Migrate RNTester to use {usesCleartextTraffic} Manifest Placeholder (#52620)

Summary:
This creates a `debugOptimized` build type for React Native Android, meaning that we can run C++ optimization on the debug build, while still having the debugger enabled. This is aimed at improving the developer experience for folks developing on low-end devices or emulators.

Users that intend to debug can still use the `debug` variant where the full debug symbols are shipped.

## Changelog:

[ANDROID] [ADDED] - Create a debugOptimized buildType for Android


Test Plan:
Tested locally with RNTester by doing:

```
./gradlew installDebugOptimized
```

This is the output of the 3 generated .aar. The size difference is a proof that we're correctly stripping out the C++ debug symbols:

<img width="193" height="54" alt="Screenshot 2025-07-15 at 17 49 50" src="https://github.com/user-attachments/assets/584a0e8d-2d17-40d4-ac29-da09049d6554" />
<img width="235" height="51" alt="Screenshot 2025-07-15 at 17 49 39" src="https://github.com/user-attachments/assets/eda8f9e7-3509-4334-8c16-990e55caa04d" />
<img width="184" height="52" alt="Screenshot 2025-07-15 at 17 49 32" src="https://github.com/user-attachments/assets/a5c94385-bc00-4484-b43e-088ee039827f" />

Rollback Plan:

Reviewed By: cipolleschi

Differential Revision: D78351347

Pulled By: cortinico

.github/actions/build-hermesc-windows/action.yml

@@ -14,23 +14,23 @@ runs:
       uses: actions/download-artifact@v4
       with:
         name: hermes-workspace
-        path: 'D:\tmp\hermes'
+        path: 'C:\tmp\hermes'
     - name: Set up workspace
       shell: powershell
       run: |
-        mkdir -p D:\tmp\hermes\osx-bin
+        mkdir -p C:\tmp\hermes\osx-bin
         mkdir -p .\packages\react-native\sdks\hermes
-        cp -r -Force D:\tmp\hermes\hermes\* .\packages\react-native\sdks\hermes\.
+        cp -r -Force C:\tmp\hermes\hermes\* .\packages\react-native\sdks\hermes\.
         cp -r -Force .\packages\react-native\sdks\hermes-engine\utils\* .\packages\react-native\sdks\hermes\.
     - name: Windows cache
       uses: actions/cache@v4
       with:
         key: v3-hermes-${{ github.job }}-windows-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}
         path: |
-          D:\tmp\hermes\win64-bin\
-          D:\tmp\hermes\hermes\icu\
-          D:\tmp\hermes\hermes\deps\
-          D:\tmp\hermes\hermes\build_release\
+          C:\tmp\hermes\win64-bin\
+          C:\tmp\hermes\hermes\icu\
+          C:\tmp\hermes\hermes\deps\
+          C:\tmp\hermes\hermes\build_release\
     - name: setup-msbuild
       uses: microsoft/setup-msbuild@v1.3.2
     - name: Set up workspace
@@ -83,4 +83,4 @@ runs:
       uses: actions/upload-artifact@v4.3.4
       with:
         name: hermes-win64-bin
-        path: D:\tmp\hermes\win64-bin\
+        path: C:\tmp\hermes\win64-bin\

.github/workflows/nightly.yml

@@ -128,9 +128,9 @@ jobs:
     runs-on: windows-2025
     needs: prepare_hermes_workspace
     env:
-      HERMES_WS_DIR: 'D:\tmp\hermes'
-      HERMES_TARBALL_ARTIFACTS_DIR: 'D:\tmp\hermes\hermes-runtime-darwin'
-      HERMES_OSXBIN_ARTIFACTS_DIR: 'D:\tmp\hermes\osx-bin'
+      HERMES_WS_DIR: 'C:\tmp\hermes'
+      HERMES_TARBALL_ARTIFACTS_DIR: 'C:\tmp\hermes\hermes-runtime-darwin'
+      HERMES_OSXBIN_ARTIFACTS_DIR: 'C:\tmp\hermes\osx-bin'
       ICU_URL: "https://github.com/unicode-org/icu/releases/download/release-64-2/icu4c-64_2-Win64-MSVC2017.zip"
       MSBUILD_DIR: 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin'
       CMAKE_DIR: 'C:\Program Files\CMake\bin'

.github/workflows/publish-release.yml

@@ -125,9 +125,9 @@ jobs:
     runs-on: windows-2025
     needs: prepare_hermes_workspace
     env:
-      HERMES_WS_DIR: 'D:\tmp\hermes'
-      HERMES_TARBALL_ARTIFACTS_DIR: 'D:\tmp\hermes\hermes-runtime-darwin'
-      HERMES_OSXBIN_ARTIFACTS_DIR: 'D:\tmp\hermes\osx-bin'
+      HERMES_WS_DIR: 'C:\tmp\hermes'
+      HERMES_TARBALL_ARTIFACTS_DIR: 'C:\tmp\hermes\hermes-runtime-darwin'
+      HERMES_OSXBIN_ARTIFACTS_DIR: 'C:\tmp\hermes\osx-bin'
       ICU_URL: "https://github.com/unicode-org/icu/releases/download/release-64-2/icu4c-64_2-Win64-MSVC2017.zip"
       MSBUILD_DIR: 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin'
       CMAKE_DIR: 'C:\Program Files\CMake\bin'

.github/workflows/test-all.yml

@@ -382,9 +382,9 @@ jobs:
     runs-on: windows-2025
     needs: prepare_hermes_workspace
     env:
-      HERMES_WS_DIR: 'D:\tmp\hermes'
-      HERMES_TARBALL_ARTIFACTS_DIR: 'D:\tmp\hermes\hermes-runtime-darwin'
-      HERMES_OSXBIN_ARTIFACTS_DIR: 'D:\tmp\hermes\osx-bin'
+      HERMES_WS_DIR: 'C:\tmp\hermes'
+      HERMES_TARBALL_ARTIFACTS_DIR: 'C:\tmp\hermes\hermes-runtime-darwin'
+      HERMES_OSXBIN_ARTIFACTS_DIR: 'C:\tmp\hermes\osx-bin'
       ICU_URL: "https://github.com/unicode-org/icu/releases/download/release-64-2/icu4c-64_2-Win64-MSVC2017.zip"
       MSBUILD_DIR: 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin'
       CMAKE_DIR: 'C:\Program Files\CMake\bin'
@@ -583,7 +583,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: ["24", "22"]
+        node-version: ["24", "22", "20"]
     steps:
       - name: Checkout
         uses: actions/checkout@v4

packages/assets/package.json

@@ -17,7 +17,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "files": [
     "path-support.js",

packages/babel-plugin-codegen/package.json

@@ -19,7 +19,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "files": [
     "index.js"

packages/community-cli-plugin/package.json

@@ -43,6 +43,6 @@
     }
   },
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   }
 }

packages/core-cli-utils/package.json

@@ -21,7 +21,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "files": [
     "dist"

packages/debugger-frontend/package.json

@@ -20,6 +20,6 @@
     "BUILD_INFO"
   ],
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   }
 }

packages/debugger-shell/package.json

@@ -26,7 +26,7 @@
   },
   "license": "MIT",
   "engines": {
-    "node": ">= 22.14.0",
+    "node": ">= 20.19.4",
     "electron": ">=36.3.0"
   },
   "dependencies": {

packages/debugger-shell/src/electron/index.flow.js

@@ -10,9 +10,25 @@
 
 // $FlowFixMe[unclear-type] We have no Flow types for the Electron API.
 const {app} = require('electron') as any;
+const util = require('util');
+
+// Handle global command line arguments which don't require a window
+// or the single instance lock to be held.
+const {
+  values: {version = false},
+} = util.parseArgs({
+  options: {version: {type: 'boolean'}},
+  args: process.argv.slice(app.isPackaged ? 1 : 2),
+  strict: false,
+});
+if (version) {
+  console.log(`${app.getName()} v${app.getVersion()}`);
+  // Not app.quit() - we want to exit immediately without initialising the graphical subsystem.
+  app.exit(0);
+}
 
 const gotTheLock = app.requestSingleInstanceLock({
-  argv: process.argv.slice(2),
+  argv: process.argv.slice(app.isPackaged ? 1 : 2),
 });
 
 if (!gotTheLock) {

packages/dev-middleware/package.json

@@ -35,7 +35,7 @@
     "ws": "^6.2.3"
   },
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "devDependencies": {
     "selfsigned": "^2.4.1",

packages/eslint-config-react-native/package.json

@@ -16,7 +16,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "main": "index.js",
   "dependencies": {

packages/eslint-plugin-react-native/package.json

@@ -22,6 +22,6 @@
     "hermes-eslint": "0.29.1"
   },
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   }
 }

packages/eslint-plugin-specs/package.json

@@ -36,6 +36,6 @@
     "hermes-eslint": "0.29.1"
   },
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   }
 }

packages/gradle-plugin/package.json

@@ -16,7 +16,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "scripts": {
     "build": "./gradlew build",

packages/gradle-plugin/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/ReactPlugin.kt

@@ -18,6 +18,7 @@ import com.facebook.react.tasks.GenerateEntryPointTask
 import com.facebook.react.tasks.GeneratePackageListTask
 import com.facebook.react.utils.AgpConfiguratorUtils.configureBuildConfigFieldsForApp
 import com.facebook.react.utils.AgpConfiguratorUtils.configureBuildConfigFieldsForLibraries
+import com.facebook.react.utils.AgpConfiguratorUtils.configureBuildTypesForApp
 import com.facebook.react.utils.AgpConfiguratorUtils.configureDevServerLocation
 import com.facebook.react.utils.AgpConfiguratorUtils.configureNamespaceForLibraries
 import com.facebook.react.utils.BackwardCompatUtils.configureBackwardCompatibilityReactMap
@@ -84,6 +85,7 @@ class ReactPlugin : Plugin<Project> {
       configureAutolinking(project, extension)
       configureCodegen(project, extension, rootExtension, isLibrary = false)
       configureResources(project, extension)
+      configureBuildTypesForApp(project)
     }
 
     // Library Only Configuration

packages/gradle-plugin/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/utils/AgpConfiguratorUtils.kt

@@ -19,6 +19,7 @@ import java.net.Inet4Address
 import java.net.NetworkInterface
 import javax.xml.parsers.DocumentBuilder
 import javax.xml.parsers.DocumentBuilderFactory
+import kotlin.plus
 import org.gradle.api.Action
 import org.gradle.api.Project
 import org.gradle.api.plugins.AppliedPlugin
@@ -27,6 +28,26 @@ import org.w3c.dom.Element
 @Suppress("UnstableApiUsage")
 internal object AgpConfiguratorUtils {
 
+  fun configureBuildTypesForApp(project: Project) {
+    val action =
+        Action<AppliedPlugin> {
+          project.extensions
+              .getByType(ApplicationAndroidComponentsExtension::class.java)
+              .finalizeDsl { ext ->
+                ext.buildTypes {
+                  val debug =
+                      getByName("debug").apply {
+                        manifestPlaceholders["usesCleartextTraffic"] = "true"
+                      }
+                  getByName("release").apply {
+                    manifestPlaceholders["usesCleartextTraffic"] = "false"
+                  }
+                }
+              }
+        }
+    project.pluginManager.withPlugin("com.android.application", action)
+  }
+
   fun configureBuildConfigFieldsForApp(project: Project, extension: ReactExtension) {
     val action =
         Action<AppliedPlugin> {

packages/metro-config/package.json

@@ -16,7 +16,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "exports": {
     ".": "./src/index.js",

packages/new-app-screen/package.json

@@ -30,6 +30,6 @@
     }
   },
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   }
 }

packages/polyfills/__tests__/consoleTimeStamp-itest.js

@@ -16,6 +16,7 @@ describe('console.timeStamp()', () => {
   });
 
   it("doesn't throw when label is not specified", () => {
+    // $FlowExpectedError[incompatible-call] not passing label intentionally
     expect(() => console.timeStamp()).not.toThrow();
   });
 
@@ -25,7 +26,6 @@ describe('console.timeStamp()', () => {
 
   it("doesn't throw when additional arguments are specified", () => {
     expect(() =>
-      // $FlowExpectedError[extra-arg]
       console.timeStamp('label', 100, 500, 'Track', 'Group', 'error'),
     ).not.toThrow();
   });
@@ -34,7 +34,7 @@ describe('console.timeStamp()', () => {
     // $FlowExpectedError[incompatible-call]
     expect(() => console.timeStamp({})).not.toThrow();
     expect(() =>
-      // $FlowExpectedError[extra-arg]
+      // $FlowExpectedError[incompatible-call]
       console.timeStamp('label', true, null, {}, [], () => {}),
     ).not.toThrow();
   });

packages/polyfills/console.js

@@ -569,10 +569,7 @@ function consoleAssertPolyfill(expression, label) {
   }
 }
 
-// https://developer.mozilla.org/en-US/docs/Web/API/console/timeStamp_static.
-// Non-standard API for recording markers on a timeline of the Performance instrumentation.
-// The actual logging is not provided by definition.
-function consoleTimeStampPolyfill() {}
+function stub() {}
 
 if (global.nativeLoggingHook) {
   const originalConsole = global.console;
@@ -585,7 +582,11 @@ if (global.nativeLoggingHook) {
   }
 
   global.console = {
-    timeStamp: consoleTimeStampPolyfill,
+    time: stub,
+    timeEnd: stub,
+    timeStamp: stub,
+    count: stub,
+    countReset: stub,
     ...(originalConsole ?? {}),
     error: getNativeLogFunction(LOG_LEVELS.error),
     info: getNativeLogFunction(LOG_LEVELS.info),
@@ -676,7 +677,6 @@ if (global.nativeLoggingHook) {
     });
   }
 } else if (!global.console) {
-  function stub() {}
   const log = global.print || stub;
 
   global.console = {
@@ -692,6 +692,8 @@ if (global.nativeLoggingHook) {
       }
     },
     clear: stub,
+    count: stub,
+    countReset: stub,
     dir: stub,
     dirxml: stub,
     group: stub,
@@ -700,6 +702,8 @@ if (global.nativeLoggingHook) {
     profile: stub,
     profileEnd: stub,
     table: stub,
+    time: stub,
+    timeEnd: stub,
     timeStamp: stub,
   };
 

packages/polyfills/package.json

@@ -18,7 +18,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "files": [
     "console.js",

packages/react-native-babel-preset/package.json

@@ -13,7 +13,7 @@
   ],
   "license": "MIT",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "main": "src/index.js",
   "files": [

packages/react-native-babel-preset/src/configs/main.js

@@ -38,19 +38,6 @@ function isFirstParty(fileName) {
 // use `this.foo = bar` instead of `this.defineProperty('foo', ...)`
 const loose = true;
 
-const defaultPlugins = [
-  [require('babel-plugin-syntax-hermes-parser'), {parseLangTypes: 'flow'}],
-  [require('babel-plugin-transform-flow-enums')],
-  [require('@babel/plugin-transform-block-scoping')],
-  [require('@babel/plugin-transform-class-properties'), {loose}],
-  [require('@babel/plugin-transform-private-methods'), {loose}],
-  [require('@babel/plugin-transform-private-property-in-object'), {loose}],
-  [require('@babel/plugin-syntax-dynamic-import')],
-  [require('@babel/plugin-syntax-export-default-from')],
-  ...passthroughSyntaxPlugins,
-  [require('@babel/plugin-transform-unicode-regex')],
-];
-
 // For Static Hermes testing (experimental), the hermes-canary transformProfile
 // is used to enable regenerator (and some related lowering passes) because SH
 // requires more Babel lowering than Hermes temporarily.
@@ -234,7 +221,28 @@ const getPreset = (src, options) => {
         plugins: [require('@babel/plugin-transform-flow-strip-types')],
       },
       {
-        plugins: defaultPlugins,
+        plugins: [
+          [
+            require('babel-plugin-syntax-hermes-parser'),
+            {
+              parseLangTypes: 'flow',
+              reactRuntimeTarget: '19',
+              ...options.hermesParserOptions,
+            },
+          ],
+          [require('babel-plugin-transform-flow-enums')],
+          [require('@babel/plugin-transform-block-scoping')],
+          [require('@babel/plugin-transform-class-properties'), {loose}],
+          [require('@babel/plugin-transform-private-methods'), {loose}],
+          [
+            require('@babel/plugin-transform-private-property-in-object'),
+            {loose},
+          ],
+          [require('@babel/plugin-syntax-dynamic-import')],
+          [require('@babel/plugin-syntax-export-default-from')],
+          ...passthroughSyntaxPlugins,
+          [require('@babel/plugin-transform-unicode-regex')],
+        ],
       },
       {
         test: isTypeScriptSource,

packages/react-native-babel-transformer/package.json

@@ -14,7 +14,7 @@
   ],
   "license": "MIT",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "main": "src/index.js",
   "files": [

packages/react-native-codegen/package.json

@@ -18,7 +18,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "scripts": {
     "build": "yarn clean && node scripts/build.js --verbose",

packages/react-native-compatibility-check/package.json

@@ -19,7 +19,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "exports": {
     ".": "./src/index.js",

packages/react-native/Libraries/Animated/__tests__/Animated-test.js

@@ -31,12 +31,8 @@ function mockQueueMicrotask() {
 }
 
 describe('Animated', () => {
-  let ReactNativeFeatureFlags;
-
   beforeEach(() => {
     jest.resetModules();
-
-    ReactNativeFeatureFlags = require('../../../src/private/featureflags/ReactNativeFeatureFlags');
   });
 
   mockQueueMicrotask();
@@ -113,50 +109,7 @@ describe('Animated', () => {
       expect(callback.mock.calls.length).toBe(1);
     });
 
