Integrate 0.83.0-nightly-20250917-18cb4edfa

change/@office-iss-react-native-win32-9daf089d-fac0-4026-a8e0-30b39817cbc3.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Integrate 0.83.0-nightly-20250917-18cb4edfa",
+  "packageName": "@office-iss/react-native-win32",
+  "email": "66076509+vineethkuttan@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}

change/@react-native-windows-automation-channel-ab4f18d2-84ab-4a21-9c52-d0f30180636f.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Integrate 0.83.0-nightly-20250917-18cb4edfa",
+  "packageName": "@react-native-windows/automation-channel",
+  "email": "66076509+vineethkuttan@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}

change/react-native-windows-887fac2c-05c0-47f8-a7af-693074e3f0ed.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Integrate 0.83.0-nightly-20250917-18cb4edfa",
+  "packageName": "react-native-windows",
+  "email": "66076509+vineethkuttan@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}

packages/@office-iss/react-native-win32-tester/overrides.json

@@ -5,7 +5,7 @@
   "excludePatterns": [
     "src/js/examples-win32/**"
   ],
-  "baseVersion": "0.82.0-nightly-20250902-9731e8ebc",
+  "baseVersion": "0.83.0-nightly-20250917-18cb4edfa",
   "overrides": [
     {
       "type": "patch",
@@ -42,7 +42,7 @@
       "type": "derived",
       "file": "src/js/utils/RNTesterList.win32.js",
       "baseFile": "packages/rn-tester/js/utils/RNTesterList.android.js",
-      "baseHash": "8cd219abae140e98f9578432954fc9ef62421308"
+      "baseHash": "aeb0275507e7c508cdf7c2ceec49f9e95ef4e1ec"
     }
   ]
 }

packages/@office-iss/react-native-win32-tester/package.json

@@ -19,7 +19,7 @@
   "peerDependencies": {
     "@office-iss/react-native-win32": "^0.0.0-canary.305",
     "react": "19.1.1",
-    "react-native": "0.82.0-nightly-20250902-9731e8ebc"
+    "react-native": "0.83.0-nightly-20250917-18cb4edfa"
   },
   "devDependencies": {
     "@office-iss/react-native-win32": "^0.0.0-canary.305",
@@ -30,11 +30,11 @@
     "@types/node": "^22.14.0",
     "eslint": "^8.19.0",
     "just-scripts": "^1.3.3",
-    "react-native": "0.82.0-nightly-20250902-9731e8ebc",
+    "react-native": "0.83.0-nightly-20250917-18cb4edfa",
     "react-native-platform-override": "0.0.0-canary.1019",
     "typescript": "5.0.4"
   },
   "engines": {
     "node": ">= 22"
   }
-}
+}

packages/@office-iss/react-native-win32-tester/src/js/utils/RNTesterList.win32.js

@@ -364,6 +364,16 @@ const APIs: Array<RNTesterModuleInfo> = ([
     category: 'Basic',
     module: require('../examples/TurboModule/TurboCxxModuleExample'),
   },
+  // Basic check to detect the availability of the modern Performance API.
+  ...(typeof performance.getEntries === 'function'
+    ? [
+        {
+          key: 'PerformanceApiExample',
+          category: 'Basic',
+          module: require('../examples/Performance/PerformanceApiExample'),
+        },
+      ]
+    : []),
   ...RNTesterListFbInternal.APIs,
 ]: Array<?RNTesterModuleInfo>).filter(Boolean);
 

