 0.123
 // Expects high-resolution timestamp in milliseconds, like from performance.now()
 // Mainly used for optimizing the size of serialized profiling payload

packages/react-dom-bindings/package.json

@@ -1,7 +1,7 @@
 {
   "name": "react-dom-bindings",
   "description": "React implementation details for react-dom.",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "private": true,
   "main": "index.js",
   "repository": {
@@ -18,6 +18,6 @@
   },
   "homepage": "https://react.dev/",
   "peerDependencies": {
-    "react": "^19.0.0"
+    "react": "^19.0.1"
   }
 }

packages/react-dom/package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-dom",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "description": "React package for working with the DOM.",
   "main": "index.js",
   "repository": {
@@ -17,10 +17,10 @@
   },
   "homepage": "https://react.dev/",
   "dependencies": {
-    "scheduler": "^0.25.0"
+    "scheduler": "^0.26.0"
   },
   "peerDependencies": {
-    "react": "^19.0.0"
+    "react": "^19.1.1"
   },
   "files": [
     "LICENSE",
@@ -123,4 +123,4 @@
     "./server.js": "./server.browser.js",
     "./static.js": "./static.browser.js"
   }
-}
+}

packages/react-is/package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-is",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "description": "Brand checking of React Elements.",
   "main": "index.js",
   "sideEffects": false,

packages/react-markup/package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-markup",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "description": "React package generating embedded markup such as e-mails with support for Server Components.",
   "main": "index.js",
   "repository": {
@@ -17,7 +17,7 @@
   },
   "homepage": "https://react.dev/",
   "peerDependencies": {
-    "react": "^19.0.0"
+    "react": "^19.0.1"
   },
   "files": [
     "LICENSE",

packages/react-native-renderer/package.json

@@ -8,9 +8,9 @@
     "directory": "packages/react-native-renderer"
   },
   "dependencies": {
-    "scheduler": "^0.25.0"
+    "scheduler": "^0.26.0"
   },
   "peerDependencies": {
     "react": "^18.0.0"
   }
-}
+}

packages/react-native-renderer/src/ReactFiberConfigFabric.js

@@ -58,7 +58,6 @@ import {
 } from './ReactNativeFiberInspector';
 
 import {
-  enableFabricCompleteRootInCommitPhase,
   passChildrenWhenCloningPersistedNodes,
   enableLazyPublicInstanceInFabric,
 } from 'shared/ReactFeatureFlags';
@@ -534,19 +533,14 @@ export function finalizeContainerChildren(
   container: Container,
   newChildren: ChildSet,
 ): void {
-  if (!enableFabricCompleteRootInCommitPhase) {
-    completeRoot(container.containerTag, newChildren);
-  }
+  // Noop - children will be replaced in replaceContainerChildren
 }
 
 export function replaceContainerChildren(
   container: Container,
   newChildren: ChildSet,
 ): void {
-  // Noop - children will be replaced in finalizeContainerChildren
-  if (enableFabricCompleteRootInCommitPhase) {
-    completeRoot(container.containerTag, newChildren);
-  }
+  completeRoot(container.containerTag, newChildren);
 }
 
 export {getClosestInstanceFromNode as getInstanceFromNode};

packages/react-reconciler/package.json

@@ -1,7 +1,7 @@
 {
   "name": "react-reconciler",
   "description": "React package for creating custom renderers.",
-  "version": "0.32.0",
+  "version": "0.32.1",
   "keywords": [
     "react"
   ],
@@ -26,9 +26,9 @@
     "node": ">=0.10.0"
   },
   "peerDependencies": {
-    "react": "^19.0.0"
+    "react": "^19.1.1"
   },
   "dependencies": {
-    "scheduler": "^0.25.0"
+    "scheduler": "^0.26.0"
   }
-}
+}

packages/react-reconciler/src/ReactFiberCallUserSpace.js

@@ -24,7 +24,7 @@ import {enableUseEffectCRUDOverload} from 'shared/ReactFeatureFlags';
 // TODO: Consider marking the whole bundle instead of these boundaries.
 