-    it('does not detach on updates', async () => {
-      ReactNativeFeatureFlags.override({
-        scheduleAnimatedCleanupInMicrotask: () => false,
-      });
-
-      const opacity = new Animated.Value(0);
-      jest.spyOn(opacity, '__detach');
-
-      const root = await create(<Animated.View style={{opacity}} />);
-      expect(opacity.__detach).not.toBeCalled();
-
-      await update(root, <Animated.View style={{opacity}} />);
-      expect(opacity.__detach).not.toBeCalled();
-
-      await unmount(root);
-      expect(opacity.__detach).toBeCalled();
-    });
-
-    it('stops animation when detached', async () => {
-      ReactNativeFeatureFlags.override({
-        scheduleAnimatedCleanupInMicrotask: () => false,
-      });
-
-      const opacity = new Animated.Value(0);
-      const callback = jest.fn();
-
-      const root = await create(<Animated.View style={{opacity}} />);
-
-      Animated.timing(opacity, {
-        toValue: 10,
-        duration: 1000,
-        useNativeDriver: false,
-      }).start(callback);
-
-      await unmount(root);
-
-      expect(callback).toBeCalledWith({finished: false});
-    });
-
     it('detaches only on unmount (in a microtask)', async () => {
-      ReactNativeFeatureFlags.override({
-        scheduleAnimatedCleanupInMicrotask: () => true,
-      });
-
       const opacity = new Animated.Value(0);
       jest.spyOn(opacity, '__detach');
 
@@ -175,10 +128,6 @@ describe('Animated', () => {
     });
 
     it('restores default values only on update (in a microtask)', async () => {
-      ReactNativeFeatureFlags.override({
-        scheduleAnimatedCleanupInMicrotask: () => true,
-      });
-
       const __restoreDefaultValues = jest.spyOn(
         AnimatedProps.prototype,
         '__restoreDefaultValues',
@@ -213,10 +162,6 @@ describe('Animated', () => {
     });
 
     it('stops animation when detached (in a microtask)', async () => {
-      ReactNativeFeatureFlags.override({
-        scheduleAnimatedCleanupInMicrotask: () => true,
-      });
-
       const opacity = new Animated.Value(0);
       const callback = jest.fn();
 

packages/react-native/Libraries/Core/__tests__/ReactNativeVersionCheck-test.js

@@ -49,6 +49,7 @@ function _defineCheckVersionTests() {
     // $FlowFixMe[cannot-write]
     console.error = jest.fn();
     // $FlowFixMe[cannot-write]
+    // $FlowFixMe[unsafe-addition]
     global.console = {error: jest.fn(error => (consoleOutput += error))};
     spyOnConsoleError = jest.spyOn(global.console, 'error');
   });

packages/react-native/Libraries/Core/setUpPerformance.js

@@ -8,12 +8,13 @@
  * @format
  */
 
-import Performance from '../../src/private/webapis/performance/Performance';
 import NativePerformance from '../../src/private/webapis/performance/specs/NativePerformance';
 
 // In case if the native implementation of the Performance API is available, use it,
 // otherwise fall back to the legacy/default one, which only defines 'Performance.now()'
 if (NativePerformance) {
+  const Performance =
+    require('../../src/private/webapis/performance/Performance').default;
   // $FlowExpectedError[cannot-write]
   global.performance = new Performance();
 } else {

packages/react-native/Libraries/Interaction/InteractionManager.js

@@ -4,180 +4,32 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow strict-local
+ * @flow strict
  * @format
  */
 
 import type {EventSubscription} from '../vendor/emitter/EventEmitter';
-import type {Task} from './TaskQueue';
 
-import * as ReactNativeFeatureFlags from '../../src/private/featureflags/ReactNativeFeatureFlags';
-import EventEmitter from '../vendor/emitter/EventEmitter';
-
-const BatchedBridge = require('../BatchedBridge/BatchedBridge').default;
-const TaskQueue = require('./TaskQueue').default;
 const invariant = require('invariant');
 
-export type {Task, SimpleTask, PromiseTask} from './TaskQueue';
+export type SimpleTask = {
+  name: string,
+  run: () => void,
+};
+export type PromiseTask = {
+  name: string,
+  gen: () => Promise<void>,
+};
+export type Task = SimpleTask | PromiseTask | (() => void);
 
 export type Handle = number;
 
-const _emitter = new EventEmitter<{
-  interactionComplete: [],
-  interactionStart: [],
-}>();
-
-const DEBUG_DELAY: 0 = 0;
-const DEBUG: false = false;
-
-const InteractionManagerImpl = {
-  Events: {
-    interactionStart: 'interactionStart',
-    interactionComplete: 'interactionComplete',
-  },
-
-  /**
-   * Schedule a function to run after all interactions have completed. Returns a cancellable
-   * "promise".
-   */
-  runAfterInteractions(task: ?Task): {
-    then: <U>(
-      onFulfill?: ?(void) => ?(Promise<U> | U),
-      onReject?: ?(error: mixed) => ?(Promise<U> | U),
-    ) => Promise<U>,
-    cancel: () => void,
-    ...
-  } {
-    const tasks: Array<Task> = [];
-    const promise = new Promise((resolve: () => void) => {
-      _scheduleUpdate();
-      if (task) {
-        tasks.push(task);
-      }
-      tasks.push({
-        run: resolve,
-        name: 'resolve ' + ((task && task.name) || '?'),
-      });
-      _taskQueue.enqueueTasks(tasks);
-    });
-    return {
-      // $FlowFixMe[method-unbinding] added when improving typing for this parameters
-      then: promise.then.bind(promise),
-      cancel: function () {
-        _taskQueue.cancelTasks(tasks);
-      },
-    };
-  },
-
-  /**
-   * Notify manager that an interaction has started.
-   */
-  createInteractionHandle(): Handle {
-    /* $FlowFixMe[constant-condition] Error discovered during Constant
-     * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-    DEBUG && console.log('InteractionManager: create interaction handle');
-    _scheduleUpdate();
-    const handle = ++_inc;
-    _addInteractionSet.add(handle);
-    return handle;
-  },
-
-  /**
-   * Notify manager that an interaction has completed.
-   */
-  clearInteractionHandle(handle: Handle) {
-    /* $FlowFixMe[constant-condition] Error discovered during Constant
-     * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-    DEBUG && console.log('InteractionManager: clear interaction handle');
-    invariant(!!handle, 'InteractionManager: Must provide a handle to clear.');
-    _scheduleUpdate();
-    _addInteractionSet.delete(handle);
-    _deleteInteractionSet.add(handle);
-  },
-
-  // $FlowFixMe[unclear-type] unclear type of _emitter
-  // $FlowFixMe[method-unbinding] added when improving typing for this parameters
-  addListener: _emitter.addListener.bind(_emitter) as (
-    eventType: string,
-    // $FlowFixMe[unclear-type] unclear type of arguments
-    listener: (...args: any) => mixed,
-    context: mixed,
-  ) => EventSubscription,
-
-  /**
-   * A positive number will use setTimeout to schedule any tasks after the
-   * eventLoopRunningTime hits the deadline value, otherwise all tasks will be
-   * executed in one setImmediate batch (default).
-   */
-  setDeadline(deadline: number) {
-    _deadline = deadline;
-  },
-};
-
-const _interactionSet = new Set<number | Handle>();
-const _addInteractionSet = new Set<number | Handle>();
-const _deleteInteractionSet = new Set<Handle>();
-const _taskQueue = new TaskQueue({onMoreTasks: _scheduleUpdate});
-let _nextUpdateHandle: $FlowFixMe | TimeoutID = 0;
-let _inc = 0;
-let _deadline = -1;
-
-/**
- * Schedule an asynchronous update to the interaction state.
- */
-function _scheduleUpdate() {
-  if (!_nextUpdateHandle) {
-    if (_deadline > 0) {
-      _nextUpdateHandle = setTimeout(_processUpdate, 0 + DEBUG_DELAY);
-    } else {
-      _nextUpdateHandle = setImmediate(_processUpdate);
-    }
-  }
-}
-
-/**
- * Notify listeners, process queue, etc
- */
-function _processUpdate() {
-  _nextUpdateHandle = 0;
-
-  const interactionCount = _interactionSet.size;
-  _addInteractionSet.forEach(handle => _interactionSet.add(handle));
-  _deleteInteractionSet.forEach(handle => _interactionSet.delete(handle));
-  const nextInteractionCount = _interactionSet.size;
-
-  if (interactionCount !== 0 && nextInteractionCount === 0) {
-    // transition from 1+ --> 0 interactions
-    /* $FlowFixMe[prop-missing] Natural Inference rollout. See
-     * https://fburl.com/workplace/6291gfvu */
-    /* $FlowFixMe[invalid-computed-prop] Natural Inference rollout. See
-     * https://fburl.com/workplace/6291gfvu */
-    _emitter.emit(InteractionManager.Events.interactionComplete);
-  } else if (interactionCount === 0 && nextInteractionCount !== 0) {
-    // transition from 0 --> 1+ interactions
-    /* $FlowFixMe[prop-missing] Natural Inference rollout. See
-     * https://fburl.com/workplace/6291gfvu */
-    /* $FlowFixMe[invalid-computed-prop] Natural Inference rollout. See
-     * https://fburl.com/workplace/6291gfvu */
-    _emitter.emit(InteractionManager.Events.interactionStart);
-  }
-
-  // process the queue regardless of a transition
-  if (nextInteractionCount === 0) {
-    while (_taskQueue.hasTasksToProcess()) {
-      _taskQueue.processNext();
-      if (
-        _deadline > 0 &&
-        BatchedBridge.getEventLoopRunningTime() >= _deadline
-      ) {
-        // Hit deadline before processing all tasks, so process more later.
-        _scheduleUpdate();
-        break;
-      }
-    }
-  }
-  _addInteractionSet.clear();
-  _deleteInteractionSet.clear();
+// NOTE: The original implementation of `InteractionManager` never rejected
+// the returned promise. This preserves that behavior in the stub.
+function reject(error: Error): void {
+  setTimeout(() => {
+    throw error;
+  }, 0);
 }
 
 /**
@@ -231,11 +83,106 @@ function _processUpdate() {
  *
  * @deprecated
  */
-const InteractionManager = (
-  ReactNativeFeatureFlags.disableInteractionManager()
-    ? // $FlowFixMe[incompatible-variance]
-      require('./InteractionManagerStub').default
-    : InteractionManagerImpl
-) as typeof InteractionManagerImpl;
+const InteractionManagerStub = {
+  Events: {
+    interactionStart: 'interactionStart',
+    interactionComplete: 'interactionComplete',
+  },
 
-export default InteractionManager;
+  /**
+   * Schedule a function to run after all interactions have completed. Returns a cancellable
+   * "promise".
+   *
+   * @deprecated
+   */
+  runAfterInteractions(task: ?Task): {
+    then: <U>(
+      onFulfill?: ?(void) => ?(Promise<U> | U),
+      onReject?: ?(error: mixed) => ?(Promise<U> | U),
+    ) => Promise<U>,
+    cancel: () => void,
+    ...
+  } {
+    let immediateID: ?$FlowIssue;
+    const promise = new Promise(resolve => {
+      immediateID = setImmediate(() => {
+        if (typeof task === 'object' && task !== null) {
+          if (typeof task.gen === 'function') {
+            task.gen().then(resolve, reject);
+          } else if (typeof task.run === 'function') {
+            try {
+              task.run();
+              resolve();
+            } catch (error) {
+              reject(error);
+            }
+          } else {
+            reject(new TypeError(`Task "${task.name}" missing gen or run.`));
+          }
+        } else if (typeof task === 'function') {
+          try {
+            task();
+            resolve();
+          } catch (error) {
+            reject(error);
+          }
+        } else {
+          reject(new TypeError('Invalid task of type: ' + typeof task));
+        }
+      });
+    });
+
+    return {
+      // $FlowFixMe[method-unbinding] added when improving typing for this parameters
+      then: promise.then.bind(promise),
+      cancel() {
+        clearImmediate(immediateID);
+      },
+    };
+  },
+
+  /**
+   * Notify manager that an interaction has started.
+   *
+   * @deprecated
+   */
+  createInteractionHandle(): Handle {
+    return -1;
+  },
+
+  /**
+   * Notify manager that an interaction has completed.
+   *
+   * @deprecated
+   */
+  clearInteractionHandle(handle: Handle) {
+    invariant(!!handle, 'InteractionManager: Must provide a handle to clear.');
+  },
+
+  /**
+   * @deprecated
+   */
+  addListener(
+    eventType: string,
+    // $FlowIgnore[unclear-type]
+    listener: (...args: any) => mixed,
+    context: mixed,
+  ): EventSubscription {
+    return {
+      remove() {},
+    };
+  },
+
+  /**
+   * A positive number will use setTimeout to schedule any tasks after the
+   * eventLoopRunningTime hits the deadline value, otherwise all tasks will be
+   * executed in one setImmediate batch (default).
+   *
+   * @deprecated
+   */
+  setDeadline(deadline: number) {
+    // Do nothing.
+  },
+};
+
+export default InteractionManagerStub;

packages/react-native/Libraries/Interaction/InteractionManagerStub.js

@@ -1,184 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow strict
- * @format
- */
-
-import type {EventSubscription} from '../vendor/emitter/EventEmitter';
-
-const invariant = require('invariant');
-
-export type Handle = number;
-
-type Task =
-  | {
-      name: string,
-      run: () => void,
-    }
-  | {
-      name: string,
-      gen: () => Promise<void>,
-    }
-  | (() => void);
-
-// NOTE: The original implementation of `InteractionManager` never rejected
-// the returned promise. This preserves that behavior in the stub.
-function reject(error: Error): void {
-  setTimeout(() => {
-    throw error;
-  }, 0);
-}
-
-/**
- * InteractionManager allows long-running work to be scheduled after any
- * interactions/animations have completed. In particular, this allows JavaScript
- * animations to run smoothly.
- *
- * Applications can schedule tasks to run after interactions with the following:
- *
- * ```
- * InteractionManager.runAfterInteractions(() => {
- *   // ...long-running synchronous task...
- * });
- * ```
- *
- * Compare this to other scheduling alternatives:
- *
- * - requestAnimationFrame(): for code that animates a view over time.
- * - setImmediate/setTimeout(): run code later, note this may delay animations.
- * - runAfterInteractions(): run code later, without delaying active animations.
- *
- * The touch handling system considers one or more active touches to be an
- * 'interaction' and will delay `runAfterInteractions()` callbacks until all
- * touches have ended or been cancelled.
- *
- * InteractionManager also allows applications to register animations by
- * creating an interaction 'handle' on animation start, and clearing it upon
- * completion:
- *
- * ```
- * var handle = InteractionManager.createInteractionHandle();
- * // run animation... (`runAfterInteractions` tasks are queued)
- * // later, on animation completion:
- * InteractionManager.clearInteractionHandle(handle);
- * // queued tasks run if all handles were cleared
- * ```
- *
- * `runAfterInteractions` takes either a plain callback function, or a
- * `PromiseTask` object with a `gen` method that returns a `Promise`.  If a
- * `PromiseTask` is supplied, then it is fully resolved (including asynchronous
- * dependencies that also schedule more tasks via `runAfterInteractions`) before
- * starting on the next task that might have been queued up synchronously
- * earlier.
- *
- * By default, queued tasks are executed together in a loop in one
- * `setImmediate` batch. If `setDeadline` is called with a positive number, then
- * tasks will only be executed until the deadline (in terms of js event loop run
- * time) approaches, at which point execution will yield via setTimeout,
- * allowing events such as touches to start interactions and block queued tasks
- * from executing, making apps more responsive.
- *
- * @deprecated
- */
-const InteractionManagerStub = {
-  Events: {
-    interactionStart: 'interactionStart',
-    interactionComplete: 'interactionComplete',
-  },
-
-  /**
-   * Schedule a function to run after all interactions have completed. Returns a cancellable
-   * "promise".
-   *
-   * @deprecated
-   */
-  runAfterInteractions(task: ?Task): {
-    then: <U>(
-      onFulfill?: ?(void) => ?(Promise<U> | U),
-      onReject?: ?(error: mixed) => ?(Promise<U> | U),
-    ) => Promise<U>,
-    cancel: () => void,
-    ...
-  } {
-    let immediateID: ?$FlowIssue;
-    const promise = new Promise(resolve => {
-      immediateID = setImmediate(() => {
-        if (typeof task === 'object' && task !== null) {
-          if (typeof task.gen === 'function') {
-            task.gen().then(resolve, reject);
-          } else if (typeof task.run === 'function') {
-            try {
-              task.run();
-              resolve();
-            } catch (error) {
-              reject(error);
-            }
-          } else {
-            reject(new TypeError(`Task "${task.name}" missing gen or run.`));
-          }
-        } else if (typeof task === 'function') {
-          try {
-            task();
-            resolve();
-          } catch (error) {
-            reject(error);
-          }
-        } else {
-          reject(new TypeError('Invalid task of type: ' + typeof task));
-        }
-      });
-    });
-
-    return {
-      // $FlowFixMe[method-unbinding] added when improving typing for this parameters
-      then: promise.then.bind(promise),
-      cancel() {
-        clearImmediate(immediateID);
-      },
-    };
-  },
-
-  /**
-   * Notify manager that an interaction has started.
-   *
-   * @deprecated
-   */
-  createInteractionHandle(): Handle {
-    return -1;
-  },
-
-  /**
-   * Notify manager that an interaction has completed.
-   *
-   * @deprecated
-   */
-  clearInteractionHandle(handle: Handle) {
-    invariant(!!handle, 'InteractionManager: Must provide a handle to clear.');
-  },
-
-  /**
-   * @deprecated
-   */
-  addListener(): EventSubscription {
-    return {
-      remove() {},
-    };
-  },
-
-  /**
-   * A positive number will use setTimeout to schedule any tasks after the
-   * eventLoopRunningTime hits the deadline value, otherwise all tasks will be
-   * executed in one setImmediate batch (default).
-   *
-   * @deprecated
-   */
-  setDeadline(deadline: number) {
-    // Do nothing.
-  },
-};
-
-export default InteractionManagerStub;