packages/@office-iss/react-native-win32/.flowconfig

@@ -175,4 +175,4 @@ untyped-import
 untyped-type-import
 
 [version]
-^0.280.0
+^0.281.0

packages/@office-iss/react-native-win32/overrides.json

@@ -7,19 +7,19 @@
     "**/__snapshots__/**",
     "src-win/rntypes/**"
   ],
-  "baseVersion": "0.82.0-nightly-20250902-9731e8ebc",
+  "baseVersion": "0.83.0-nightly-20250917-18cb4edfa",
   "overrides": [
     {
       "type": "derived",
       "file": ".flowconfig",
       "baseFile": ".flowconfig",
-      "baseHash": "c8bd25d4aa75328a2484c5c7b0b768c188a50b52"
+      "baseHash": "8a6739338afdae4cbcfad614e33e66ae2948f497"
     },
     {
       "type": "derived",
       "file": "src-win/index.win32.js",
       "baseFile": "packages/react-native/index.js",
-      "baseHash": "88aa62f2d86a810631bcbc871f45c28c53fceec7"
+      "baseHash": "02a8ea6efd164de036681159f18135cc3393cb21"
     },
     {
       "type": "platform",
@@ -394,7 +394,7 @@
       "type": "patch",
       "file": "src-win/Libraries/Renderer/shims/ReactNativeTypes.win32.js",
       "baseFile": "packages/react-native/Libraries/Renderer/shims/ReactNativeTypes.js",
-      "baseHash": "9e91759d01c9a6d459c5781b357533f4ac8727a7",
+      "baseHash": "333afc05f5a42a5321196f5f7a14d14c8fd5dd0f",
       "issue": 0
     },
     {
@@ -431,7 +431,7 @@
       "type": "derived",
       "file": "src-win/Libraries/Text/TextNativeComponent.win32.js",
       "baseFile": "packages/react-native/Libraries/Text/TextNativeComponent.js",
-      "baseHash": "259a625b5f7cf3a70ecd4af6388d82d47f446e50",
+      "baseHash": "56a99244e10bd1833a3d048f2476c4500f59202d",
       "issue": 7074
     },
     {

packages/@office-iss/react-native-win32/package.json

@@ -30,13 +30,13 @@
     "@react-native-community/cli-platform-android": "20.0.0",
     "@react-native-community/cli-platform-ios": "20.0.0",
     "@react-native/assets": "1.0.0",
-    "@react-native/assets-registry": "0.82.0-nightly-20250902-9731e8ebc",
-    "@react-native/codegen": "0.82.0-nightly-20250902-9731e8ebc",
-    "@react-native/community-cli-plugin": "0.82.0-nightly-20250902-9731e8ebc",
-    "@react-native/gradle-plugin": "0.82.0-nightly-20250902-9731e8ebc",
-    "@react-native/js-polyfills": "0.82.0-nightly-20250902-9731e8ebc",
-    "@react-native/normalize-colors": "0.82.0-nightly-20250902-9731e8ebc",
-    "@react-native/virtualized-lists": "0.82.0-nightly-20250902-9731e8ebc",
+    "@react-native/assets-registry": "0.83.0-nightly-20250917-18cb4edfa",
+    "@react-native/codegen": "0.83.0-nightly-20250917-18cb4edfa",
+    "@react-native/community-cli-plugin": "0.83.0-nightly-20250917-18cb4edfa",
+    "@react-native/gradle-plugin": "0.83.0-nightly-20250917-18cb4edfa",
+    "@react-native/js-polyfills": "0.83.0-nightly-20250917-18cb4edfa",
+    "@react-native/normalize-colors": "0.83.0-nightly-20250917-18cb4edfa",
+    "@react-native/virtualized-lists": "0.83.0-nightly-20250917-18cb4edfa",
     "abort-controller": "^3.0.0",
     "anser": "^1.4.9",
     "ansi-regex": "^5.0.0",
@@ -72,7 +72,7 @@
   "devDependencies": {
     "@babel/core": "^7.25.2",
     "@babel/eslint-parser": "^7.25.1",
-    "@react-native/metro-config": "0.82.0-nightly-20250902-9731e8ebc",
+    "@react-native/metro-config": "0.83.0-nightly-20250917-18cb4edfa",
     "@rnw-scripts/babel-react-native-config": "0.0.0",
     "@rnw-scripts/eslint-config": "1.2.38",
     "@rnw-scripts/jest-out-of-tree-snapshot-resolver": "^1.1.42",
@@ -83,19 +83,19 @@
     "@types/prop-types": "15.7.1",
     "@types/react": "^19.0.0",
     "eslint": "^8.19.0",
-    "flow-bin": "^0.280.0",
+    "flow-bin": "^0.281.0",
     "jscodeshift": "^0.14.0",
     "just-scripts": "^1.3.3",
     "prettier": "2.8.8",
     "react": "19.1.1",
-    "react-native": "0.82.0-nightly-20250902-9731e8ebc",
+    "react-native": "0.83.0-nightly-20250917-18cb4edfa",
     "react-native-platform-override": "0.0.0-canary.1019",
     "typescript": "5.0.4"
   },
   "peerDependencies": {
     "@types/react": "^19.1.1",
     "react": "^19.1.1",
-    "react-native": "0.82.0-nightly-20250902-9731e8ebc"
+    "react-native": "0.83.0-nightly-20250917-18cb4edfa"
   },
   "beachball": {
     "defaultNpmTag": "canary",
@@ -112,4 +112,4 @@
   "engines": {
     "node": ">= 22"
   }
-}
+}