 const callComponent = {
-  'react-stack-bottom-frame': function <Props, Arg, R>(
+  react_stack_bottom_frame: function <Props, Arg, R>(
     Component: (p: Props, arg: Arg) => R,
     props: Props,
     secondArg: Arg,
@@ -46,7 +46,7 @@ export const callComponentInDEV: <Props, Arg, R>(
   secondArg: Arg,
 ) => R = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callComponent['react-stack-bottom-frame'].bind(callComponent): any)
+    (callComponent.react_stack_bottom_frame.bind(callComponent): any)
   : (null: any);
 
 interface ClassInstance<R> {
@@ -62,7 +62,7 @@ interface ClassInstance<R> {
 }
 
 const callRender = {
-  'react-stack-bottom-frame': function <R>(instance: ClassInstance<R>): R {
+  react_stack_bottom_frame: function <R>(instance: ClassInstance<R>): R {
     const wasRendering = isRendering;
     setIsRendering(true);
     try {
@@ -77,11 +77,11 @@ const callRender = {
 export const callRenderInDEV: <R>(instance: ClassInstance<R>) => R => R =
   __DEV__
     ? // We use this technique to trick minifiers to preserve the function name.
-      (callRender['react-stack-bottom-frame'].bind(callRender): any)
+      (callRender.react_stack_bottom_frame.bind(callRender): any)
     : (null: any);
 
 const callComponentDidMount = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     finishedWork: Fiber,
     instance: ClassInstance<any>,
   ): void {
@@ -98,13 +98,13 @@ export const callComponentDidMountInDEV: (
   instance: ClassInstance<any>,
 ) => void = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callComponentDidMount['react-stack-bottom-frame'].bind(
+    (callComponentDidMount.react_stack_bottom_frame.bind(
       callComponentDidMount,
     ): any)
   : (null: any);
 
 const callComponentDidUpdate = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     finishedWork: Fiber,
     instance: ClassInstance<any>,
     prevProps: Object,
@@ -127,13 +127,13 @@ export const callComponentDidUpdateInDEV: (
   snaphot: Object,
 ) => void = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callComponentDidUpdate['react-stack-bottom-frame'].bind(
+    (callComponentDidUpdate.react_stack_bottom_frame.bind(
       callComponentDidUpdate,
     ): any)
   : (null: any);
 
 const callComponentDidCatch = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     instance: ClassInstance<any>,
     errorInfo: CapturedValue<mixed>,
   ): void {
@@ -150,13 +150,13 @@ export const callComponentDidCatchInDEV: (
   errorInfo: CapturedValue<mixed>,
 ) => void = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callComponentDidCatch['react-stack-bottom-frame'].bind(
+    (callComponentDidCatch.react_stack_bottom_frame.bind(
       callComponentDidCatch,
     ): any)
   : (null: any);
 
 const callComponentWillUnmount = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     current: Fiber,
     nearestMountedAncestor: Fiber | null,
     instance: ClassInstance<any>,
@@ -175,13 +175,13 @@ export const callComponentWillUnmountInDEV: (
   instance: ClassInstance<any>,
 ) => void = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callComponentWillUnmount['react-stack-bottom-frame'].bind(
+    (callComponentWillUnmount.react_stack_bottom_frame.bind(
       callComponentWillUnmount,
     ): any)
   : (null: any);
 
 const callCreate = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     effect: Effect,
   ): (() => void) | {...} | void | null {
     if (!enableUseEffectCRUDOverload) {
@@ -234,11 +234,11 @@ const callCreate = {
 
 export const callCreateInDEV: (effect: Effect) => (() => void) | void = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callCreate['react-stack-bottom-frame'].bind(callCreate): any)
+    (callCreate.react_stack_bottom_frame.bind(callCreate): any)
   : (null: any);
 