packages/react-native/Libraries/Interaction/TaskQueue.js

@@ -1,197 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow strict
- * @format
- */
-
-'use strict';
-
-const invariant = require('invariant');
-
-export type SimpleTask = {
-  name: string,
-  run: () => void,
-};
-export type PromiseTask = {
-  name: string,
-  gen: () => Promise<void>,
-};
-export type Task = SimpleTask | PromiseTask | (() => void);
-
-const DEBUG: false = false;
-
-/**
- * TaskQueue - A system for queueing and executing a mix of simple callbacks and
- * trees of dependent tasks based on Promises. No tasks are executed unless
- * `processNext` is called.
- *
- * `enqueue` takes a Task object with either a simple `run` callback, or a
- * `gen` function that returns a `Promise` and puts it in the queue.  If a gen
- * function is supplied, then the promise it returns will block execution of
- * tasks already in the queue until it resolves. This can be used to make sure
- * the first task is fully resolved (including asynchronous dependencies that
- * also schedule more tasks via `enqueue`) before starting on the next task.
- * The `onMoreTasks` constructor argument is used to inform the owner that an
- * async task has resolved and that the queue should be processed again.
- *
- * Note: Tasks are only actually executed with explicit calls to `processNext`.
- */
-class TaskQueue {
-  /**
-   * TaskQueue instances are self contained and independent, so multiple tasks
-   * of varying semantics and priority can operate together.
-   *
-   * `onMoreTasks` is invoked when `PromiseTask`s resolve if there are more
-   * tasks to process.
-   */
-  constructor({onMoreTasks}: {onMoreTasks: () => void, ...}) {
-    this._onMoreTasks = onMoreTasks;
-    this._queueStack = [{tasks: [], popable: false}];
-  }
-
-  /**
-   * Add a task to the queue.  It is recommended to name your tasks for easier
-   * async debugging. Tasks will not be executed until `processNext` is called
-   * explicitly.
-   */
-  enqueue(task: Task): void {
-    this._getCurrentQueue().push(task);
-  }
-
-  enqueueTasks(tasks: Array<Task>): void {
-    tasks.forEach(task => this.enqueue(task));
-  }
-
-  cancelTasks(tasksToCancel: Array<Task>): void {
-    // search through all tasks and remove them.
-    this._queueStack = this._queueStack
-      .map(queue => ({
-        ...queue,
-        tasks: queue.tasks.filter(task => tasksToCancel.indexOf(task) === -1),
-      }))
-      .filter((queue, idx) => queue.tasks.length > 0 || idx === 0);
-  }
-
-  /**
-   * Check to see if `processNext` should be called.
-   *
-   * @returns {boolean} Returns true if there are tasks that are ready to be
-   * processed with `processNext`, or returns false if there are no more tasks
-   * to be processed right now, although there may be tasks in the queue that
-   * are blocked by earlier `PromiseTask`s that haven't resolved yet.
-   * `onMoreTasks` will be called after each `PromiseTask` resolves if there are
-   * tasks ready to run at that point.
-   */
-  hasTasksToProcess(): boolean {
-    return this._getCurrentQueue().length > 0;
-  }
-
-  /**
-   * Executes the next task in the queue.
-   */
-  processNext(): void {
-    const queue = this._getCurrentQueue();
-    if (queue.length) {
-      const task = queue.shift();
-      try {
-        if (typeof task === 'object' && task.gen) {
-          /* $FlowFixMe[constant-condition] Error discovered during Constant
-           * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-          DEBUG && console.log('TaskQueue: genPromise for task ' + task.name);
-          this._genPromise(task);
-        } else if (typeof task === 'object' && task.run) {
-          /* $FlowFixMe[constant-condition] Error discovered during Constant
-           * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-          DEBUG && console.log('TaskQueue: run task ' + task.name);
-          task.run();
-        } else {
-          invariant(
-            typeof task === 'function',
-            'Expected Function, SimpleTask, or PromiseTask, but got:\n' +
-              JSON.stringify(task, null, 2),
-          );
-          /* $FlowFixMe[constant-condition] Error discovered during Constant
-           * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-          DEBUG && console.log('TaskQueue: run anonymous task');
-          task();
-        }
-      } catch (e) {
-        e.message =
-          // $FlowFixMe[incompatible-type]
-          // $FlowFixMe[incompatible-use]
-          'TaskQueue: Error with task ' + (task.name || '') + ': ' + e.message;
-        throw e;
-      }
-    }
-  }
-
-  _queueStack: Array<{
-    tasks: Array<Task>,
-    popable: boolean,
-    ...
-  }>;
-  _onMoreTasks: () => void;
-
-  _getCurrentQueue(): Array<Task> {
-    const stackIdx = this._queueStack.length - 1;
-    const queue = this._queueStack[stackIdx];
-    if (
-      queue.popable &&
-      queue.tasks.length === 0 &&
-      this._queueStack.length > 1
-    ) {
-      this._queueStack.pop();
-      /* $FlowFixMe[constant-condition] Error discovered during Constant
-       * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-      DEBUG &&
-        console.log('TaskQueue: popped queue: ', {
-          stackIdx,
-          queueStackSize: this._queueStack.length,
-        });
-      return this._getCurrentQueue();
-    } else {
-      return queue.tasks;
-    }
-  }
-
-  _genPromise(task: PromiseTask) {
-    // Each async task pushes it's own queue onto the queue stack. This
-    // effectively defers execution of previously queued tasks until the promise
-    // resolves, at which point we allow the new queue to be popped, which
-    // happens once it is fully processed.
-    this._queueStack.push({tasks: [], popable: false});
-    const stackIdx = this._queueStack.length - 1;
-    const stackItem = this._queueStack[stackIdx];
-    /* $FlowFixMe[constant-condition] Error discovered during Constant
-     * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-    DEBUG && console.log('TaskQueue: push new queue: ', {stackIdx});
-    /* $FlowFixMe[constant-condition] Error discovered during Constant
-     * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-    DEBUG && console.log('TaskQueue: exec gen task ' + task.name);
-    task
-      .gen()
-      .then(() => {
-        /* $FlowFixMe[constant-condition] Error discovered during Constant
-         * Condition roll out. See https://fburl.com/workplace/1v97vimq. */
-        DEBUG &&
-          console.log('TaskQueue: onThen for gen task ' + task.name, {
-            stackIdx,
-            queueStackSize: this._queueStack.length,
-          });
-        stackItem.popable = true;
-        this.hasTasksToProcess() && this._onMoreTasks();
-      })
-      .catch(ex => {
-        setTimeout(() => {
-          ex.message = `TaskQueue: Error resolving Promise in task ${task.name}: ${ex.message}`;
-          throw ex;
-        }, 0);
-      });
-  }
-}
-
-export default TaskQueue;

packages/react-native/Libraries/Interaction/__tests__/InteractionManager-test.js

@@ -1,342 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @noflow
- * @format
- */
-
-'use strict';
-
-import type {ReactNativeFeatureFlagsJsOnlyOverrides} from '../../../src/private/featureflags/ReactNativeFeatureFlags';
-
-function importModules(overrides: ReactNativeFeatureFlagsJsOnlyOverrides) {
-  const ReactNativeFeatureFlags = require('../../../src/private/featureflags/ReactNativeFeatureFlags');
-
-  // Make sure to setup overrides before importing any modules.
-  ReactNativeFeatureFlags.override(overrides);
-
-  const BatchedBridge = require('../../BatchedBridge/BatchedBridge').default;
-  const InteractionManager = require('../InteractionManager').default;
-
-  jest.mock('../../vendor/core/ErrorUtils');
-  jest.mock('../../BatchedBridge/BatchedBridge');
-
-  return {
-    BatchedBridge,
-    InteractionManager,
-  };
-}
-
-const isWindows = process.platform === 'win32';
-const itif = (condition: boolean) => (condition ? it : it.skip);
-
-function expectToBeCalledOnce(
-  fn: JestMockFn<$ReadOnlyArray<mixed>, mixed>,
-): void {
-  expect(fn.mock.calls.length).toBe(1);
-}
-
-describe('InteractionManager', () => {
-  let InteractionManager;
-  let interactionStart;
-  let interactionComplete;
-
-  beforeEach(() => {
-    jest.resetModules();
-    ({InteractionManager} = importModules({
-      disableInteractionManager: () => false,
-    }));
-
-    interactionStart = jest.fn();
-    interactionComplete = jest.fn();
-
-    InteractionManager.addListener(
-      InteractionManager.Events.interactionStart,
-      interactionStart,
-    );
-    InteractionManager.addListener(
-      InteractionManager.Events.interactionComplete,
-      interactionComplete,
-    );
-  });
-
-  it('throws when clearing an undefined handle', () => {
-    // $FlowExpectedError[incompatible-call]
-    expect(() => InteractionManager.clearInteractionHandle()).toThrow();
-  });
-
-  it('notifies asynchronously when interaction starts', () => {
-    InteractionManager.createInteractionHandle();
-    expect(interactionStart).not.toBeCalled();
-
-    jest.runAllTimers();
-    expect(interactionStart).toBeCalled();
-    expect(interactionComplete).not.toBeCalled();
-  });
-
-  it('notifies asynchronously when interaction stops', () => {
-    const handle = InteractionManager.createInteractionHandle();
-    jest.runAllTimers();
-    interactionStart.mockClear();
-    InteractionManager.clearInteractionHandle(handle);
-    expect(interactionComplete).not.toBeCalled();
-
-    jest.runAllTimers();
-    expect(interactionStart).not.toBeCalled();
-    expect(interactionComplete).toBeCalled();
-  });
-
-  it('does not notify when started & stopped in same event loop', () => {
-    const handle = InteractionManager.createInteractionHandle();
-    InteractionManager.clearInteractionHandle(handle);
-
-    jest.runAllTimers();
-    expect(interactionStart).not.toBeCalled();
-    expect(interactionComplete).not.toBeCalled();
-  });
-
-  it('does not notify when going from two -> one active interactions', () => {
-    InteractionManager.createInteractionHandle();
-    const handle = InteractionManager.createInteractionHandle();
-    jest.runAllTimers();
-
-    interactionStart.mockClear();
-    interactionComplete.mockClear();
-
-    InteractionManager.clearInteractionHandle(handle);
-    jest.runAllTimers();
-    expect(interactionStart).not.toBeCalled();
-    expect(interactionComplete).not.toBeCalled();
-  });
-
-  it('runs tasks asynchronously when there are interactions', () => {
-    const task = jest.fn();
-    InteractionManager.runAfterInteractions(task);
-    expect(task).not.toBeCalled();
-
-    jest.runAllTimers();
-    expect(task).toBeCalled();
-  });
-
-  it('runs tasks when interactions complete', () => {
-    const task = jest.fn();
-    const handle = InteractionManager.createInteractionHandle();
-    InteractionManager.runAfterInteractions(task);
-
-    jest.runAllTimers();
-    InteractionManager.clearInteractionHandle(handle);
-    expect(task).not.toBeCalled();
-
-    jest.runAllTimers();
-    expect(task).toBeCalled();
-  });
-
-  it('does not run tasks twice', () => {
-    const task1 = jest.fn();
-    const task2 = jest.fn();
-    InteractionManager.runAfterInteractions(task1);
-    jest.runAllTimers();
-
-    InteractionManager.runAfterInteractions(task2);
-    jest.runAllTimers();
-
-    expectToBeCalledOnce(task1);
-  });
-
-  it('runs tasks added while processing previous tasks', () => {
-    const task1 = jest.fn(() => {
-      InteractionManager.runAfterInteractions(task2);
-    });
-    const task2 = jest.fn();
-
-    InteractionManager.runAfterInteractions(task1);
-    expect(task2).not.toBeCalled();
-
-    jest.runAllTimers();
-
-    expect(task1).toBeCalled();
-    expect(task2).toBeCalled();
-  });
-
-  it('allows tasks to be cancelled', () => {
-    const task1 = jest.fn();
-    const task2 = jest.fn();
-    const promise1 = InteractionManager.runAfterInteractions(task1);
-    InteractionManager.runAfterInteractions(task2);
-    expect(task1).not.toBeCalled();
-    expect(task2).not.toBeCalled();
-    promise1.cancel();
-
-    jest.runAllTimers();
-    expect(task1).not.toBeCalled();
-    expect(task2).toBeCalled();
-  });
-});
-
-describe('promise tasks', () => {
-  let BatchedBridge;
-  let InteractionManager;
-  let sequenceId;
-
-  function createSequenceTask(expectedSequenceId: number) {
-    return jest.fn(() => {
-      expect(++sequenceId).toBe(expectedSequenceId);
-    });
-  }
-
-  beforeEach(() => {
-    jest.resetModules();
-
-    ({BatchedBridge, InteractionManager} = importModules({
-      disableInteractionManager: () => false,
-    }));
-
-    sequenceId = 0;
-  });
-
-  it('should run a basic promise task', () => {
-    const task1 = jest.fn(() => {
-      expect(++sequenceId).toBe(1);
-      return new Promise(resolve => resolve());
-    });
-    InteractionManager.runAfterInteractions({gen: task1, name: 'gen1'});
-    jest.runAllTimers();
-    expectToBeCalledOnce(task1);
-  });
-
-  it('should handle nested promises', () => {
-    const task1 = jest.fn(() => {
-      expect(++sequenceId).toBe(1);
-      return new Promise(resolve => {
-        InteractionManager.runAfterInteractions({
-          gen: task2,
-          name: 'gen2',
-        }).then(resolve);
-      });
-    });
-    const task2 = jest.fn(() => {
-      expect(++sequenceId).toBe(2);
-      return new Promise(resolve => resolve());
-    });
-    InteractionManager.runAfterInteractions({gen: task1, name: 'gen1'});
-    jest.runAllTimers();
-    expectToBeCalledOnce(task1);
-    expectToBeCalledOnce(task2);
-  });
-
-  it('should pause promise tasks during interactions then resume', () => {
-    const task1 = createSequenceTask(1);
-    const task2 = jest.fn(() => {
-      expect(++sequenceId).toBe(2);
-      return new Promise(resolve => {
-        setTimeout(() => {
-          InteractionManager.runAfterInteractions(task3).then(resolve);
-        }, 1);
-      });
-    });
-    const task3 = createSequenceTask(3);
-    InteractionManager.runAfterInteractions(task1);
-    InteractionManager.runAfterInteractions({gen: task2, name: 'gen2'});
-    jest.runOnlyPendingTimers();
-    expectToBeCalledOnce(task1);
-    expectToBeCalledOnce(task2);
-    const handle = InteractionManager.createInteractionHandle();
-    jest.runAllTimers();
-    jest.runAllTimers(); // Just to be sure...
-    expect(task3).not.toBeCalled();
-    InteractionManager.clearInteractionHandle(handle);
-    jest.runAllTimers();
-    expectToBeCalledOnce(task3);
-  });
-
-  it('should execute tasks in loop within deadline', () => {
-    InteractionManager.setDeadline(100);
-    BatchedBridge.getEventLoopRunningTime.mockReturnValue(10);
-    const task1 = createSequenceTask(1);
-    const task2 = createSequenceTask(2);
-    InteractionManager.runAfterInteractions(task1);
-    InteractionManager.runAfterInteractions(task2);
-
-    jest.runOnlyPendingTimers();
-
-    expectToBeCalledOnce(task1);
-    expectToBeCalledOnce(task2);
-  });
-
-  it('should execute tasks one at a time if deadline exceeded', () => {
-    InteractionManager.setDeadline(100);
-    BatchedBridge.getEventLoopRunningTime.mockReturnValue(200);
-    const task1 = createSequenceTask(1);
-    const task2 = createSequenceTask(2);
-    InteractionManager.runAfterInteractions(task1);
-    InteractionManager.runAfterInteractions(task2);
-
-    jest.runOnlyPendingTimers();
-
-    expectToBeCalledOnce(task1);
-    expect(task2).not.toBeCalled();
-
-    jest.runOnlyPendingTimers(); // resolve1
-    jest.runOnlyPendingTimers(); // task2
-
-    expectToBeCalledOnce(task2);
-  });
-
-  const bigAsyncTest = resolveTest => {
-    jest.useRealTimers();
-
-    const task1 = createSequenceTask(1);
-    const task2 = jest.fn(() => {
-      expect(++sequenceId).toBe(2);
-      return new Promise(resolve => {
-        InteractionManager.runAfterInteractions(task3);
-        setTimeout(() => {
-          InteractionManager.runAfterInteractions({
-            gen: task4,
-            name: 'gen4',
-          }).then(resolve);
-        }, 1);
-      });
-    });
-    const task3 = createSequenceTask(3);
-    const task4 = jest.fn(() => {
-      expect(++sequenceId).toBe(4);
-      return new Promise(resolve => {
-        InteractionManager.runAfterInteractions(task5).then(resolve);
-      });
-    });
-    const task5 = createSequenceTask(5);
-    const task6 = createSequenceTask(6);
-
-    InteractionManager.runAfterInteractions(task1);
-    InteractionManager.runAfterInteractions({gen: task2, name: 'gen2'});
-    InteractionManager.runAfterInteractions(task6);
-
-    setTimeout(() => {
-      expectToBeCalledOnce(task1);
-      expectToBeCalledOnce(task2);
-      expectToBeCalledOnce(task3);
-      expectToBeCalledOnce(task4);
-      expectToBeCalledOnce(task5);
-      expectToBeCalledOnce(task6);
-
-      resolveTest();
-    }, 100);
-  };
-
-  itif(!isWindows)(
-    'resolves async tasks recursively before other queued tasks',
-    () => {
-      return new Promise(bigAsyncTest);
-    },
-  );
-
-  itif(!isWindows)('should also work with a deadline', () => {
-    InteractionManager.setDeadline(100);
-    BatchedBridge.getEventLoopRunningTime.mockReturnValue(200);
-    return new Promise(bigAsyncTest);
-  });
-});