packages/@office-iss/react-native-win32/src-win/Libraries/Components/TextInput/TextInput.win32.js

@@ -646,9 +646,9 @@ function InternalTextInput(props: TextInputProps): React.Node {
   const {onBlur, onFocus, ...eventHandlers} = usePressability(config);
   const eventPhase = Object.freeze({Capturing: 1, Bubbling: 3});
   const _keyDown = (event: KeyEvent) => {
-    if (props.keyDownEvents && event.isPropagationStopped() !== true) {
-      // $FlowFixMe - keyDownEvents was already checked to not be undefined
-      for (const el of props.keyDownEvents) {
+    const keyDownEvents = props.keyDownEvents;
+    if (keyDownEvents != null && event.isPropagationStopped() !== true) {
+      for (const el of keyDownEvents) {
         if (
           event.nativeEvent.code === el.code &&
           event.nativeEvent.ctrlKey === Boolean(el.ctrlKey) &&
@@ -665,9 +665,9 @@ function InternalTextInput(props: TextInputProps): React.Node {
   };
 
   const _keyUp = (event: KeyEvent) => {
-    if (props.keyUpEvents && event.isPropagationStopped() !== true) {
-      // $FlowFixMe - keyDownEvents was already checked to not be undefined
-      for (const el of props.keyUpEvents) {
+    const keyUpEvents = props.keyUpEvents;
+    if (keyUpEvents != null && event.isPropagationStopped() !== true) {
+      for (const el of keyUpEvents) {
         if (
           event.nativeEvent.code === el.code &&
           event.nativeEvent.ctrlKey === Boolean(el.ctrlKey) &&
@@ -684,9 +684,9 @@ function InternalTextInput(props: TextInputProps): React.Node {
   };
 
   const _keyDownCapture = (event: KeyEvent) => {
-    if (props.keyDownEvents && event.isPropagationStopped() !== true) {
-      // $FlowFixMe - keyDownEvents was already checked to not be undefined
-      for (const el of props.keyDownEvents) {
+    const keyDownEvents = props.keyDownEvents;
+    if (keyDownEvents != null && event.isPropagationStopped() !== true) {
+      for (const el of keyDownEvents) {
         if (
           event.nativeEvent.code === el.code &&
           event.nativeEvent.ctrlKey === Boolean(el.ctrlKey) &&
@@ -703,9 +703,9 @@ function InternalTextInput(props: TextInputProps): React.Node {
   };
 
   const _keyUpCapture = (event: KeyEvent) => {
-    if (props.keyUpEvents && event.isPropagationStopped() !== true) {
-      // $FlowFixMe - keyDownEvents was already checked to not be undefined
-      for (const el of props.keyUpEvents) {
+    const keyUpEvents = props.keyUpEvents;
+    if (keyUpEvents != null && event.isPropagationStopped() !== true) {
+      for (const el of keyUpEvents) {
         if (
           event.nativeEvent.code === el.code &&
           event.nativeEvent.ctrlKey === Boolean(el.ctrlKey) &&

packages/@office-iss/react-native-win32/src-win/Libraries/Components/View/View.win32.js