 const callDestroy = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     current: Fiber,
     nearestMountedAncestor: Fiber | null,
     destroy: () => void,
@@ -257,11 +257,11 @@ export const callDestroyInDEV: (
   destroy: (() => void) | (({...}) => void),
 ) => void = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callDestroy['react-stack-bottom-frame'].bind(callDestroy): any)
+    (callDestroy.react_stack_bottom_frame.bind(callDestroy): any)
   : (null: any);
 
 const callLazyInit = {
-  'react-stack-bottom-frame': function (lazy: LazyComponent<any, any>): any {
+  react_stack_bottom_frame: function (lazy: LazyComponent<any, any>): any {
     const payload = lazy._payload;
     const init = lazy._init;
     return init(payload);
@@ -270,5 +270,5 @@ const callLazyInit = {
 
 export const callLazyInitInDEV: (lazy: LazyComponent<any, any>) => any = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callLazyInit['react-stack-bottom-frame'].bind(callLazyInit): any)
+    (callLazyInit.react_stack_bottom_frame.bind(callLazyInit): any)
   : (null: any);

packages/react-reconciler/src/ReactFiberCommitWork.js

@@ -57,6 +57,7 @@ import {
   enableComponentPerformanceTrack,
   enableViewTransition,
   enableFragmentRefs,
+  enableEagerAlternateStateNodeCleanup,
 } from 'shared/ReactFeatureFlags';
 import {
   FunctionComponent,
@@ -1947,6 +1948,20 @@ function commitMutationEffectsOnFiber(
             }
           }
         }
+      } else {
+        if (enableEagerAlternateStateNodeCleanup) {
+          if (supportsPersistence) {
+            if (finishedWork.alternate !== null) {
+              // `finishedWork.alternate.stateNode` is pointing to a stale shadow
+              // node at this point, retaining it and its subtree. To reclaim
+              // memory, point `alternate.stateNode` to new shadow node. This
+              // prevents shadow node from staying in memory longer than it
+              // needs to. The correct behaviour of this is checked by test in
+              // React Native: ShadowNodeReferenceCounter-itest.js#L150
+              finishedWork.alternate.stateNode = finishedWork.stateNode;
+            }
+          }
+        }
       }
       break;
     }

packages/react-server-dom-esm/package.json

@@ -1,7 +1,7 @@
 {
   "name": "react-server-dom-esm",
   "description": "React Server Components bindings for DOM using ESM. This is intended to be integrated into meta-frameworks. It is not intended to be imported directly.",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "keywords": [
     "react"
   ],
@@ -46,8 +46,8 @@
   },
   "main": "index.js",
   "repository": {
-    "type" : "git",
-    "url" : "https://github.com/facebook/react.git",
+    "type": "git",
+    "url": "https://github.com/facebook/react.git",
     "directory": "packages/react-server-dom-esm"
   },
   "engines": {

packages/react-server-dom-fb/package.json

@@ -8,10 +8,10 @@
     "directory": "packages/react-server-dom-fb"
   },
   "dependencies": {
-    "scheduler": "^0.25.0"
+    "scheduler": "^0.26.0"
   },
   "peerDependencies": {
     "react": "^18.0.0",
     "react-dom": "^18.0.0"
   }
-}
+}

packages/react-server-dom-parcel/package.json

@@ -1,7 +1,7 @@
 {
   "name": "react-server-dom-parcel",
   "description": "React Server Components bindings for DOM using Parcel. This is intended to be integrated into meta-frameworks. It is not intended to be imported directly.",
-  "version": "19.0.0",
+  "version": "19.1.1",
   "keywords": [
     "react"
   ],
@@ -71,15 +71,15 @@
   },
   "main": "index.js",
   "repository": {
-    "type" : "git",
-    "url" : "https://github.com/facebook/react.git",
+    "type": "git",
+    "url": "https://github.com/facebook/react.git",
     "directory": "packages/react-server-dom-parcel"
   },
   "engines": {
     "node": ">=0.10.0"
   },
   "peerDependencies": {
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0"
+    "react": "^19.1.1",
+    "react-dom": "^19.1.1"
   }
 }