packages/react-native/Libraries/Interaction/__tests__/TaskQueue-test.js

@@ -1,169 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @noflow
- * @format
- */
-
-'use strict';
-
-const Promise = require('promise');
-
-function expectToBeCalledOnce(fn) {
-  expect(fn.mock.calls.length).toBe(1);
-}
-
-function clearTaskQueue(taskQueue) {
-  do {
-    jest.runAllTimers();
-    taskQueue.processNext();
-    jest.runAllTimers();
-  } while (taskQueue.hasTasksToProcess());
-}
-
-describe('TaskQueue', () => {
-  let taskQueue;
-  let onMoreTasks;
-  let sequenceId;
-  function createSequenceTask(expectedSequenceId) {
-    return jest.fn(() => {
-      expect(++sequenceId).toBe(expectedSequenceId);
-    });
-  }
-  beforeEach(() => {
-    jest.resetModules();
-    onMoreTasks = jest.fn();
-    const TaskQueue = require('../TaskQueue').default;
-    taskQueue = new TaskQueue({onMoreTasks});
-    sequenceId = 0;
-  });
-
-  it('should run a basic task', () => {
-    const task1 = createSequenceTask(1);
-    taskQueue.enqueue({run: task1, name: 'run1'});
-    expect(taskQueue.hasTasksToProcess()).toBe(true);
-    taskQueue.processNext();
-    expectToBeCalledOnce(task1);
-  });
-
-  it('should handle blocking promise task', () => {
-    const task1 = jest.fn(() => {
-      return new Promise(resolve => {
-        setTimeout(() => {
-          expect(++sequenceId).toBe(1);
-          resolve();
-        }, 1);
-      });
-    });
-    const task2 = createSequenceTask(2);
-    taskQueue.enqueue({gen: task1, name: 'gen1'});
-    taskQueue.enqueue({run: task2, name: 'run2'});
-
-    taskQueue.processNext();
-
-    expectToBeCalledOnce(task1);
-    expect(task2).not.toBeCalled();
-    expect(onMoreTasks).not.toBeCalled();
-    expect(taskQueue.hasTasksToProcess()).toBe(false);
-
-    clearTaskQueue(taskQueue);
-
-    expectToBeCalledOnce(onMoreTasks);
-    expectToBeCalledOnce(task2);
-  });
-
-  it('should handle nested simple tasks', () => {
-    const task1 = jest.fn(() => {
-      expect(++sequenceId).toBe(1);
-      taskQueue.enqueue({run: task3, name: 'run3'});
-    });
-    const task2 = createSequenceTask(2);
-    const task3 = createSequenceTask(3);
-    taskQueue.enqueue({run: task1, name: 'run1'});
-    taskQueue.enqueue({run: task2, name: 'run2'}); // not blocked by task 1
-
-    clearTaskQueue(taskQueue);
-
-    expectToBeCalledOnce(task1);
-    expectToBeCalledOnce(task2);
-    expectToBeCalledOnce(task3);
-  });
-
-  it('should handle nested promises', () => {
-    const task1 = jest.fn(() => {
-      return new Promise(resolve => {
-        setTimeout(() => {
-          expect(++sequenceId).toBe(1);
-          taskQueue.enqueue({gen: task2, name: 'gen2'});
-          taskQueue.enqueue({run: resolve, name: 'resolve1'});
-        }, 1);
-      });
-    });
-    const task2 = jest.fn(() => {
-      return new Promise(resolve => {
-        setTimeout(() => {
-          expect(++sequenceId).toBe(2);
-          taskQueue.enqueue({run: task3, name: 'run3'});
-          taskQueue.enqueue({run: resolve, name: 'resolve2'});
-        }, 1);
-      });
-    });
-    const task3 = createSequenceTask(3);
-    const task4 = createSequenceTask(4);
-    taskQueue.enqueue({gen: task1, name: 'gen1'});
-    taskQueue.enqueue({run: task4, name: 'run4'}); // blocked by task 1 promise
-
-    clearTaskQueue(taskQueue);
-
-    expectToBeCalledOnce(task1);
-    expectToBeCalledOnce(task2);
-    expectToBeCalledOnce(task3);
-    expectToBeCalledOnce(task4);
-  });
-
-  it('should be able to cancel tasks', () => {
-    const task1 = jest.fn();
-    const task2 = createSequenceTask(1);
-    const task3 = jest.fn();
-    const task4 = createSequenceTask(2);
-    taskQueue.enqueue(task1);
-    taskQueue.enqueue(task2);
-    taskQueue.enqueue(task3);
-    taskQueue.enqueue(task4);
-    taskQueue.cancelTasks([task1, task3]);
-    clearTaskQueue(taskQueue);
-    expect(task1).not.toBeCalled();
-    expect(task3).not.toBeCalled();
-    expectToBeCalledOnce(task2);
-    expectToBeCalledOnce(task4);
-    expect(taskQueue.hasTasksToProcess()).toBe(false);
-  });
-
-  it('should not crash when last task is cancelled', () => {
-    const task1 = jest.fn();
-    taskQueue.enqueue(task1);
-    taskQueue.cancelTasks([task1]);
-    clearTaskQueue(taskQueue);
-    expect(task1).not.toBeCalled();
-    expect(taskQueue.hasTasksToProcess()).toBe(false);
-  });
-
-  it('should not crash when task is cancelled between being started and resolved', () => {
-    const task1 = jest.fn(() => {
-      return new Promise(resolve => {
-        setTimeout(() => {
-          resolve();
-        }, 1);
-      });
-    });
-
-    taskQueue.enqueue({gen: task1, name: 'gen1'});
-    taskQueue.processNext();
-    taskQueue.cancelTasks([task1]);
-
-    jest.runAllTimers();
-  });
-});

packages/react-native/Libraries/Network/XMLHttpRequest.js

@@ -400,7 +400,6 @@ class XMLHttpRequest extends EventTarget {
     if (XMLHttpRequest._profiling) {
       console.timeStamp(
         'Incremental Data: ' + this._getMeasureURL(),
-        // $FlowFixMe[extra-arg] Add correct typing for `console.timeStamp`
         start,
         undefined,
         PERFORMANCE_TRACK_NAME,
@@ -455,7 +454,6 @@ class XMLHttpRequest extends EventTarget {
         const start = this._startTime;
         console.timeStamp(
           this._getMeasureURL(),
-          // $FlowFixMe[extra-arg] Add correct typing for `console.timeStamp`
           start,
           undefined,
           PERFORMANCE_TRACK_NAME,

packages/react-native/Libraries/promiseRejectionTrackingOptions.js

@@ -10,21 +10,21 @@
 
 import typeof {enable} from 'promise/setimmediate/rejection-tracking';
 
-import LogBox from './LogBox/LogBox';
+import ExceptionsManager from './Core/ExceptionsManager';
 
 let rejectionTrackingOptions: $NonMaybeType<Parameters<enable>[0]> = {
   allRejections: true,
-  onUnhandled: (id, rejection = {}) => {
+  onUnhandled: (id, rejection) => {
     let message: string;
-    let stack: ?string;
 
-    // $FlowFixMe[method-unbinding] added when improving typing for this parameters
-    const stringValue = Object.prototype.toString.call(rejection);
-    if (stringValue === '[object Error]') {
+    if (rejection === undefined) {
+      message = '';
+    } else if (
+      // $FlowFixMe[method-unbinding] added when improving typing for this parameters
+      Object.prototype.toString.call(rejection) === '[object Error]'
+    ) {
       // $FlowFixMe[method-unbinding] added when improving typing for this parameters
       message = Error.prototype.toString.call(rejection);
-      const error: Error = (rejection: $FlowFixMe);
-      stack = error.stack;
     } else {
       try {
         message = require('pretty-format').format(rejection);
@@ -34,37 +34,23 @@ let rejectionTrackingOptions: $NonMaybeType<Parameters<enable>[0]> = {
             ? rejection
             : JSON.stringify((rejection: $FlowFixMe));
       }
-      // It could although this object is not a standard error, it still has stack information to unwind
-      // $FlowFixMe ignore types just check if stack is there
-      if (rejection?.stack && typeof rejection.stack === 'string') {
-        stack = rejection.stack;
-      }
     }
 
-    const warning = `Possible unhandled promise rejection (id: ${id}):\n${
-      message ?? ''
-    }`;
-    if (__DEV__) {
-      LogBox.addLog({
-        level: 'warn',
-        message: {
-          content: warning,
-          substitutions: [],
+    ExceptionsManager.handleException(
+      new Error(
+        `Uncaught (in promise, id: ${id})${message ? `: "${message}"` : ''}`,
+        {
+          cause: rejection,
         },
-        componentStack: [],
-        componentStackType: null,
-        stack,
-        category: 'possible_unhandled_promise_rejection',
-      });
-    } else {
-      console.warn(warning);
-    }
+      ),
+      false /* isFatal */,
+    );
   },
   onHandled: id => {
     const warning =
       `Promise rejection handled (id: ${id})\n` +
       'This means you can ignore any previous messages of the form ' +
-      `"Possible unhandled promise rejection (id: ${id}):"`;
+      `"Uncaught (in promise, id: ${id})"`;
     console.warn(warning);
   },
 };

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -31,8 +31,8 @@ public abstract class com/facebook/react/HeadlessJsTaskService : android/app/Ser
 	public fun <init> ()V
 	public static final fun acquireWakeLockNow (Landroid/content/Context;)V
 	protected final fun getReactContext ()Lcom/facebook/react/bridge/ReactContext;
-	protected final fun getReactHost ()Lcom/facebook/react/ReactHost;
-	protected final fun getReactNativeHost ()Lcom/facebook/react/ReactNativeHost;
+	protected fun getReactHost ()Lcom/facebook/react/ReactHost;
+	protected fun getReactNativeHost ()Lcom/facebook/react/ReactNativeHost;
 	protected fun getTaskConfig (Landroid/content/Intent;)Lcom/facebook/react/jstasks/HeadlessJsTaskConfig;
 	public fun onBind (Landroid/content/Intent;)Landroid/os/IBinder;
 	public fun onDestroy ()V

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/HeadlessJsTaskService.kt

@@ -113,7 +113,7 @@ public abstract class HeadlessJsTaskService : Service(), HeadlessJsTaskEventList
    * somewhere.
    */
   @Suppress("DEPRECATION")
-  protected val reactNativeHost: ReactNativeHost
+  protected open val reactNativeHost: ReactNativeHost
     get() = (application as ReactApplication).reactNativeHost
 
   /**
@@ -121,7 +121,7 @@ public abstract class HeadlessJsTaskService : Service(), HeadlessJsTaskEventList
    * [ReactApplication] and calls [ReactApplication.reactHost]. This method assumes it is called in
    * new architecture and returns null if not.
    */
-  protected val reactHost: ReactHost?
+  protected open val reactHost: ReactHost?
     get() = (application as ReactApplication).reactHost
 
   protected val reactContext: ReactContext?

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/ReactRootView.java

@@ -135,6 +135,10 @@ public class ReactRootView extends FrameLayout implements RootView, ReactRoot {
   private void init() {
     setRootViewTag(ReactRootViewTagGenerator.getNextRootViewTag());
     setClipChildren(false);
+
+    if (ReactNativeFeatureFlags.enableFontScaleChangesUpdatingLayout()) {
+      DisplayMetricsHolder.initDisplayMetrics(getContext().getApplicationContext());
+    }
   }
 
   @Override

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsDefaults.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<99019349a8f3642c42e6dac5f1476e7f>>
+ * @generated SignedSource<<c5ed8a904dcda7ade87527233b879b92>>
  */
 
 /**
@@ -101,7 +101,7 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi
 
   override fun enableVirtualViewDebugFeatures(): Boolean = false
 
-  override fun enableVirtualViewRenderState(): Boolean = false
+  override fun enableVirtualViewRenderState(): Boolean = true
 
   override fun enableVirtualViewWindowFocusDetection(): Boolean = false
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/OnLayoutEvent.kt

@@ -19,7 +19,7 @@ import com.facebook.react.uimanager.PixelUtil.toDIPFromPixel
 import com.facebook.react.uimanager.events.Event
 
 /** Event used to notify JS component about changes of its position or dimensions. */
-@LegacyArchitecture(logLevel = LegacyArchitectureLogLevel.ERROR)
+@LegacyArchitecture(logLevel = LegacyArchitectureLogLevel.WARNING)
 public class OnLayoutEvent private constructor() : Event<OnLayoutEvent>() {
   @VisibleForTesting internal var x: Int = 0
   @VisibleForTesting internal var y: Int = 0
@@ -60,7 +60,7 @@ public class OnLayoutEvent private constructor() : Event<OnLayoutEvent>() {
   public companion object {
     init {
       LegacyArchitectureLogger.assertLegacyArchitecture(
-          "OnLayoutEvent", LegacyArchitectureLogLevel.ERROR)
+          "OnLayoutEvent", LegacyArchitectureLogLevel.WARNING)
     }
 
     private val EVENTS_POOL: SynchronizedPool<OnLayoutEvent> = SynchronizedPool<OnLayoutEvent>(20)

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactScrollView.java

@@ -377,6 +377,9 @@ public class ReactScrollView extends ScrollView
     }
 
     ReactScrollViewHelper.emitLayoutEvent(this);
+    if (mVirtualViewContainerState != null) {
+      mVirtualViewContainerState.updateState();
+    }
   }
 
   @Override
@@ -486,6 +489,9 @@ public class ReactScrollView extends ScrollView
             this,
             mOnScrollDispatchHelper.getXFlingVelocity(),
             mOnScrollDispatchHelper.getYFlingVelocity());
+        if (mVirtualViewContainerState != null) {
+          mVirtualViewContainerState.updateState();
+        }
       }
     } finally {
       Systrace.endSection(Systrace.TRACE_TAG_REACT);

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/scroll/VirtualViewContainer.kt

@@ -11,6 +11,7 @@ import android.graphics.Rect
 import android.view.ViewGroup
 import com.facebook.common.logging.FLog
 import com.facebook.react.common.build.ReactBuildConfig
+import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags
 import com.facebook.react.views.virtual.VirtualViewMode
 import java.util.*
 
@@ -45,22 +46,19 @@ private fun rectsOverlap(rect1: Rect, rect2: Rect): Boolean {
   return true
 }
 
-internal class VirtualViewContainerState(private val scrollView: ViewGroup) :
-    ReactScrollViewHelper.ScrollListener {
+internal class VirtualViewContainerState(private val scrollView: ViewGroup) {
 
-  private val prerenderRatio: Int = 1
+  private val prerenderRatio: Double = ReactNativeFeatureFlags.virtualViewPrerenderRatio()
   private val virtualViews: MutableSet<VirtualView> = mutableSetOf()
   private val emptyRect: Rect = Rect()
   private val visibleRect: Rect = Rect()
   private val prerenderRect: Rect = Rect()
 
-  init {
-    ReactScrollViewHelper.addScrollListener(this)
-  }
-
-  public fun add(virtualView: VirtualView) {
-    assert(virtualViews.add(virtualView)) {
-      "Attempting to add duplicate VirtualView: ${virtualView.virtualViewID}"
+  public fun onChange(virtualView: VirtualView) {
+    if (virtualViews.add(virtualView)) {
+      debugLog("add", { "virtualViewID=${virtualView.virtualViewID}" })
+    } else {
+      debugLog("update", { "virtualViewID=${virtualView.virtualViewID}" })
     }
     updateModes(virtualView)
   }
@@ -69,35 +67,13 @@ internal class VirtualViewContainerState(private val scrollView: ViewGroup) :
     assert(virtualViews.remove(virtualView)) {
       "Attempting to remove non-existent VirtualView: ${virtualView.virtualViewID}"
     }
+    debugLog("remove", { "virtualViewID=${virtualView.virtualViewID}" })
   }
 
-  // ReactScrollViewHelper.ScrollListener.onLayout
-  // Emitted from ScrollView's onLayout
-  override fun onLayout(scrollView: ViewGroup?) {
-    // ReactScrollViewHelper is global
-    if (this.scrollView == scrollView) {
-      debugLog("ReactScrollViewHelper.onLayout")
-      updateModes()
-    }
-  }
-
-  // ReactScrollViewHelper.ScrollListener.onScroll
-  // Emitted from ScrollView's onLayout
-  override fun onScroll(
-      scrollView: ViewGroup?,
-      scrollEventType: ScrollEventType?,
-      xVelocity: Float,
-      yVelocity: Float
-  ) {
-    // ReactScrollViewHelper is global
-    if (this.scrollView == scrollView) {
-      debugLog("ReactScrollViewHelper.onScroll")
-      updateModes()
-    }
-  }
-
-  public fun update(virtualView: VirtualView) {
-    updateModes(virtualView)
+  // Called on ScrollView onLayout or onScroll
+  public fun updateState() {
+    debugLog("VirtualViewContainer.updateState")
+    updateModes()
   }
 
   private fun updateModes(virtualView: VirtualView? = null) {
@@ -110,17 +86,26 @@ internal class VirtualViewContainerState(private val scrollView: ViewGroup) :
     val virtualViewsIt = if (virtualView != null) listOf(virtualView) else virtualViews
     virtualViewsIt.forEach { vv ->
       val rect = vv.containerRelativeRect
+
+      var mode = VirtualViewMode.Hidden
+      var thresholdRect = emptyRect
       when {
+        rect.isEmpty -> {}
         rectsOverlap(rect, visibleRect) -> {
-          vv.onModeChange(VirtualViewMode.Visible, visibleRect)
+          mode = VirtualViewMode.Visible
+          thresholdRect = visibleRect
         }
         rectsOverlap(rect, prerenderRect) -> {
-          vv.onModeChange(VirtualViewMode.Prerender, prerenderRect)
-        }
-        else -> {
-          vv.onModeChange(VirtualViewMode.Hidden, emptyRect)
+          mode = VirtualViewMode.Prerender
+          thresholdRect = prerenderRect
         }
+        else -> {}
       }
+
+      debugLog(
+          "updateModes",
+          { "virtualView=${vv.virtualViewID} mode=$mode  rect=$rect thresholdRect=$thresholdRect" })
+      vv.onModeChange(mode, thresholdRect)
     }
   }
 }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/virtual/viewexperimental/ReactVirtualViewExperimental.kt