@@ -112,9 +112,9 @@ const View: component(
         : undefined;
 
     const _keyDown = (event: KeyEvent) => {
-      if (otherProps.keyDownEvents && event.isPropagationStopped() !== true) {
-        // $FlowFixMe - keyDownEvents was already checked to not be undefined
-        for (const el of otherProps.keyDownEvents) {
+      const keyDownEvents = otherProps.keyDownEvents;
+      if (keyDownEvents != null && event.isPropagationStopped() !== true) {
+        for (const el of keyDownEvents) {
           if (
             event.nativeEvent.code === el.code &&
             event.nativeEvent.ctrlKey === Boolean(el.ctrlKey) &&
@@ -131,9 +131,9 @@ const View: component(
     };
 
     const _keyUp = (event: KeyEvent) => {
-      if (otherProps.keyUpEvents && event.isPropagationStopped() !== true) {
-        // $FlowFixMe - keyDownEvents was already checked to not be undefined
-        for (const el of otherProps.keyUpEvents) {
+      const keyUpEvents = otherProps.keyUpEvents;
+      if (keyUpEvents != null && event.isPropagationStopped() !== true) {
+        for (const el of keyUpEvents) {
           if (
             event.nativeEvent.code === el.code &&
             event.nativeEvent.ctrlKey === Boolean(el.ctrlKey) &&
@@ -150,9 +150,9 @@ const View: component(
     };
 
     const _keyDownCapture = (event: KeyEvent) => {
-      if (otherProps.keyDownEvents && event.isPropagationStopped() !== true) {
-        // $FlowFixMe - keyDownEvents was already checked to not be undefined
-        for (const el of otherProps.keyDownEvents) {
+      const keyDownEvents = otherProps.keyDownEvents;
+      if (keyDownEvents != null && event.isPropagationStopped() !== true) {
+        for (const el of keyDownEvents) {
           if (
             event.nativeEvent.code === el.code &&
             event.nativeEvent.ctrlKey === Boolean(el.ctrlKey) &&
@@ -169,9 +169,9 @@ const View: component(
     };
 
     const _keyUpCapture = (event: KeyEvent) => {
-      if (otherProps.keyUpEvents && event.isPropagationStopped() !== true) {
-        // $FlowFixMe - keyDownEvents was already checked to not be undefined
-        for (const el of otherProps.keyUpEvents) {
+      const keyUpEvents = otherProps.keyUpEvents;
+      if (keyUpEvents != null && event.isPropagationStopped() !== true) {
+        for (const el of keyUpEvents) {
           if (
             event.nativeEvent.code === el.code &&
             event.nativeEvent.ctrlKey === Boolean(el.ctrlKey) &&
@@ -188,11 +188,13 @@ const View: component(
     };
 
     // [Windows
-    // $FlowFixMe - children typing
-    const childrenWithImportantForAccessibility = children => {
+    const childrenWithImportantForAccessibility = (
+      children: React.Node,
+    ): React.Node => {
       return React.Children.map(children, child => {
         if (React.isValidElement(child)) {
           // $FlowFixMe[incompatible-use]
+          // $FlowFixMe[prop-missing]
           if (child.props.children) {
             // $FlowFixMe[incompatible-call] - React.Children.map types child as mixed
             // $FlowFixMe[incompatible-type]

packages/@office-iss/react-native-win32/src-win/Libraries/Pressability/Pressability.win32.js