packages/react-server-dom-turbopack/package.json

@@ -1,7 +1,7 @@
 {
   "name": "react-server-dom-turbopack",
   "description": "React Server Components bindings for DOM using Turbopack. This is intended to be integrated into meta-frameworks. It is not intended to be imported directly.",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "keywords": [
     "react"
   ],
@@ -79,8 +79,8 @@
     "node": ">=0.10.0"
   },
   "peerDependencies": {
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0"
+    "react": "^19.1.1",
+    "react-dom": "^19.1.1"
   },
   "dependencies": {
     "acorn-loose": "^8.3.0",

packages/react-server-dom-webpack/package.json

@@ -1,7 +1,7 @@
 {
   "name": "react-server-dom-webpack",
   "description": "React Server Components bindings for DOM using Webpack. This is intended to be integrated into meta-frameworks. It is not intended to be imported directly.",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "keywords": [
     "react"
   ],
@@ -100,8 +100,8 @@
     "node": ">=0.10.0"
   },
   "peerDependencies": {
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0",
+    "react": "^19.1.1",
+    "react-dom": "^19.1.1",
     "webpack": "^5.59.0"
   },
   "dependencies": {

packages/react-server/src/ReactFizzCallUserSpace.js

@@ -13,7 +13,7 @@ import type {LazyComponent} from 'react/src/ReactLazy';
 // TODO: Consider marking the whole bundle instead of these boundaries.
 
 const callComponent = {
-  'react-stack-bottom-frame': function <Props, Arg, R>(
+  react_stack_bottom_frame: function <Props, Arg, R>(
     Component: (p: Props, arg: Arg) => R,
     props: Props,
     secondArg: Arg,
@@ -28,7 +28,7 @@ export const callComponentInDEV: <Props, Arg, R>(
   secondArg: Arg,
 ) => R = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callComponent['react-stack-bottom-frame'].bind(callComponent): any)
+    (callComponent.react_stack_bottom_frame.bind(callComponent): any)
   : (null: any);
 
 interface ClassInstance<R> {
@@ -36,7 +36,7 @@ interface ClassInstance<R> {
 }
 
 const callRender = {
-  'react-stack-bottom-frame': function <R>(instance: ClassInstance<R>): R {
+  react_stack_bottom_frame: function <R>(instance: ClassInstance<R>): R {
     return instance.render();
   },
 };
@@ -44,11 +44,11 @@ const callRender = {
 export const callRenderInDEV: <R>(instance: ClassInstance<R>) => R => R =
   __DEV__
     ? // We use this technique to trick minifiers to preserve the function name.
-      (callRender['react-stack-bottom-frame'].bind(callRender): any)
+      (callRender.react_stack_bottom_frame.bind(callRender): any)
     : (null: any);
 
 const callLazyInit = {
-  'react-stack-bottom-frame': function (lazy: LazyComponent<any, any>): any {
+  react_stack_bottom_frame: function (lazy: LazyComponent<any, any>): any {
     const payload = lazy._payload;
     const init = lazy._init;
     return init(payload);
@@ -57,5 +57,5 @@ const callLazyInit = {
 
 export const callLazyInitInDEV: (lazy: LazyComponent<any, any>) => any = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callLazyInit['react-stack-bottom-frame'].bind(callLazyInit): any)
+    (callLazyInit.react_stack_bottom_frame.bind(callLazyInit): any)
   : (null: any);

packages/react-server/src/ReactFlightCallUserSpace.js

@@ -19,7 +19,7 @@ import {setCurrentOwner} from './flight/ReactFlightCurrentOwner';
 // TODO: Consider marking the whole bundle instead of these boundaries.
 