@@ -34,6 +34,7 @@ public class ReactVirtualViewExperimental(context: Context) :
   override val containerRelativeRect: Rect = Rect()
   private var offsetX: Int = 0
   private var offsetY: Int = 0
+  private var hadLayout: Boolean = false
 
   internal val nativeId: String?
     get() = getTag(R.id.view_tag_native_id) as? String
@@ -45,14 +46,20 @@ public class ReactVirtualViewExperimental(context: Context) :
 
   @VisibleForTesting
   internal fun doAttachedToWindow() {
-    // Assuming that layout has been called before this
-    scrollView = getScrollView()?.also { scrollView?.virtualViewContainerState?.add(this) }
+    scrollView = getScrollView()
+    // onAttachedToWindow is usually called before layout but there are cases where it's called
+    // after. If called after, we need to report the updated layout to the VirtualViewContainer
+    if (hadLayout) {
+      updateParentOffset()
+      reportChangeToContainer()
+    }
   }
 
   /** From [View#onLayout] */
   // This is when the view itself has layout changes
   override fun onLayout(changed: Boolean, left: Int, top: Int, right: Int, bottom: Int) {
     super.onLayout(changed, left, top, right, bottom)
+    hadLayout = true
     if (changed) {
       containerRelativeRect.set(
           left + offsetX,
@@ -60,7 +67,7 @@ public class ReactVirtualViewExperimental(context: Context) :
           right + offsetX,
           bottom + offsetY,
       )
-      updateContainer()
+      reportChangeToContainer()
     }
   }
 
@@ -77,24 +84,8 @@ public class ReactVirtualViewExperimental(context: Context) :
       oldBottom: Int
   ) {
     if (oldLeft != left || oldTop != top) {
-      val virtualViewScrollView = scrollView ?: return
-      offsetX = 0
-      offsetY = 0
-      var parent: ViewParent? = parent
-      while (parent != null && parent != virtualViewScrollView) {
-        if (parent is View) {
-          offsetX += parent.left
-          offsetY += parent.top
-        }
-        parent = parent.parent
-      }
-      containerRelativeRect.set(
-          left + offsetX,
-          top + offsetY,
-          right + offsetX,
-          bottom + offsetY,
-      )
-      updateContainer()
+      updateParentOffset()
+      reportChangeToContainer()
     }
   }
 
@@ -109,6 +100,8 @@ public class ReactVirtualViewExperimental(context: Context) :
     scrollView = null
     mode = null
     modeChangeEmitter = null
+    hadLayout = false
+    containerRelativeRect.setEmpty()
   }
 
   override val virtualViewID: String
@@ -156,8 +149,28 @@ public class ReactVirtualViewExperimental(context: Context) :
     }
   }
 
-  private fun updateContainer() {
-    scrollView?.virtualViewContainerState?.update(this)
+  private fun updateParentOffset() {
+    val virtualViewScrollView = scrollView ?: return
+    offsetX = 0
+    offsetY = 0
+    var parent: ViewParent? = parent
+    while (parent != null && parent != virtualViewScrollView) {
+      if (parent is View) {
+        offsetX += parent.left
+        offsetY += parent.top
+      }
+      parent = parent.parent
+    }
+    containerRelativeRect.set(
+        left + offsetX,
+        top + offsetY,
+        right + offsetX,
+        bottom + offsetY,
+    )
+  }
+
+  private fun reportChangeToContainer() {
+    scrollView?.virtualViewContainerState?.onChange(this)
   }
 
   private fun getScrollView(): VirtualViewContainer? = traverseParentStack(true)

packages/react-native/ReactAndroid/src/main/jni/react/jni/CMakeLists.txt

@@ -38,7 +38,7 @@ add_library(
 target_merge_so(reactnativejni_common)
 target_include_directories(reactnativejni_common PUBLIC ../../)
 
-target_link_libraries(reactnativejni_common fbjni folly_runtime react_cxxreact)
+target_link_libraries(reactnativejni_common fbjni folly_runtime react_cxxreact rrc_view)
 target_compile_reactnative_options(reactnativejni_common PRIVATE)
 target_compile_options(reactnativejni_common PRIVATE -Wno-unused-lambda-capture)
 

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsDefaults.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<d7534fe6e3b398e56c179da8233e3b0a>>
+ * @generated SignedSource<<614fe0894f6235d879a0b29e7dab7759>>
  */
 
 /**
@@ -184,7 +184,7 @@ class ReactNativeFeatureFlagsDefaults : public ReactNativeFeatureFlagsProvider {
   }
 
   bool enableVirtualViewRenderState() override {
-    return false;
+    return true;
   }
 
   bool enableVirtualViewWindowFocusDetection() override {

packages/react-native/ReactCommon/react/nativemodule/intersectionobserver/NativeIntersectionObserver.cpp

@@ -49,21 +49,6 @@ NativeIntersectionObserver::NativeIntersectionObserver(
     std::shared_ptr<CallInvoker> jsInvoker)
     : NativeIntersectionObserverCxxSpec(std::move(jsInvoker)) {}
 
-void NativeIntersectionObserver::observe(
-    jsi::Runtime& runtime,
-    NativeIntersectionObserverObserveOptions options) {
-  observeV2(runtime, std::move(options));
-}
-
-void NativeIntersectionObserver::unobserve(
-    jsi::Runtime& runtime,
-    IntersectionObserverObserverId intersectionObserverId,
-    std::shared_ptr<const ShadowNode> targetShadowNode) {
-  auto token =
-      tokenFromShadowNodeFamily(runtime, targetShadowNode->getFamilyShared());
-  unobserveV2(runtime, intersectionObserverId, std::move(token));
-}
-
 jsi::Object NativeIntersectionObserver::observeV2(
     jsi::Runtime& runtime,
     NativeIntersectionObserverObserveOptions options) {

packages/react-native/ReactCommon/react/nativemodule/intersectionobserver/NativeIntersectionObserver.h

@@ -64,19 +64,6 @@ class NativeIntersectionObserver
  public:
   NativeIntersectionObserver(std::shared_ptr<CallInvoker> jsInvoker);
 
-  // TODO(T223605846): Remove legacy observe method
-  [[deprecated("Please use observeV2")]]
-  void observe(
-      jsi::Runtime& runtime,
-      NativeIntersectionObserverObserveOptions options);
-
-  // TODO(T223605846): Remove legacy unobserve method
-  [[deprecated("Please use unobserveV2")]]
-  void unobserve(
-      jsi::Runtime& runtime,
-      IntersectionObserverObserverId intersectionObserverId,
-      std::shared_ptr<const ShadowNode> targetShadowNode);
-
   jsi::Object observeV2(
       jsi::Runtime& runtime,
       NativeIntersectionObserverObserveOptions options);

packages/react-native/ReactCommon/react/renderer/core/ShadowNode.cpp

@@ -379,9 +379,9 @@ std::shared_ptr<ShadowNode> ShadowNode::cloneTree(
   }
 
   auto& parent = ancestors.back();
-  auto& targetShadowNode = parent.first.get().getChildren().at(parent.second);
+  auto& oldShadowNode = parent.first.get().getChildren().at(parent.second);
 
-  auto newShadowNode = callback(*targetShadowNode);
+  auto newShadowNode = callback(*oldShadowNode);
 
   react_native_assert(
       newShadowNode &&

packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.cpp

@@ -251,11 +251,12 @@ CommitStatus ShadowTree::commit(
       if (status != CommitStatus::Failed) {
         return status;
       }
+      attempts++;
     }
 
     {
       std::unique_lock lock(commitMutex_);
-      return tryCommit(transaction, commitOptions);
+      return tryCommit(transaction, commitOptions, true);
     }
   } else {
     while (true) {
@@ -275,7 +276,8 @@ CommitStatus ShadowTree::commit(
 
 CommitStatus ShadowTree::tryCommit(
     const ShadowTreeCommitTransaction& transaction,
-    const CommitOptions& commitOptions) const {
+    const CommitOptions& commitOptions,
+    bool hasLocked) const {
   TraceSection s("ShadowTree::commit");
 
   auto telemetry = TransactionTelemetry{};
@@ -287,7 +289,10 @@ CommitStatus ShadowTree::tryCommit(
 
   {
     // Reading `currentRevision_` in shared manner.
-    std::shared_lock lock(commitMutex_);
+    std::shared_lock lock(commitMutex_, std::defer_lock);
+    if (!hasLocked) {
+      lock.lock();
+    }
     commitMode = commitMode_;
     oldRevision = currentRevision_;
   }
@@ -328,7 +333,10 @@ CommitStatus ShadowTree::tryCommit(
 
   {
     // Updating `currentRevision_` in unique manner if it hasn't changed.
-    std::unique_lock lock(commitMutex_);
+    std::unique_lock lock(commitMutex_, std::defer_lock);
+    if (!hasLocked) {
+      lock.lock();
+    }
 
     if (currentRevision_.number != oldRevision.number) {
       return CommitStatus::Failed;

packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.h

@@ -111,7 +111,8 @@ class ShadowTree final {
    */
   CommitStatus tryCommit(
       const ShadowTreeCommitTransaction& transaction,
-      const CommitOptions& commitOptions) const;
+      const CommitOptions& commitOptions,
+      bool hasLocked = false) const;
 
   /*
    * Calls `tryCommit` in a loop until it finishes successfully.

packages/react-native/ReactNativeApi.d.ts

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<83d07f37fd6028027511209f02e7f056>>
+ * @generated SignedSource<<a942544e271327a89ec40682d3ec736d>>
  *
  * This file was generated by scripts/js-api/build-types/index.js.
  */
@@ -257,18 +257,17 @@ declare const Image: ImageType
 declare const ImageViewNativeComponent_default: HostComponent<ImageHostComponentProps>
 declare const InputAccessoryView: typeof InputAccessoryView_default
 declare const InputAccessoryView_default: React.ComponentType<InputAccessoryViewProps>
-declare const InteractionManager: typeof InteractionManager_default
-declare const InteractionManager_default: typeof InteractionManagerImpl
-declare const InteractionManagerImpl: {
+declare const InteractionManager: typeof InteractionManagerStub_default
+declare const InteractionManagerStub_default: {
   Events: {
     interactionComplete: "interactionComplete"
     interactionStart: "interactionStart"
   }
-  addListener: (
+  addListener(
     eventType: string,
     listener: (...args: any) => unknown,
     context: unknown,
-  ) => EventSubscription
+  ): EventSubscription
   clearInteractionHandle(handle: Handle): void
   createInteractionHandle(): Handle
   runAfterInteractions(task: null | Task | undefined): {

packages/react-native/flow/bom.js.flow

@@ -12,6 +12,71 @@
 
 declare var window: typeof globalThis;
 
+type DevToolsColor =
+  | 'primary'
+  | 'primary-light'
+  | 'primary-dark'
+  | 'secondary'
+  | 'secondary-light'
+  | 'secondary-dark'
+  | 'tertiary'
+  | 'tertiary-light'
+  | 'tertiary-dark'
+  | 'warning'
+  | 'error';
+
+// $FlowExpectedError[libdef-override] Flow core definitions are incomplete.
+declare var console: {
+  // Logging
+  log(...data: $ReadOnlyArray<mixed>): void,
+  trace(...data: $ReadOnlyArray<mixed>): void,
+  debug(...data: $ReadOnlyArray<mixed>): void,
+  info(...data: $ReadOnlyArray<mixed>): void,
+  warn(...data: $ReadOnlyArray<mixed>): void,
+  error(...data: $ReadOnlyArray<mixed>): void,
+
+  // Grouping
+  group(...data: $ReadOnlyArray<mixed>): void,
+  groupCollapsed(...data: $ReadOnlyArray<mixed>): void,
+  groupEnd(): void,
+
+  // Printing
+  table(
+    tabularData:
+      | $ReadOnly<{[key: string]: mixed, ...}>
+      | $ReadOnlyArray<$ReadOnly<{[key: string]: mixed, ...}>>
+      | $ReadOnlyArray<$ReadOnlyArray<mixed>>,
+  ): void,
+  dir(...data: $ReadOnlyArray<mixed>): void,
+  dirxml(...data: $ReadOnlyArray<mixed>): void,
+  clear(): void,
+
+  // Utilities
+  assert(condition: mixed, ...data: $ReadOnlyArray<mixed>): void,
+
+  // Profiling
+  profile(name?: string): void,
+  profileEnd(name?: string): void,
+
+  // Counts
+  count(label?: string): void,
+  countReset(label?: string): void,
+
+  // Timing / tracing
+  time(label?: string): void,
+  timeEnd(label?: string): void,
+  timeStamp(
+    label?: string,
+    start?: string | number,
+    end?: string | number,
+    trackName?: string,
+    trackGroup?: string,
+    color?: DevToolsColor,
+  ): void,
+
+  ...
+};
+
 declare class Navigator {
   product: 'ReactNative';
   appName?: ?string;

packages/react-native/package.json

@@ -21,7 +21,7 @@
   ],
   "bugs": "https://github.com/facebook/react-native/issues",
   "engines": {
-    "node": ">= 22.14.0"
+    "node": ">= 20.19.4"
   },
   "bin": {
     "react-native": "cli.js"
@@ -106,6 +106,7 @@
     "ReactCommon",
     "README.md",
     "rn-get-polyfills.js",
+    "scripts/replace-rncore-version.js",
     "scripts/bundle.js",
     "scripts/cocoapods",
     "scripts/codegen",

packages/react-native/scripts/featureflags/ReactNativeFeatureFlags.config.js

@@ -462,22 +462,24 @@ const definitions: FeatureFlagDefinitions = {
       ossReleaseStage: 'none',
     },
     enableVirtualViewRenderState: {
-      defaultValue: false,
+      defaultValue: true,
       metadata: {
+        dateAdded: '2025-06-25',
         description:
           'Enables reading render state when dispatching VirtualView events.',
         expectedReleaseValue: true,
-        purpose: 'operational',
+        purpose: 'experimentation',
       },
       ossReleaseStage: 'none',
     },
     enableVirtualViewWindowFocusDetection: {
       defaultValue: false,
       metadata: {
+        dateAdded: '2025-06-24',
         description:
           'Enables window focus detection for prioritizing VirtualView events.',
         expectedReleaseValue: true,
-        purpose: 'operational',
+        purpose: 'experimentation',
       },
       ossReleaseStage: 'none',
     },
@@ -708,17 +710,6 @@ const definitions: FeatureFlagDefinitions = {
 
   jsOnly: {
     ...testDefinitions.jsOnly,
-    alwaysFlattenAnimatedStyles: {
-      defaultValue: false,
-      metadata: {
-        dateAdded: '2025-06-02',
-        description:
-          'Changes `Animated` to always flatten style, fixing a bug with shadowed `AnimatedNode` instances.',
-        expectedReleaseValue: true,
-        purpose: 'experimentation',
-      },
-      ossReleaseStage: 'none',
-    },
     animatedShouldDebounceQueueFlush: {
       defaultValue: false,
       metadata: {
@@ -741,16 +732,6 @@ const definitions: FeatureFlagDefinitions = {
       },
       ossReleaseStage: 'none',
     },
-    avoidStateUpdateInAnimatedPropsMemo: {
-      defaultValue: true,
-      metadata: {
-        description:
-          'Changes `useAnimatedPropsMemo` to avoid state updates to invalidate the cached `AnimatedProps`.',
-        expectedReleaseValue: true,
-        purpose: 'release',
-      },
-      ossReleaseStage: 'none',
-    },
     deferFlatListFocusChangeRenderUpdate: {
       defaultValue: false,
       metadata: {
@@ -762,16 +743,6 @@ const definitions: FeatureFlagDefinitions = {
       },
       ossReleaseStage: 'none',
     },
-    disableInteractionManager: {
-      defaultValue: true,
-      metadata: {
-        description:
-          'Disables InteractionManager and replaces its scheduler with `setImmediate`.',
-        expectedReleaseValue: true,
-        purpose: 'release',
-      },
-      ossReleaseStage: 'none',
-    },
     enableAccessToHostTreeInFabric: {
       defaultValue: false,
       metadata: {
@@ -814,16 +785,6 @@ const definitions: FeatureFlagDefinitions = {
       },
       ossReleaseStage: 'none',
     },
-    scheduleAnimatedCleanupInMicrotask: {
-      defaultValue: true,
-      metadata: {
-        description:
-          'Changes the cleanup of `AnimatedProps` to occur in a microtask instead of synchronously during effect cleanup (for unmount) or subsequent mounts (for updates).',
-        expectedReleaseValue: true,
-        purpose: 'release',
-      },
-      ossReleaseStage: 'none',
-    },
     shouldUseAnimatedObjectForTransform: {
       defaultValue: false,
       metadata: {
@@ -856,16 +817,6 @@ const definitions: FeatureFlagDefinitions = {
       },
       ossReleaseStage: 'none',
     },
-    utilizeTokensInIntersectionObserver: {
-      defaultValue: true,
-      metadata: {
-        dateAdded: '2025-05-06',
-        description: 'Use tokens in IntersectionObserver vs ShadowNode.',
-        expectedReleaseValue: true,
-        purpose: 'experimentation',
-      },
-      ossReleaseStage: 'none',
-    },
   },
 };
 

packages/react-native/src/private/animated/createAnimatedPropsHook.js

@@ -89,13 +89,6 @@ export default function createAnimatedPropsHook(
       };
     });
 