@@ -603,9 +603,9 @@ export default class Pressability {
           this._isKeyDown
         ) {
           const {onPressOut, onPress} = this._config;
-          // $FlowFixMe: PressEvents don't mesh with keyboarding APIs. Keep legacy behavior of passing KeyEvents instead
+          // $FlowFixMe[incompatible-type] PressEvents don't mesh with keyboarding APIs. Keep legacy behavior of passing KeyEvents instead
           onPressOut && onPressOut(event);
-          // $FlowFixMe: PressEvents don't mesh with keyboarding APIs. Keep legacy behavior of passing KeyEvents instead
+          // $FlowFixMe[incompatible-type] PressEvents don't mesh with keyboarding APIs. Keep legacy behavior of passing KeyEvents instead
           onPress && onPress(event);
         }
         // Native windows app clears the key pressed state when another key press interrupts the current
@@ -623,7 +623,7 @@ export default class Pressability {
         ) {
           const {onPressIn} = this._config;
           this._isKeyDown = true;
-          // $FlowFixMe: PressEvents don't mesh with keyboarding APIs. Keep legacy behavior of passing KeyEvents instead
+          // $FlowFixMe[incompatible-type] PressEvents don't mesh with keyboarding APIs. Keep legacy behavior of passing KeyEvents instead
           onPressIn && onPressIn(event);
         }
       },
@@ -788,8 +788,8 @@ export default class Pressability {
   }
 
   // [Win32]
-  // $FlowFixMe - button typing
-  _isDefaultPressButton(button): boolean {
+  // $FlowFixMe[unclear-type] - button typing
+  _isDefaultPressButton(button: any): boolean {
     return !button; // Treat 0 or undefined as default press
   }
 

packages/@office-iss/react-native-win32/src-win/Libraries/ReactNative/PaperUIManager.win32.js

@@ -101,22 +101,22 @@ const UIManagerJS: UIManagerJSInterface = {
 for (const propName of Object.getOwnPropertyNames(
   Object.getPrototypeOf(NativeUIManager),
 )) {
-  // $FlowFixMe
+  // $FlowFixMe[incompatible-type]
   UIManagerJS[propName] = NativeUIManager[propName];
 }
 // Windows]
 
-/* $FlowFixMe(>=0.123.0 site=react_native_fb) This comment suppresses an error
+/* $FlowFixMe[cannot-write] (>=0.123.0 site=react_native_fb) This comment suppresses an error
  * found when Flow v0.123.0 was deployed. To see the error, delete this comment
  * and run Flow. */
 //const UIManagerJS = {
 //  ...NativeUIManager,
-// $FlowFixMe
+// $FlowFixMe[cannot-write]
 UIManagerJS.getConstants = getConstants;
 //  },
-// $FlowFixMe
+// $FlowFixMe[cannot-write]
 UIManagerJS.getViewManagerConfig = getViewManagerConfig;
-// $FlowFixMe
+// $FlowFixMe[cannot-write]
 UIManagerJS.hasViewManagerConfig = (viewManagerName: string) =>
   getViewManagerConfig(viewManagerName) != null;
 
@@ -130,7 +130,7 @@ UIManagerJS.hasViewManagerConfig = (viewManagerName: string) =>
 //            getViewManagerConfig is implemented on the JSI object, so we don't
 //            need to hook this unless we are running in webdebugger
 if (!global.nativeCallSyncHook)
-  // $FlowFixMe
+  // $FlowFixMe[prop-missing]
   NativeUIManager.getViewManagerConfig = UIManagerJS.getViewManagerConfig;
 
 function lazifyViewManagerConfig(viewName: string) {
@@ -199,7 +199,7 @@ if (!global.nativeCallSyncHook) {
             `Accessing view manager configs directly off UIManager via UIManager['${viewManagerName}'] ` +
               `is no longer supported. Use UIManager.getViewManagerConfig('${viewManagerName}') instead.`,
           );
-          // $FlowFixMe
+          // $FlowFixMe[incompatible-return]
           return UIManagerJS.getViewManagerConfig(viewManagerName);
         },
       });