 const callComponent = {
-  'react-stack-bottom-frame': function <Props, R>(
+  react_stack_bottom_frame: function <Props, R>(
     Component: (p: Props, arg: void) => R,
     props: Props,
     componentDebugInfo: ReactComponentInfo,
@@ -41,11 +41,11 @@ export const callComponentInDEV: <Props, R>(
   componentDebugInfo: ReactComponentInfo,
 ) => R = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callComponent['react-stack-bottom-frame'].bind(callComponent): any)
+    (callComponent.react_stack_bottom_frame.bind(callComponent): any)
   : (null: any);
 
 const callLazyInit = {
-  'react-stack-bottom-frame': function (lazy: LazyComponent<any, any>): any {
+  react_stack_bottom_frame: function (lazy: LazyComponent<any, any>): any {
     const payload = lazy._payload;
     const init = lazy._init;
     return init(payload);
@@ -54,11 +54,11 @@ const callLazyInit = {
 
 export const callLazyInitInDEV: (lazy: LazyComponent<any, any>) => any = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callLazyInit['react-stack-bottom-frame'].bind(callLazyInit): any)
+    (callLazyInit.react_stack_bottom_frame.bind(callLazyInit): any)
   : (null: any);
 
 const callIterator = {
-  'react-stack-bottom-frame': function (
+  react_stack_bottom_frame: function (
     iterator: $AsyncIterator<ReactClientValue, ReactClientValue, void>,
     progress: (
       entry:
@@ -81,5 +81,5 @@ export const callIteratorInDEV: (
   error: (reason: mixed) => void,
 ) => void = __DEV__
   ? // We use this technique to trick minifiers to preserve the function name.
-    (callIterator['react-stack-bottom-frame'].bind(callIterator): any)
+    (callIterator.react_stack_bottom_frame.bind(callIterator): any)
   : (null: any);

packages/react-server/src/ReactFlightStackConfigV8.js

@@ -45,7 +45,7 @@ export function parseStackTrace(
     // don't want/need.
     stack = stack.slice(29);
   }
-  let idx = stack.indexOf('react-stack-bottom-frame');
+  let idx = stack.indexOf('react_stack_bottom_frame');
   if (idx !== -1) {
     idx = stack.lastIndexOf('\n', idx);
   }

packages/react-test-renderer/package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-test-renderer",
-  "version": "19.1.0",
+  "version": "19.1.1",
   "description": "React package for snapshot testing.",
   "main": "index.js",
   "repository": {
@@ -19,11 +19,11 @@
   },
   "homepage": "https://react.dev/",
   "dependencies": {
-    "react-is": "^19.0.0",
-    "scheduler": "^0.25.0"
+    "react-is": "^19.1.1",
+    "scheduler": "^0.26.0"
   },
   "peerDependencies": {
-    "react": "^19.0.0"
+    "react": "^19.1.1"
   },
   "files": [
     "LICENSE",
@@ -32,4 +32,4 @@
     "shallow.js",
     "cjs/"
   ]
-}
+}

packages/react/package.json

@@ -4,7 +4,7 @@
   "keywords": [
     "react"
   ],
-  "version": "19.1.0",
+  "version": "19.1.1",
   "homepage": "https://react.dev/",
   "bugs": "https://github.com/facebook/react/issues",
   "license": "MIT",

packages/react/src/jsx/ReactJSXElement.js

@@ -66,7 +66,7 @@ function UnknownOwner() {
   return (() => Error('react-stack-top-frame'))();
 }
 const createFakeCallStack = {
-  'react-stack-bottom-frame': function (callStackForError) {
+  react_stack_bottom_frame: function (callStackForError) {
     return callStackForError();
   },
 };
@@ -81,7 +81,7 @@ if (__DEV__) {
   didWarnAboutElementRef = {};
 