-    // NOTE: This feature flag must be evaluated inside the hook because this
-    // module factory can be evaluated much sooner, before overrides are set.
-    const useAnimatedPropsLifecycle =
-      ReactNativeFeatureFlags.scheduleAnimatedCleanupInMicrotask()
-        ? useAnimatedPropsLifecycleWithCleanupInMicrotask
-        : useAnimatedPropsLifecycleWithPrevNodeRef;
-
     useAnimatedPropsLifecycle(node);
 
     // TODO: This "effect" does three things:
@@ -262,44 +255,6 @@ function addAnimatedValuesListenersToProps(
   }
 }
 
-/**
- * Manages the lifecycle of the supplied `AnimatedProps` by invoking `__attach`
- * and `__detach`. However, this is more complicated because `AnimatedProps`
- * uses reference counting to determine when to recursively detach its children
- * nodes. So in order to optimize this, we avoid detaching until the next attach
- * unless we are unmounting.
- */
-function useAnimatedPropsLifecycleWithPrevNodeRef(node: AnimatedProps): void {
-  const prevNodeRef = useRef<?AnimatedProps>(null);
-  const isUnmountingRef = useRef<boolean>(false);
-
-  useInsertionEffect(() => {
-    isUnmountingRef.current = false;
-    return () => {
-      isUnmountingRef.current = true;
-    };
-  }, []);
-
-  useInsertionEffect(() => {
-    node.__attach();
-    if (prevNodeRef.current != null) {
-      const prevNode = prevNodeRef.current;
-      // TODO: Stop restoring default values (unless `reset` is called).
-      prevNode.__restoreDefaultValues();
-      prevNode.__detach();
-      prevNodeRef.current = null;
-    }
-    return () => {
-      if (isUnmountingRef.current) {
-        // NOTE: Do not restore default values on unmount, see D18197735.
-        node.__detach();
-      } else {
-        prevNodeRef.current = node;
-      }
-    };
-  }, [node]);
-}
-
 /**
  * Manages the lifecycle of the supplied `AnimatedProps` by invoking `__attach`
  * and `__detach`. However, `__detach` occurs in a microtask for these reasons:
@@ -314,9 +269,7 @@ function useAnimatedPropsLifecycleWithPrevNodeRef(node: AnimatedProps): void {
  * callbacks may update state, which is unsupported and will force synchronous
  * updates.
  */
-function useAnimatedPropsLifecycleWithCleanupInMicrotask(
-  node: AnimatedProps,
-): void {
+function useAnimatedPropsLifecycle(node: AnimatedProps): void {
   const isMounted = useRef<boolean>(false);
 
   useInsertionEffect(() => {

packages/react-native/src/private/animated/createAnimatedPropsMemoHook.js

@@ -16,9 +16,8 @@ import {AnimatedEvent} from '../../../Libraries/Animated/AnimatedEvent';
 import AnimatedNode from '../../../Libraries/Animated/nodes/AnimatedNode';
 import {isPlainObject} from '../../../Libraries/Animated/nodes/AnimatedObject';
 import flattenStyle from '../../../Libraries/StyleSheet/flattenStyle';
-import * as ReactNativeFeatureFlags from '../featureflags/ReactNativeFeatureFlags';
 import nullthrows from 'nullthrows';
-import {useInsertionEffect, useMemo, useRef, useState} from 'react';
+import {useInsertionEffect, useMemo, useRef} from 'react';
 
 type CompositeKey = {
   style?: {[string]: CompositeKeyComponent},
@@ -64,19 +63,6 @@ export function createAnimatedPropsMemoHook(
   return function useAnimatedPropsMemo(
     create: () => AnimatedProps,
     props: $ReadOnly<{[string]: mixed}>,
-  ): AnimatedProps {
-    // NOTE: This feature flag must be evaluated inside the hook because this
-    // module factory can be evaluated much sooner, before overrides are set.
-    const useAnimatedPropsImpl =
-      ReactNativeFeatureFlags.avoidStateUpdateInAnimatedPropsMemo()
-        ? useAnimatedPropsMemo_ref
-        : useAnimatedPropsMemo_state;
-    return useAnimatedPropsImpl(create, props);
-  };
-
-  function useAnimatedPropsMemo_ref(
-    create: () => AnimatedProps,
-    props: $ReadOnly<{[string]: mixed}>,
   ): AnimatedProps {
     const compositeKey = useMemo(
       () => createCompositeKeyForProps(props, allowlist),
@@ -102,39 +88,7 @@ export function createAnimatedPropsMemoHook(
     }, [next]);
 
     return next.node;
-  }
-
-  function useAnimatedPropsMemo_state(
-    create: () => AnimatedProps,
-    props: $ReadOnly<{[string]: mixed}>,
-  ): AnimatedProps {
-    const compositeKey = useMemo(
-      () => createCompositeKeyForProps(props, allowlist),
-      [props],
-    );
-
-    const [state, setState] = useState<{
-      allowlist: ?AnimatedPropsAllowlist,
-      compositeKey: $ReadOnlyCompositeKey | null,
-      value: AnimatedProps,
-    }>(() => ({
-      allowlist,
-      compositeKey,
-      value: create(),
-    }));
-
-    if (
-      state.allowlist !== allowlist ||
-      !areCompositeKeysEqual(state.compositeKey, compositeKey)
-    ) {
-      setState({
-        allowlist,
-        compositeKey,
-        value: create(),
-      });
-    }
-    return state.value;
-  }
+  };
 }
 
 /**

packages/react-native/src/private/components/virtualview/VirtualView.js

@@ -14,6 +14,7 @@ import type ReadOnlyElement from '../../webapis/dom/nodes/ReadOnlyElement';
 import type {NativeModeChangeEvent} from './VirtualViewNativeComponent';
 
 import StyleSheet from '../../../../Libraries/StyleSheet/StyleSheet';
+import VirtualViewExperimentalNativeComponent from './VirtualViewExperimentalNativeComponent';
 import VirtualViewNativeComponent from './VirtualViewNativeComponent';
 import nullthrows from 'nullthrows';
 import * as React from 'react';
@@ -59,9 +60,16 @@ const NotHidden = null;
 
 type State = HiddenHeight | typeof NotHidden;
 
-function createVirtualView(initialState: State): VirtualViewComponent {
+function createVirtualView(
+  initialState: State,
+  experimental: boolean,
+): VirtualViewComponent {
   const initialHidden = initialState !== NotHidden;
 
+  const NativeComponent = experimental
+    ? VirtualViewExperimentalNativeComponent
+    : VirtualViewNativeComponent;
+
   component VirtualView(
     children?: React.Node,
     nativeID?: string,
@@ -112,7 +120,7 @@ function createVirtualView(initialState: State): VirtualViewComponent {
     };
 
     return (
-      <VirtualViewNativeComponent
+      <NativeComponent
         initialHidden={initialHidden}
         nativeID={nativeID}
         ref={ref}
@@ -130,16 +138,24 @@ function createVirtualView(initialState: State): VirtualViewComponent {
         }
         onModeChange={handleModeChange}>
         {isHidden ? null : children}
-      </VirtualViewNativeComponent>
+      </NativeComponent>
     );
   }
   return VirtualView;
 }
 
-export default createVirtualView(NotHidden) as VirtualViewComponent;
+export default createVirtualView(NotHidden, false) as VirtualViewComponent;
 
-export function createHiddenVirtualView(height: number): VirtualViewComponent {
-  return createVirtualView(height as HiddenHeight);
+export const VirtualViewExperimental = createVirtualView(
+  NotHidden,
+  true,
+) as VirtualViewComponent;
+
+export function createHiddenVirtualView(
+  height: number,
+  experimental: boolean,
+): VirtualViewComponent {
+  return createVirtualView(height as HiddenHeight, experimental);
 }
 
 export const _logs: {states?: Array<State>} = {};

packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<d30fc4e36ad600353c9b9098fd71430a>>
+ * @generated SignedSource<<a5b97c3df370225b7601f7375bb03ce0>>
  * @flow strict
  * @noformat
  */
@@ -29,21 +29,16 @@ import {
 
 export type ReactNativeFeatureFlagsJsOnly = $ReadOnly<{
   jsOnlyTestFlag: Getter<boolean>,
-  alwaysFlattenAnimatedStyles: Getter<boolean>,
   animatedShouldDebounceQueueFlush: Getter<boolean>,
   animatedShouldUseSingleOp: Getter<boolean>,
-  avoidStateUpdateInAnimatedPropsMemo: Getter<boolean>,
   deferFlatListFocusChangeRenderUpdate: Getter<boolean>,
-  disableInteractionManager: Getter<boolean>,
   enableAccessToHostTreeInFabric: Getter<boolean>,
   fixVirtualizeListCollapseWindowSize: Getter<boolean>,
   isLayoutAnimationEnabled: Getter<boolean>,
   reduceDefaultPropsInView: Getter<boolean>,
-  scheduleAnimatedCleanupInMicrotask: Getter<boolean>,
   shouldUseAnimatedObjectForTransform: Getter<boolean>,
   shouldUseRemoveClippedSubviewsAsDefaultOnIOS: Getter<boolean>,
   shouldUseSetNativePropsInFabric: Getter<boolean>,
-  utilizeTokensInIntersectionObserver: Getter<boolean>,
 }>;
 
 export type ReactNativeFeatureFlagsJsOnlyOverrides = OverridesFor<ReactNativeFeatureFlagsJsOnly>;
@@ -120,11 +115,6 @@ export type ReactNativeFeatureFlags = $ReadOnly<{
  */
 export const jsOnlyTestFlag: Getter<boolean> = createJavaScriptFlagGetter('jsOnlyTestFlag', false);
 
-/**
- * Changes `Animated` to always flatten style, fixing a bug with shadowed `AnimatedNode` instances.
- */
-export const alwaysFlattenAnimatedStyles: Getter<boolean> = createJavaScriptFlagGetter('alwaysFlattenAnimatedStyles', false);
-
 /**
  * Enables an experimental flush-queue debouncing in Animated.js.
  */
@@ -135,21 +125,11 @@ export const animatedShouldDebounceQueueFlush: Getter<boolean> = createJavaScrip
  */
 export const animatedShouldUseSingleOp: Getter<boolean> = createJavaScriptFlagGetter('animatedShouldUseSingleOp', false);
 
-/**
- * Changes `useAnimatedPropsMemo` to avoid state updates to invalidate the cached `AnimatedProps`.
- */
-export const avoidStateUpdateInAnimatedPropsMemo: Getter<boolean> = createJavaScriptFlagGetter('avoidStateUpdateInAnimatedPropsMemo', true);
-
 /**
  * Use the deferred cell render update mechanism for focus change in FlatList.
  */
 export const deferFlatListFocusChangeRenderUpdate: Getter<boolean> = createJavaScriptFlagGetter('deferFlatListFocusChangeRenderUpdate', false);
 
-/**
- * Disables InteractionManager and replaces its scheduler with `setImmediate`.
- */
-export const disableInteractionManager: Getter<boolean> = createJavaScriptFlagGetter('disableInteractionManager', true);
-
 /**
  * Enables access to the host tree in Fabric using DOM-compatible APIs.
  */
@@ -170,11 +150,6 @@ export const isLayoutAnimationEnabled: Getter<boolean> = createJavaScriptFlagGet
  */
 export const reduceDefaultPropsInView: Getter<boolean> = createJavaScriptFlagGetter('reduceDefaultPropsInView', true);
 
-/**
- * Changes the cleanup of `AnimatedProps` to occur in a microtask instead of synchronously during effect cleanup (for unmount) or subsequent mounts (for updates).
- */
-export const scheduleAnimatedCleanupInMicrotask: Getter<boolean> = createJavaScriptFlagGetter('scheduleAnimatedCleanupInMicrotask', true);
-
 /**
  * Enables use of AnimatedObject for animating transform values.
  */
@@ -190,11 +165,6 @@ export const shouldUseRemoveClippedSubviewsAsDefaultOnIOS: Getter<boolean> = cre
  */
 export const shouldUseSetNativePropsInFabric: Getter<boolean> = createJavaScriptFlagGetter('shouldUseSetNativePropsInFabric', true);
 
-/**
- * Use tokens in IntersectionObserver vs ShadowNode.
- */
-export const utilizeTokensInIntersectionObserver: Getter<boolean> = createJavaScriptFlagGetter('utilizeTokensInIntersectionObserver', true);
-
 /**
  * Common flag for testing. Do NOT modify.
  */
@@ -358,7 +328,7 @@ export const enableVirtualViewDebugFeatures: Getter<boolean> = createNativeFlagG
 /**
  * Enables reading render state when dispatching VirtualView events.
  */
-export const enableVirtualViewRenderState: Getter<boolean> = createNativeFlagGetter('enableVirtualViewRenderState', false);
+export const enableVirtualViewRenderState: Getter<boolean> = createNativeFlagGetter('enableVirtualViewRenderState', true);
 /**
  * Enables window focus detection for prioritizing VirtualView events.
  */

packages/react-native/src/private/webapis/intersectionobserver/__tests__/IntersectionObserver-itest.js

@@ -4,7 +4,6 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @fantom_flags utilizeTokensInIntersectionObserver:*
  * @flow strict-local
  * @format
  */
@@ -20,7 +19,6 @@ import * as Fantom from '@react-native/fantom';
 import * as React from 'react';
 import {createRef, useState} from 'react';
 import {ScrollView, View} from 'react-native';
-import * as ReactNativeFeatureFlags from 'react-native/src/private/featureflags/ReactNativeFeatureFlags';
 import setUpIntersectionObserver from 'react-native/src/private/setup/setUpIntersectionObserver';
 import ReactNativeElement from 'react-native/src/private/webapis/dom/nodes/ReactNativeElement';
 import DOMRectReadOnly from 'react-native/src/private/webapis/geometry/DOMRectReadOnly';
@@ -1494,44 +1492,42 @@ describe('IntersectionObserver', () => {
       });
     });
 
-    if (ReactNativeFeatureFlags.utilizeTokensInIntersectionObserver()) {
-      it('should not retain initial children of observed targets', () => {
-        const root = Fantom.createRoot();
-        observer = new IntersectionObserver(() => {});
+    it('should not retain initial children of observed targets', () => {
+      const root = Fantom.createRoot();
+      observer = new IntersectionObserver(() => {});
 
-        const [getReferenceCount, ref] = createShadowNodeReferenceCountingRef();
+      const [getReferenceCount, ref] = createShadowNodeReferenceCountingRef();
 
-        const observeRef: React.RefSetter<
-          React.ElementRef<typeof View>,
-        > = instance => {
-          const element = ensureReactNativeElement(instance);
-          observer.observe(element);
-          return () => {
-            observer.unobserve(element);
-          };
+      const observeRef: React.RefSetter<
+        React.ElementRef<typeof View>,
+      > = instance => {
+        const element = ensureReactNativeElement(instance);
+        observer.observe(element);
+        return () => {
+          observer.unobserve(element);
         };
+      };
 
-        function Observe({children}: $ReadOnly<{children?: React.Node}>) {
-          return <View ref={observeRef}>{children}</View>;
-        }
+      function Observe({children}: $ReadOnly<{children?: React.Node}>) {
+        return <View ref={observeRef}>{children}</View>;
+      }
 
-        Fantom.runTask(() => {
-          root.render(
-            <Observe>
-              <View ref={ref} />
-            </Observe>,
-          );
-        });
-
-        expect(getReferenceCount()).toBeGreaterThan(0);
-
-        Fantom.runTask(() => {
-          root.render(<Observe />);
-        });
-
-        expect(getReferenceCount()).toBe(0);
+      Fantom.runTask(() => {
+        root.render(
+          <Observe>
+            <View ref={ref} />
+          </Observe>,
+        );
       });
-    }
+
+      expect(getReferenceCount()).toBeGreaterThan(0);
+
+      Fantom.runTask(() => {
+        root.render(<Observe />);
+      });
+
+      expect(getReferenceCount()).toBe(0);
+    });
 
     it('should NOT report multiple entries when observing a target that exists and we modify it later in the same tick', () => {
       const root = Fantom.createRoot({

packages/react-native/src/private/webapis/intersectionobserver/internals/IntersectionObserverManager.js

@@ -27,13 +27,13 @@ import type {NativeIntersectionObserverToken} from '../specs/NativeIntersectionO
 
 import * as Systrace from '../../../../../Libraries/Performance/Systrace';
 import warnOnce from '../../../../../Libraries/Utilities/warnOnce';
-import * as ReactNativeFeatureFlags from '../../../featureflags/ReactNativeFeatureFlags';
 import {
   getInstanceHandle,
   getNativeNodeReference,
 } from '../../dom/nodes/internals/NodeInternals';
 import {createIntersectionObserverEntry} from '../IntersectionObserverEntry';
 import NativeIntersectionObserver from '../specs/NativeIntersectionObserver';
+import nullthrows from 'nullthrows';
 
 export type IntersectionObserverId = number;
 
@@ -69,36 +69,11 @@ function setTargetForInstanceHandle(
   instanceHandleToTargetMap.set(key, target);
 }
 
-// The mapping between ReactNativeElement and their corresponding shadow node
-// also needs to be kept here because React removes the link when unmounting.
-const targetToShadowNodeMap: WeakMap<
-  ReactNativeElement,
-  ReturnType<typeof getNativeNodeReference>,
-> = new WeakMap();
-
 const targetToTokenMap: WeakMap<
   ReactNativeElement,
   NativeIntersectionObserverToken,
 > = new WeakMap();
 
-let modernNativeIntersectionObserver =
-  NativeIntersectionObserver == null
-    ? null
-    : NativeIntersectionObserver.observeV2 == null ||
-        NativeIntersectionObserver.unobserveV2 == null
-      ? null
-      : {
-          observe: NativeIntersectionObserver.observeV2,
-          unobserve: NativeIntersectionObserver.unobserveV2,
-        };
-
-if (
-  modernNativeIntersectionObserver &&
-  !ReactNativeFeatureFlags.utilizeTokensInIntersectionObserver()
-) {
-  modernNativeIntersectionObserver = null;
-}
-
 /**
  * Registers the given intersection observer and returns a unique ID for it,
  * which is required to start observing targets.
@@ -189,34 +164,19 @@ export function observe({
   // access it even after the instance handle has been unmounted.
   setTargetForInstanceHandle(instanceHandle, target);
 
-  if (modernNativeIntersectionObserver == null) {
-    // Same for the mapping between the target and its shadow node.
-    targetToShadowNodeMap.set(target, targetNativeNodeReference);
-  }
-
   if (!isConnected) {
     NativeIntersectionObserver.connect(notifyIntersectionObservers);
     isConnected = true;
   }
 
-  if (modernNativeIntersectionObserver == null) {
-    NativeIntersectionObserver.observe({
-      intersectionObserverId,
-      rootShadowNode: rootNativeNodeReference,
-      targetShadowNode: targetNativeNodeReference,
-      thresholds: registeredObserver.observer.thresholds,
-      rootThresholds: registeredObserver.observer.rnRootThresholds,
-    });
-  } else {
-    const token = modernNativeIntersectionObserver.observe({
-      intersectionObserverId,
-      rootShadowNode: rootNativeNodeReference,
-      targetShadowNode: targetNativeNodeReference,
-      thresholds: registeredObserver.observer.thresholds,
-      rootThresholds: registeredObserver.observer.rnRootThresholds,
-    });
-    targetToTokenMap.set(target, token);
-  }
+  const token = nullthrows(NativeIntersectionObserver.observeV2)({
+    intersectionObserverId,
+    rootShadowNode: rootNativeNodeReference,
+    targetShadowNode: targetNativeNodeReference,
+    thresholds: registeredObserver.observer.thresholds,
+    rootThresholds: registeredObserver.observer.rnRootThresholds,
+  });
+  targetToTokenMap.set(target, token);
 
   return true;
 }
@@ -240,33 +200,18 @@ export function unobserve(
     return;
   }
 
-  if (modernNativeIntersectionObserver == null) {
-    const targetNativeNodeReference = targetToShadowNodeMap.get(target);
-    if (targetNativeNodeReference == null) {
-      console.error(
-        'IntersectionObserverManager: could not find registration data for target',
-      );
-      return;
-    }
-
-    NativeIntersectionObserver.unobserve(
-      intersectionObserverId,
-      targetNativeNodeReference,
-    );
-  } else {
-    const targetToken = targetToTokenMap.get(target);
-    if (targetToken == null) {
-      console.error(
-        'IntersectionObserverManager: could not find registration data for target',
-      );
-      return;
-    }
-
-    modernNativeIntersectionObserver.unobserve(
-      intersectionObserverId,
-      targetToken,
+  const targetToken = targetToTokenMap.get(target);
+  if (targetToken == null) {
+    console.error(
+      'IntersectionObserverManager: could not find registration data for target',
     );
+    return;
   }
+
+  nullthrows(NativeIntersectionObserver.unobserveV2)(
+    intersectionObserverId,
+    targetToken,
+  );
 }
 
 /**

packages/react-native/src/private/webapis/intersectionobserver/specs/NativeIntersectionObserver.js

@@ -34,10 +34,6 @@ export type NativeIntersectionObserverObserveOptions = {
 export opaque type NativeIntersectionObserverToken = mixed;
 
 export interface Spec extends TurboModule {
-  // TODO(T223605846): Remove legacy observe method
-  +observe: (options: NativeIntersectionObserverObserveOptions) => void;
-  // TODO(T223605846): Remove legacy unobserve method
-  +unobserve: (intersectionObserverId: number, targetShadowNode: mixed) => void;
   +observeV2?: (
     options: NativeIntersectionObserverObserveOptions,
   ) => NativeIntersectionObserverToken;

packages/react-native/src/private/webapis/performance/EventTiming.js

@@ -15,9 +15,11 @@ import type {
   PerformanceEntryJSON,
 } from './PerformanceEntry';
 
-import {warnNoNativePerformance} from './internals/Utilities';
 import {PerformanceEntry} from './PerformanceEntry';
-import NativePerformance from './specs/NativePerformance';
+import MaybeNativePerformance from './specs/NativePerformance';
+import nullthrows from 'nullthrows';
+
+const NativePerformance = nullthrows(MaybeNativePerformance);
 
 export type PerformanceEventTimingJSON = {
   ...PerformanceEntryJSON,
@@ -86,14 +88,8 @@ function getCachedEventCounts(): Map<string, number> {
     return cachedEventCounts;
   }
 
-  if (!NativePerformance || !NativePerformance?.getEventCounts) {
-    warnNoNativePerformance();
-    cachedEventCounts = new Map();
-    return cachedEventCounts;
-  }
-
   const eventCounts = new Map<string, number>(
-    NativePerformance.getEventCounts?.() ?? [],
+    NativePerformance.getEventCounts() ?? [],
   );
   cachedEventCounts = eventCounts;
 

packages/react-native/src/private/webapis/performance/Performance.js

@@ -35,8 +35,9 @@ import {
 } from './internals/Utilities';
 import MemoryInfo from './MemoryInfo';
 import ReactNativeStartupTiming from './ReactNativeStartupTiming';
-import NativePerformance from './specs/NativePerformance';
+import MaybeNativePerformance from './specs/NativePerformance';
 import {PerformanceMark, PerformanceMeasure} from './UserTiming';
+import nullthrows from 'nullthrows';
 
 export type PerformanceMeasureOptions =
   | $ReadOnly<{
@@ -58,11 +59,13 @@ export type PerformanceMeasureOptions =
 const ENTRY_TYPES_AVAILABLE_FROM_TIMELINE: $ReadOnlyArray<PerformanceEntryType> =
   ['mark', 'measure'];
 
-const cachedReportMark = NativePerformance?.reportMark;
-const cachedReportMeasure = NativePerformance?.reportMeasure;
-const cachedGetMarkTime = NativePerformance?.getMarkTime;
-const cachedNativeClearMarks = NativePerformance?.clearMarks;
-const cachedNativeClearMeasures = NativePerformance?.clearMeasures;
+const NativePerformance = nullthrows(MaybeNativePerformance);
+
+const cachedReportMark = NativePerformance.reportMark;
+const cachedReportMeasure = NativePerformance.reportMeasure;
+const cachedGetMarkTime = NativePerformance.getMarkTime;
+const cachedNativeClearMarks = NativePerformance.clearMarks;
+const cachedNativeClearMeasures = NativePerformance.clearMeasures;
 
 const MARK_OPTIONS_REUSABLE_OBJECT: {...PerformanceMarkOptions} = {
   startTime: 0,
@@ -98,53 +101,46 @@ export default class Performance {
 
   // Get the current JS memory information.
   get memory(): MemoryInfo {
-    if (NativePerformance?.getSimpleMemoryInfo) {
-      // JSI API implementations may have different variants of names for the JS
-      // heap information we need here. We will parse the result based on our
-      // guess of the implementation for now.
-      const memoryInfo = NativePerformance.getSimpleMemoryInfo();
-      if (memoryInfo.hasOwnProperty('hermes_heapSize')) {
-        // We got memory information from Hermes
-        const {
-          hermes_heapSize: totalJSHeapSize,
-          hermes_allocatedBytes: usedJSHeapSize,
-        } = memoryInfo;
+    // JSI API implementations may have different variants of names for the JS
+    // heap information we need here. We will parse the result based on our
+    // guess of the implementation for now.
+    const memoryInfo = NativePerformance.getSimpleMemoryInfo();
+    if (memoryInfo.hasOwnProperty('hermes_heapSize')) {
+      // We got memory information from Hermes
+      const {
+        hermes_heapSize: totalJSHeapSize,
+        hermes_allocatedBytes: usedJSHeapSize,
+      } = memoryInfo;
 
-        return new MemoryInfo({
-          jsHeapSizeLimit: null, // We don't know the heap size limit from Hermes.
-          totalJSHeapSize,
-          usedJSHeapSize,
-        });
-      } else {
-        // JSC and V8 has no native implementations for memory information in JSI::Instrumentation
-        return new MemoryInfo();
-      }
+      return new MemoryInfo({
+        jsHeapSizeLimit: null, // We don't know the heap size limit from Hermes.
+        totalJSHeapSize,
+        usedJSHeapSize,
+      });
+    } else {
+      // JSC and V8 has no native implementations for memory information in JSI::Instrumentation
+      return new MemoryInfo();
     }
-
-    return new MemoryInfo();
   }
 
   // Startup metrics is not used in web, but only in React Native.
   get rnStartupTiming(): ReactNativeStartupTiming {
-    if (NativePerformance?.getReactNativeStartupTiming) {
-      const {
-        startTime,
-        endTime,
-        initializeRuntimeStart,
-        initializeRuntimeEnd,
-        executeJavaScriptBundleEntryPointStart,
-        executeJavaScriptBundleEntryPointEnd,
-      } = NativePerformance.getReactNativeStartupTiming();
-      return new ReactNativeStartupTiming({
-        startTime,
-        endTime,
-        initializeRuntimeStart,
-        initializeRuntimeEnd,
-        executeJavaScriptBundleEntryPointStart,
-        executeJavaScriptBundleEntryPointEnd,
-      });
-    }
-    return new ReactNativeStartupTiming();
+    const {
+      startTime,
+      endTime,
+      initializeRuntimeStart,
+      initializeRuntimeEnd,
+      executeJavaScriptBundleEntryPointStart,
+      executeJavaScriptBundleEntryPointEnd,
+    } = NativePerformance.getReactNativeStartupTiming();
+    return new ReactNativeStartupTiming({
+      startTime,
+      endTime,
+      initializeRuntimeStart,
+      initializeRuntimeEnd,
+      executeJavaScriptBundleEntryPointStart,
+      executeJavaScriptBundleEntryPointEnd,
+    });
   }
 
   mark(
@@ -217,11 +213,6 @@ export default class Performance {
   }
 
   clearMarks(markName?: string): void {
-    if (!cachedNativeClearMarks) {
-      warnNoNativePerformance();
-      return;
-    }
-
     cachedNativeClearMarks(markName);
   }
 
@@ -414,11 +405,6 @@ export default class Performance {
   }
 
   clearMeasures(measureName?: string): void {
-    if (!cachedNativeClearMeasures) {
-      warnNoNativePerformance();
-      return;
-    }
-
     cachedNativeClearMeasures(measureName);
   }
 
@@ -434,10 +420,6 @@ export default class Performance {
    * https://www.w3.org/TR/performance-timeline/#extensions-to-the-performance-interface
    */
   getEntries(): PerformanceEntryList {
-    if (!NativePerformance?.getEntries) {
-      warnNoNativePerformance();
-      return [];
-    }
     return NativePerformance.getEntries().map(rawToPerformanceEntry);
   }
 
@@ -450,11 +432,6 @@ export default class Performance {
       return [];
     }
 
-    if (!NativePerformance?.getEntriesByType) {
-      warnNoNativePerformance();
-      return [];
-    }
-
     return NativePerformance.getEntriesByType(
       performanceEntryTypeToRaw(entryType),
     ).map(rawToPerformanceEntry);
@@ -472,11 +449,6 @@ export default class Performance {
       return [];
     }
 
-    if (!NativePerformance?.getEntriesByName) {
-      warnNoNativePerformance();
-      return [];
-    }
-
     return NativePerformance.getEntriesByName(
       entryName,
       entryType != null ? performanceEntryTypeToRaw(entryType) : undefined,

packages/react-native/src/private/webapis/performance/PerformanceObserver.js

@@ -21,12 +21,13 @@ import {
   rawToPerformanceEntry,
   rawToPerformanceEntryType,
 } from './internals/RawPerformanceEntry';
-import {warnNoNativePerformance} from './internals/Utilities';
-import NativePerformance from './specs/NativePerformance';
+import MaybeNativePerformance from './specs/NativePerformance';
 import nullthrows from 'nullthrows';
 
 export {PerformanceEntry} from './PerformanceEntry';
 
+const NativePerformance = nullthrows(MaybeNativePerformance);
+
 export class PerformanceObserverEntryList {
   #entries: PerformanceEntryList;
 
@@ -75,13 +76,6 @@ export interface PerformanceObserverInit {
 }
 
 function getSupportedPerformanceEntryTypes(): $ReadOnlyArray<PerformanceEntryType> {
-  if (!NativePerformance) {
-    return Object.freeze([]);
-  }
-  if (!NativePerformance.getSupportedPerformanceEntryTypes) {
-    // fallback if getSupportedPerformanceEntryTypes is not defined on native side
-    return Object.freeze(['mark', 'measure', 'event']);
-  }
   return Object.freeze(
     NativePerformance.getSupportedPerformanceEntryTypes().map(
       rawToPerformanceEntryType,
@@ -120,11 +114,6 @@ export class PerformanceObserver {
   }
 
   observe(options: PerformanceObserverInit): void {
-    if (!NativePerformance || NativePerformance.observe == null) {
-      warnNoNativePerformance();
-      return;
-    }
-
     this.#validateObserveOptions(options);
 
     if (this.#nativeObserverHandle == null) {
@@ -135,12 +124,12 @@ export class PerformanceObserver {
 
     if (options.entryTypes) {
       this.#type = 'multiple';
-      NativePerformance.observe?.(observerHandle, {
+      NativePerformance.observe(observerHandle, {
         entryTypes: options.entryTypes.map(performanceEntryTypeToRaw),
       });
     } else if (options.type) {
       this.#type = 'single';
-      NativePerformance.observe?.(observerHandle, {
+      NativePerformance.observe(observerHandle, {
         type: performanceEntryTypeToRaw(options.type),
         buffered: options.buffered,
         durationThreshold: options.durationThreshold,
@@ -149,12 +138,7 @@ export class PerformanceObserver {
   }
 
   disconnect(): void {
-    if (!NativePerformance) {
-      warnNoNativePerformance();
-      return;
-    }
-
-    if (this.#nativeObserverHandle == null || !NativePerformance.disconnect) {
+    if (this.#nativeObserverHandle == null) {
       return;
     }
 
@@ -162,16 +146,11 @@ export class PerformanceObserver {
   }
 
   #createNativeObserver(): OpaqueNativeObserverHandle | null {
-    if (!NativePerformance || !NativePerformance.createObserver) {
-      warnNoNativePerformance();
-      return null;
-    }
-
     this.#calledAtLeastOnce = false;
 
     const observerHandle: OpaqueNativeObserverHandle =
       NativePerformance.createObserver(() => {
-        const rawEntries = NativePerformance.takeRecords?.(
+        const rawEntries = NativePerformance.takeRecords(
           observerHandle,
           true, // sort records
         );
@@ -185,7 +164,7 @@ export class PerformanceObserver {
         let droppedEntriesCount = 0;
         if (!this.#calledAtLeastOnce) {
           droppedEntriesCount =
-            NativePerformance.getDroppedEntriesCount?.(observerHandle) ?? 0;
+            NativePerformance.getDroppedEntriesCount(observerHandle);
           this.#calledAtLeastOnce = true;
         }
 

packages/react-native/src/private/webapis/performance/UserTiming.js

@@ -11,11 +11,19 @@
 // flowlint unsafe-getters-setters:off
 
 import type {DOMHighResTimeStamp} from './PerformanceEntry';
+import type {
+  ExtensionMarkerPayload,
+  ExtensionTrackEntryPayload,
+} from './UserTimingExtensibility';
 
 import {getCurrentTimeStamp} from './internals/Utilities';
 import {PerformanceEntry} from './PerformanceEntry';
 
-export type DetailType = mixed;
+export type DetailType =
+  | mixed
+  // This will effectively ignored by Flow (mixed | anything = mixed)
+  // but we'll use it as documentation for how to use the extensibility API.
+  | {devtools?: ExtensionMarkerPayload | ExtensionTrackEntryPayload, ...};
 
 export type PerformanceMarkOptions = $ReadOnly<{
   detail?: DetailType,

packages/react-native/src/private/webapis/performance/UserTimingExtensibility.js.flow

@@ -0,0 +1,38 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ * @format
+ */
+
+export type DevToolsColor =
+  | 'primary'
+  | 'primary-light'
+  | 'primary-dark'
+  | 'secondary'
+  | 'secondary-light'
+  | 'secondary-dark'
+  | 'tertiary'
+  | 'tertiary-light'
+  | 'tertiary-dark'
+  | 'warning'
+  | 'error';
+
+export interface ExtensionTrackEntryPayload {
+  dataType?: 'track-entry'; // Defaults to "track-entry"
+  color?: DevToolsColor; // Defaults to "primary"
+  track: string; // Required: Name of the custom track
+  trackGroup?: string; // Optional: Group for organizing tracks
+  properties?: Array<[string, string]>; // Key-value pairs for detailed view
+  tooltipText?: string; // Short description for tooltip
+}
+
+export interface ExtensionMarkerPayload {
+  dataType: 'marker'; // Required: Identifies as a marker
+  color?: DevToolsColor; // Defaults to "primary"
+  properties?: Array<[string, string]>; // Key-value pairs for detailed view
+  tooltipText?: string; // Short description for tooltip
+}

packages/react-native/src/private/webapis/performance/__tests__/EventTimingAPI-itest.js