   // We use this technique to trick minifiers to preserve the function name.
-  unknownOwnerDebugStack = createFakeCallStack['react-stack-bottom-frame'].bind(
+  unknownOwnerDebugStack = createFakeCallStack.react_stack_bottom_frame.bind(
     createFakeCallStack,
     UnknownOwner,
   )();

packages/scheduler/package.json

@@ -1,6 +1,6 @@
 {
   "name": "scheduler",
-  "version": "0.25.0",
+  "version": "0.26.0",
   "description": "Cooperative scheduler for the browser environment.",
   "repository": {
     "type": "git",
@@ -24,4 +24,4 @@
     "unstable_post_task.js",
     "cjs/"
   ]
-}
+}

packages/shared/ReactFeatureFlags.js

@@ -96,11 +96,6 @@ export const enableSwipeTransition = __EXPERIMENTAL__;
 
 export const enableScrollEndPolyfill = __EXPERIMENTAL__;
 
-/**
- * Switches the Fabric API from doing layout in commit work instead of complete work.
- */
-export const enableFabricCompleteRootInCommitPhase = false;
-
 /**
  * Switches Fiber creation to a simple object instead of a constructor.
  */
@@ -140,6 +135,8 @@ export const enableShallowPropDiffing = false;
 
 export const enableSiblingPrerendering = true;
 
+export const enableEagerAlternateStateNodeCleanup = true;
+
 /**
  * Enables an expiration time for retry lanes to avoid starvation.
  */

packages/shared/ReactOwnerStackFrames.js

@@ -24,7 +24,7 @@ export function formatOwnerStack(error: Error): string {
     // Pop the JSX frame.
     stack = stack.slice(idx + 1);
   }
-  idx = stack.indexOf('react-stack-bottom-frame');
+  idx = stack.indexOf('react_stack_bottom_frame');
   if (idx !== -1) {
     idx = stack.lastIndexOf('\n', idx);
   }

packages/shared/ReactVersion.js

@@ -12,4 +12,4 @@
 // TODO: This module is used both by the release scripts and to expose a version
 // at runtime. We should instead inject the version number as part of the build
 // process, and use the ReactVersions.js module as the single source of truth.
-export default '19.1.0';
+export default '19.1.1';

packages/shared/forks/ReactFeatureFlags.native-fb-dynamic.js

@@ -22,8 +22,8 @@ export const enableObjectFiber = __VARIANT__;
 export const enableHiddenSubtreeInsertionEffectCleanup = __VARIANT__;
 export const enablePersistedModeClonedFlag = __VARIANT__;
 export const enableShallowPropDiffing = __VARIANT__;
+export const enableEagerAlternateStateNodeCleanup = __VARIANT__;
 export const passChildrenWhenCloningPersistedNodes = __VARIANT__;
-export const enableFabricCompleteRootInCommitPhase = __VARIANT__;
 export const enableSiblingPrerendering = __VARIANT__;
 export const enableUseEffectCRUDOverload = __VARIANT__;
 export const enableFastAddPropertiesInDiffing = __VARIANT__;

packages/shared/forks/ReactFeatureFlags.native-fb.js

@@ -20,12 +20,12 @@ const dynamicFlags: DynamicExportsType = (dynamicFlagsUntyped: any);
 // the exports object every time a flag is read.
 export const {
   alwaysThrottleRetries,
-  enableFabricCompleteRootInCommitPhase,
   enableHiddenSubtreeInsertionEffectCleanup,
   enableObjectFiber,
   enablePersistedModeClonedFlag,
   enableShallowPropDiffing,
   enableUseEffectCRUDOverload,
+  enableEagerAlternateStateNodeCleanup,
   passChildrenWhenCloningPersistedNodes,
   enableSiblingPrerendering,
   enableFastAddPropertiesInDiffing,

packages/shared/forks/ReactFeatureFlags.native-oss.js

@@ -30,7 +30,6 @@ export const enableAsyncIterableChildren = false;
 export const enableCPUSuspense = false;
 export const enableCreateEventHandleAPI = false;
 export const enableDO_NOT_USE_disableStrictPassiveEffect = false;
-export const enableFabricCompleteRootInCommitPhase = false;
 export const enableMoveBefore = true;
 export const enableFizzExternalRuntime = true;
 export const enableHalt = false;
@@ -50,6 +49,7 @@ export const enableSchedulingProfiler = __PROFILE__;
 export const enableComponentPerformanceTrack = false;
 export const enableScopeAPI = false;
 export const enableShallowPropDiffing = false;
+export const enableEagerAlternateStateNodeCleanup = true;
 export const enableSuspenseAvoidThisFallback = false;
 export const enableSuspenseCallback = false;
 export const enableTaint = true;