@@ -13,7 +13,7 @@ import '@react-native/fantom/src/setUpDefaultReactNativeEnvironment';
 import type Performance from 'react-native/src/private/webapis/performance/Performance';
 import type {PerformanceObserverEntryList} from 'react-native/src/private/webapis/performance/PerformanceObserver';
 
-import NativePerformance from '../specs/NativePerformance';
+import MaybeNativePerformance from '../specs/NativePerformance';
 import * as Fantom from '@react-native/fantom';
 import nullthrows from 'nullthrows';
 import {useState} from 'react';
@@ -22,6 +22,8 @@ import setUpPerformanceObserver from 'react-native/src/private/setup/setUpPerfor
 import {PerformanceEventTiming} from 'react-native/src/private/webapis/performance/EventTiming';
 import {PerformanceObserver} from 'react-native/src/private/webapis/performance/PerformanceObserver';
 
+const NativePerformance = nullthrows(MaybeNativePerformance);
+
 setUpPerformanceObserver();
 
 declare var performance: Performance;
@@ -193,7 +195,7 @@ describe('Event Timing API', () => {
   });
 
   it('reports number of dispatched events via performance.eventCounts', () => {
-    NativePerformance?.clearEventCountsForTesting?.();
+    NativePerformance.clearEventCountsForTesting?.();
 
     const root = Fantom.createRoot();
     Fantom.runTask(() => {

packages/react-native/src/private/webapis/performance/__tests__/UserTiming-itest.js

@@ -18,8 +18,11 @@ import type {
 
 import ensureInstance from '../../../__tests__/utilities/ensureInstance';
 import DOMException from '../../errors/DOMException';
-import NativePerformance from '../specs/NativePerformance';
+import MaybeNativePerformance from '../specs/NativePerformance';
 import {PerformanceMark, PerformanceMeasure} from '../UserTiming';
+import nullthrows from 'nullthrows';
+
+const NativePerformance = nullthrows(MaybeNativePerformance);
 
 declare var performance: Performance;
 
@@ -44,7 +47,7 @@ describe('User Timing', () => {
 
   describe('mark', () => {
     it('works with default timestamp', () => {
-      NativePerformance?.setCurrentTimeStampForTesting?.(25);
+      NativePerformance.setCurrentTimeStampForTesting?.(25);
 
       const mark = performance.mark('mark-now');
 
@@ -144,7 +147,7 @@ describe('User Timing', () => {
   describe('measure', () => {
     describe('with measureOptions', () => {
       it('uses 0 as default start and now as default end', () => {
-        NativePerformance?.setCurrentTimeStampForTesting?.(25);
+        NativePerformance.setCurrentTimeStampForTesting?.(25);
 
         const measure = performance.measure('measure-with-defaults', {});
 
@@ -157,7 +160,7 @@ describe('User Timing', () => {
       });
 
       it('works with a start timestamp', () => {
-        NativePerformance?.setCurrentTimeStampForTesting?.(25);
+        NativePerformance.setCurrentTimeStampForTesting?.(25);
 
         const measure = performance.measure('measure-with-start-timestamp', {
           start: 10,
@@ -172,7 +175,7 @@ describe('User Timing', () => {
       });
 
       it('works with start mark', () => {
-        NativePerformance?.setCurrentTimeStampForTesting?.(25);
+        NativePerformance.setCurrentTimeStampForTesting?.(25);
 
         performance.mark('start-mark', {
           startTime: 10,
@@ -191,7 +194,7 @@ describe('User Timing', () => {
       });
 
       it('works with end mark', () => {
-        NativePerformance?.setCurrentTimeStampForTesting?.(25);
+        NativePerformance.setCurrentTimeStampForTesting?.(25);
 
         performance.mark('end-mark', {
           startTime: 50,
@@ -210,7 +213,7 @@ describe('User Timing', () => {
       });
 
       it('works with start mark and end mark', () => {
-        NativePerformance?.setCurrentTimeStampForTesting?.(25);
+        NativePerformance.setCurrentTimeStampForTesting?.(25);
 
         performance.mark('start-mark', {
           startTime: 10,
@@ -375,7 +378,7 @@ describe('User Timing', () => {
 
     describe('with startMark / endMark', () => {
       it('uses 0 as default start and now as default end', () => {
-        NativePerformance?.setCurrentTimeStampForTesting?.(25);
+        NativePerformance.setCurrentTimeStampForTesting?.(25);
 
         const measure = performance.measure('measure-with-defaults');
 
@@ -388,7 +391,7 @@ describe('User Timing', () => {
       });
 
       it('works with startMark', () => {
-        NativePerformance?.setCurrentTimeStampForTesting?.(25);
+        NativePerformance.setCurrentTimeStampForTesting?.(25);
 
         performance.mark('start-mark', {
           startTime: 10,
@@ -408,7 +411,7 @@ describe('User Timing', () => {
       });
 
       it('works with startMark and endMark', () => {
-        NativePerformance?.setCurrentTimeStampForTesting?.(25);
+        NativePerformance.setCurrentTimeStampForTesting?.(25);
 
         performance.mark('start-mark', {
           startTime: 10,

packages/react-native/src/private/webapis/performance/specs/NativePerformance.js

@@ -53,7 +53,7 @@ export type PerformanceObserverInit = {
 };
 
 export interface Spec extends TurboModule {
-  +now?: () => number;
+  +now: () => number;
   +reportMark?: (name: string, startTime: number, entry: mixed) => void;
   +reportMeasure?: (
     name: string,
@@ -62,36 +62,36 @@ export interface Spec extends TurboModule {
     entry: mixed,
   ) => void;
   +getMarkTime?: (name: string) => ?number;
-  +clearMarks?: (entryName?: string) => void;
-  +clearMeasures?: (entryName?: string) => void;
-  +getEntries?: () => $ReadOnlyArray<RawPerformanceEntry>;
-  +getEntriesByName?: (
+  +clearMarks: (entryName?: string) => void;
+  +clearMeasures: (entryName?: string) => void;
+  +getEntries: () => $ReadOnlyArray<RawPerformanceEntry>;
+  +getEntriesByName: (
     entryName: string,
     entryType?: ?RawPerformanceEntryType,
   ) => $ReadOnlyArray<RawPerformanceEntry>;
-  +getEntriesByType?: (
+  +getEntriesByType: (
     entryType: RawPerformanceEntryType,
   ) => $ReadOnlyArray<RawPerformanceEntry>;
-  +getEventCounts?: () => $ReadOnlyArray<[string, number]>;
+  +getEventCounts: () => $ReadOnlyArray<[string, number]>;
   +getSimpleMemoryInfo: () => NativeMemoryInfo;
   +getReactNativeStartupTiming: () => ReactNativeStartupTiming;
 
-  +createObserver?: (
+  +createObserver: (
     callback: NativeBatchedObserverCallback,
   ) => OpaqueNativeObserverHandle;
-  +getDroppedEntriesCount?: (observer: OpaqueNativeObserverHandle) => number;
+  +getDroppedEntriesCount: (observer: OpaqueNativeObserverHandle) => number;
 
-  +observe?: (
+  +observe: (
     observer: OpaqueNativeObserverHandle,
     options: PerformanceObserverInit,
   ) => void;
-  +disconnect?: (observer: OpaqueNativeObserverHandle) => void;
-  +takeRecords?: (
+  +disconnect: (observer: OpaqueNativeObserverHandle) => void;
+  +takeRecords: (
     observer: OpaqueNativeObserverHandle,
     sort: boolean,
   ) => $ReadOnlyArray<RawPerformanceEntry>;
 
-  +getSupportedPerformanceEntryTypes?: () => $ReadOnlyArray<RawPerformanceEntryType>;
+  +getSupportedPerformanceEntryTypes: () => $ReadOnlyArray<RawPerformanceEntryType>;
 
   +setCurrentTimeStampForTesting?: (timeStamp: number) => void;
   +clearEventCountsForTesting?: () => void;

packages/react-native/third-party-podspecs/replace_dependencies_version.js

@@ -67,6 +67,25 @@ function replaceRNDepsConfiguration(
 
   console.log('Extracting the tarball', tarballURLPath);
   execSync(`tar -xf ${tarballURLPath} -C ${finalLocation}`);
+
+  // Now we need to remove the extra third-party folder as we do in the podspec's prepare-script
+  // We need to take the ReactNativeDependencies.xcframework folder and move it up one level
+  // from ${finalLocation}/packages/react-native/third-party/ to ${finalLocation}/packages/react-native/
+  console.log('Resolving ReactNativeDependencies.xcframework folder structure');
+  const thirdPartyPath = `${finalLocation}/packages/react-native/third-party`;
+  const sourcePath = `${thirdPartyPath}/ReactNativeDependencies.xcframework`;
+  const destinationPath = `${finalLocation}/packages/react-native/ReactNativeDependencies.xcframework`;
+  if (fs.existsSync(sourcePath)) {
+    fs.renameSync(sourcePath, destinationPath);
+  } else {
+    throw new Error(
+      `Expected ReactNativeDependencies.xcframework to be at ${sourcePath}, but it was not found.`,
+    );
+  }
+
+  if (fs.existsSync(thirdPartyPath)) {
+    fs.rmSync(thirdPartyPath, {force: true, recursive: true});
+  }
 }
 
 function updateLastBuildConfiguration(configuration /*: string */) {

packages/rn-tester/android/app/src/debug/AndroidManifest.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
-
-    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
-
-    <application android:usesCleartextTraffic="true" tools:targetApi="28" tools:ignore="GoogleAppIndexingWarning" />
-</manifest>

packages/rn-tester/android/app/src/main/AndroidManifest.xml

@@ -50,6 +50,7 @@
     </queries>
 
     <application
+        android:usesCleartextTraffic="${usesCleartextTraffic}"
         android:name=".RNTesterApplication"
         android:allowBackup="true"
         android:banner="@drawable/tv_banner"

packages/rn-tester/js/examples/Accessibility/AccessibilityAndroidExample.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import RNTesterBlock from '../../components/RNTesterBlock';
 import RNTesterPage from '../../components/RNTesterPage';
 import RNTesterText from '../../components/RNTesterText';
@@ -282,4 +284,4 @@ exports.examples = [
       return <AccessibilityAndroidExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Accessibility/AccessibilityExample.js

@@ -10,6 +10,7 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {EventSubscription, GestureResponderEvent} from 'react-native';
 
 import RNTesterBlock from '../../components/RNTesterBlock';
@@ -2250,4 +2251,4 @@ exports.examples = [
       return <LabelCooptingExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Accessibility/AccessibilityIOSExample.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 const {RNTesterThemeContext} = require('../../components/RNTesterTheme');
 const React = require('react');
 const {Alert, Text, View} = require('react-native');
@@ -83,4 +85,4 @@ exports.examples = [
       return <AccessibilityIOSExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/ActionSheetIOS/ActionSheetIOSExample.js

@@ -10,6 +10,7 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {HostInstance} from 'react-native';
 
 import {RNTesterThemeContext} from '../../components/RNTesterTheme';
@@ -573,4 +574,4 @@ exports.examples = [
       return <ShareScreenshotAnchorExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/AnimatedGratuitousApp/AnExApp.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import AnExSet from './AnExSet';
 import React from 'react';
 import {
@@ -396,4 +398,4 @@ exports.examples = [
       return <AnExApp />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Appearance/AppearanceExample.js

@@ -8,6 +8,7 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {ColorSchemeName} from 'react-native';
 
 import RNTesterText from '../../components/RNTesterText';
@@ -245,4 +246,4 @@ exports.examples = [
       return <ToggleNativeAppearance />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/BoxShadow/BoxShadowExample.js

@@ -8,6 +8,8 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import * as React from 'react';
 import {Image, StyleSheet, View} from 'react-native';
 
@@ -191,4 +193,4 @@ exports.examples = [
       );
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Button/ButtonExample.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 const {RNTesterThemeContext} = require('../../components/RNTesterTheme');
 const React = require('react');
 const {Alert, Button, StyleSheet, View} = require('react-native');
@@ -221,7 +223,7 @@ exports.examples = [
       );
     },
   },
-];
+] as Array<RNTesterModuleExample>;
 
 const styles = StyleSheet.create({
   container: {

packages/rn-tester/js/examples/ContentURLAndroid/ContentURLAndroid.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import RNTesterBlock from '../../components/RNTesterBlock';
 import RNTesterPage from '../../components/RNTesterPage';
 import RNTesterText from '../../components/RNTesterText';
@@ -116,4 +118,4 @@ exports.examples = [
       return <ContentURLAndroidExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Crash/CrashExample.js

@@ -8,6 +8,7 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {Node} from 'react';
 
 import React from 'react';
@@ -37,4 +38,4 @@ exports.examples = [
       );
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Cursor/CursorExample.js

@@ -8,6 +8,8 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import * as React from 'react';
 import {StyleSheet, Text, View} from 'react-native';
 
@@ -107,4 +109,4 @@ exports.examples = [
     description: 'Views with a cursor do not get flattened',
     render: CursorExampleViewFlattening,
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/DevSettings/DevSettingsExample.js

@@ -8,6 +8,8 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import * as React from 'react';
 import {Alert, Button, DevSettings} from 'react-native';
 
@@ -44,4 +46,4 @@ exports.examples = [
       );
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Dimensions/DimensionsExample.js

@@ -8,6 +8,8 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import RNTesterText from '../../components/RNTesterText';
 import React, {useEffect, useState} from 'react';
 import {Dimensions, useWindowDimensions} from 'react-native';
@@ -60,4 +62,4 @@ exports.examples = [
       return <DimensionsSubscription dim="screen" />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/DrawerLayoutAndroid/DrawerLayoutAndroidExample.js

@@ -10,6 +10,7 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {Node} from 'react';
 
 import {RNTesterThemeContext} from '../../components/RNTesterTheme';
@@ -104,4 +105,4 @@ exports.examples = [
       return <Drawer />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/FabricInteropLayer/FabricInteropLayer.js

@@ -9,6 +9,7 @@
  */
 
 'use strict';
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {ViewProps} from 'react-native';
 
 import React, {useState} from 'react';
@@ -155,4 +156,4 @@ exports.examples = [
       return <AddChildrenForInteropLayer testID="add-children" />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/FocusEventsExample/FocusEventsExample.android.js

@@ -8,6 +8,8 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import RNTesterText from '../../components/RNTesterText';
 import {useState} from 'react';
 import {Alert, Pressable, StyleSheet, TextInput, View} from 'react-native';
@@ -184,5 +186,5 @@ export default {
         return <PressableExample />;
       },
     },
-  ],
+  ] as Array<RNTesterModuleExample>,
 };

packages/rn-tester/js/examples/InputAccessoryView/InputAccessoryViewExample.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import {useTheme} from '../../components/RNTesterTheme';
 import {useState} from 'react';
 import {
@@ -111,4 +113,4 @@ exports.examples = [
       return <InputAccessoryViewExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/InvalidProps/InvalidPropsExample.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import RNTesterText from '../../components/RNTesterText';
 import * as React from 'react';
 import {View} from 'react-native';
@@ -19,7 +21,7 @@ export const category = 'Other';
 export const description =
   'Examples of passing invalid prop values and how they fall back to expected defaults.';
 
-export const examples = [
+export const examples: Array<RNTesterModuleExample> = [
   {
     title: 'View flex',
     render(): React.Node {

packages/rn-tester/js/examples/JSResponderHandlerExample/JSResponderHandlerExample.js

@@ -8,6 +8,8 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import RNTesterText from '../../components/RNTesterText';
 import React from 'react';
 import {PanResponder, ScrollView, StyleSheet, View} from 'react-native';
@@ -60,7 +62,7 @@ exports.examples = [
       );
     },
   },
-];
+] as Array<RNTesterModuleExample>;
 
 const styles = StyleSheet.create({
   container: {

packages/rn-tester/js/examples/KeyboardAvoidingView/KeyboardAvoidingViewExample.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import React, {useState} from 'react';
 import {
   Alert,
@@ -276,4 +278,4 @@ exports.examples = [
       return <KeyboardAvoidingContentContainerStyle />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Layout/LayoutAnimationExample.js

@@ -10,6 +10,8 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import RNTesterText from '../../components/RNTesterText';
 import React from 'react';
 import {
@@ -389,4 +391,4 @@ exports.examples = [
       return <LayoutUpdateExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Layout/LayoutEventsExample.js

@@ -10,6 +10,7 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {
   ViewLayout,
   ViewLayoutEvent,
@@ -163,4 +164,4 @@ exports.examples = [
       return <LayoutEventExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Layout/LayoutExample.js

@@ -10,6 +10,7 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {ViewStyleProp} from 'react-native/Libraries/StyleSheet/StyleSheet';
 
 import RNTesterBlock from '../../components/RNTesterBlock';
@@ -210,4 +211,4 @@ exports.examples = [
       return <LayoutExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/LinearGradient/LinearGradientExample.js

@@ -10,6 +10,7 @@
 
 'use strict';
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
 import type {ViewStyleProp} from 'react-native/Libraries/StyleSheet/StyleSheet';
 
 import RNTesterText from '../../components/RNTesterText';
@@ -305,4 +306,4 @@ exports.examples = [
       );
     },
   },
-];
+] as Array<RNTesterModuleExample>;

packages/rn-tester/js/examples/Linking/LinkingExample.js

@@ -8,6 +8,8 @@
  * @format
  */
 
+import type {RNTesterModuleExample} from '../../types/RNTesterTypes';
+
 import RNTesterBlock from '../../components/RNTesterBlock';
 import RNTesterText from '../../components/RNTesterText';
 import React from 'react';
@@ -168,4 +170,4 @@ exports.examples = [
       return <OpenSettingsExample />;
     },
   },
-];
+] as Array<RNTesterModuleExample>;