packages/shared/forks/ReactFeatureFlags.test-renderer.js

@@ -36,7 +36,6 @@ export const enableUseEffectEventHook = false;
 export const favorSafetyOverHydrationPerf = true;
 export const enableLegacyFBSupport = false;
 export const enableMoveBefore = false;
-export const enableFabricCompleteRootInCommitPhase = false;
 export const enableHiddenSubtreeInsertionEffectCleanup = false;
 export const enableHydrationLaneScheduling = true;
 
@@ -66,6 +65,7 @@ export const enableShallowPropDiffing = false;
 export const enableSiblingPrerendering = true;
 
 export const enableUseEffectCRUDOverload = false;
+export const enableEagerAlternateStateNodeCleanup = true;
 
 export const enableYieldingBeforePassive = true;
 

packages/shared/forks/ReactFeatureFlags.test-renderer.native-fb.js

@@ -47,6 +47,7 @@ export const enableSchedulingProfiler = __PROFILE__;
 export const enableComponentPerformanceTrack = false;
 export const enableScopeAPI = false;
 export const enableShallowPropDiffing = false;
+export const enableEagerAlternateStateNodeCleanup = true;
 export const enableSuspenseAvoidThisFallback = false;
 export const enableSuspenseCallback = false;
 export const enableTaint = true;
@@ -60,7 +61,6 @@ export const renameElementSymbol = false;
 export const retryLaneExpirationMs = 5000;
 export const syncLaneExpirationMs = 250;
 export const transitionLaneExpirationMs = 5000;
-export const enableFabricCompleteRootInCommitPhase = false;
 export const enableSiblingPrerendering = true;
 export const enableUseEffectCRUDOverload = true;
 export const enableHydrationLaneScheduling = true;

packages/shared/forks/ReactFeatureFlags.test-renderer.www.js

@@ -39,7 +39,6 @@ export const favorSafetyOverHydrationPerf = true;
 export const enableLegacyFBSupport = false;
 export const enableMoveBefore = false;
 export const enableRenderableContext = false;
-export const enableFabricCompleteRootInCommitPhase = false;
 export const enableHiddenSubtreeInsertionEffectCleanup = true;
 
 export const enableRetryLaneExpiration = false;
@@ -75,6 +74,7 @@ export const enableShallowPropDiffing = false;
 export const enableSiblingPrerendering = true;
 
 export const enableUseEffectCRUDOverload = false;
+export const enableEagerAlternateStateNodeCleanup = true;
 
 export const enableHydrationLaneScheduling = true;
 

packages/shared/forks/ReactFeatureFlags.www.js

@@ -50,7 +50,6 @@ export const enableProfilerTimer = __PROFILE__;
 export const enableProfilerCommitHooks = __PROFILE__;
 export const enableProfilerNestedUpdatePhase = __PROFILE__;
 export const enableUpdaterTracking = __PROFILE__;
-export const enableFabricCompleteRootInCommitPhase = false;
 
 export const enableSuspenseAvoidThisFallback = true;
 
@@ -111,6 +110,8 @@ export const disableLegacyMode = true;
 
 export const enableShallowPropDiffing = false;
 
+export const enableEagerAlternateStateNodeCleanup = true;
+
 export const enableLazyPublicInstanceInFabric = false;
 
 export const enableSwipeTransition = false;

packages/use-subscription/package.json

@@ -21,6 +21,6 @@
     "rxjs": "^5.5.6"
   },
   "dependencies": {
-    "use-sync-external-store": "^1.4.0"
+    "use-sync-external-store": "^1.5.0"
   }
 }

scripts/rollup/build-all-release-channels.js

@@ -221,8 +221,7 @@ function processStable(buildDir) {
       );
     }
 
-    const rnVersionString =
-      ReactVersion + '-native-fb-' + sha + '-' + dateString;
+    const rnVersionString = ReactVersion + '-native-fb-' + sha + '-' + dateString;
     if (fs.existsSync(buildDir + '/facebook-react-native')) {
       updatePlaceholderReactVersionInCompiledArtifacts(
         buildDir + '/facebook-react-native',
@@ -231,9 +230,16 @@ function processStable(buildDir) {
     }
 
     if (fs.existsSync(buildDir + '/react-native')) {
-      updatePlaceholderReactVersionInCompiledArtifactsFb(
+      updatePlaceholderReactVersionInCompiledArtifacts(
         buildDir + '/react-native',
-        rnVersionString
+        rnVersionString,
+        (filename) => filename.endsWith('.fb.js')
+      );
+
+      updatePlaceholderReactVersionInCompiledArtifacts(
+        buildDir + '/react-native',
+        ReactVersion,
+        (filename) => !filename.endsWith('.fb.js') && filename.endsWith('.js')
       );
     }
 
@@ -340,9 +346,16 @@ function processExperimental(buildDir, version) {
   }
 
   if (fs.existsSync(buildDir + '/react-native')) {
-    updatePlaceholderReactVersionInCompiledArtifactsFb(
+    updatePlaceholderReactVersionInCompiledArtifacts(
       buildDir + '/react-native',
-      rnVersionString
+      rnVersionString,
+      (filename) => filename.endsWith('.fb.js')
+    );
+
+    updatePlaceholderReactVersionInCompiledArtifacts(
+      buildDir + '/react-native',
+      ReactVersion,
+      (filename) => !filename.endsWith('.fb.js') && filename.endsWith('.js')
     );
   }
 
@@ -437,10 +450,15 @@ function updatePackageVersions(
 
 function updatePlaceholderReactVersionInCompiledArtifacts(
   artifactsDirectory,
-  newVersion
+  newVersion,
+  filteringClosure
 ) {
   // Update the version of React in the compiled artifacts by searching for
   // the placeholder string and replacing it with a new one.
+  if (filteringClosure == null) {
+    filteringClosure = filename => filename.endsWith('.js')
+  }
+
   const artifactFilenames = String(
     spawnSync('grep', [
       '-lr',
@@ -451,7 +469,7 @@ function updatePlaceholderReactVersionInCompiledArtifacts(
   )
     .trim()
     .split('\n')
-    .filter(filename => filename.endsWith('.js'));
+    .filter(filteringClosure);
 
   for (const artifactFilename of artifactFilenames) {
     const originalText = fs.readFileSync(artifactFilename, 'utf8');
@@ -463,33 +481,6 @@ function updatePlaceholderReactVersionInCompiledArtifacts(
   }
 }
 
-function updatePlaceholderReactVersionInCompiledArtifactsFb(
-  artifactsDirectory,
-  newVersion
-) {
-  // Update the version of React in the compiled artifacts by searching for
-  // the placeholder string and replacing it with a new one.
-  const artifactFilenames = String(
-    spawnSync('grep', [
-      '-lr',
-      PLACEHOLDER_REACT_VERSION,
-      '--',
-      artifactsDirectory,
-    ]).stdout
-  )
-    .trim()
-    .split('\n')
-    .filter(filename => filename.endsWith('.fb.js'));
-
-  for (const artifactFilename of artifactFilenames) {
-    const originalText = fs.readFileSync(artifactFilename, 'utf8');
-    const replacedText = originalText.replaceAll(
-      PLACEHOLDER_REACT_VERSION,
-      newVersion
-    );
-    fs.writeFileSync(artifactFilename, replacedText);
-  }
-}
 
 /**
  * cross-platform alternative to `rsync -ar`