react · rubennorte · Sep 9, 2026 · Sep 9, 2026 · Sep 9, 2026 · Sep 9, 2026
diff --git a/packages/react-native/Libraries/ActionSheetIOS/ActionSheetIOS.js b/packages/react-native/Libraries/ActionSheetIOS/ActionSheetIOS.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -49,6 +49,7 @@ export type ShareActionSheetIOSOptions = Readonly<{
 export type ShareActionSheetError = Readonly<{
   domain: string,
   code: string,
+  // $FlowFixMe[unclear-type]
   userInfo?: ?Object,
   message: string,
 }>;
@@ -155,7 +156,9 @@ const ActionSheetIOS = {
    */
   showShareActionSheetWithOptions(
     options: ShareActionSheetIOSOptions,
+    // $FlowFixMe[unclear-type]
     failureCallback: Function | ((error: ShareActionSheetError) => void),
+    // $FlowFixMe[unclear-type]
     successCallback: Function | ((success: boolean, method: ?string) => void),
   ) {
     invariant(

diff --git a/packages/react-native/Libraries/Alert/Alert.js b/packages/react-native/Libraries/Alert/Alert.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -26,6 +26,7 @@ export type AlertButtonStyle = 'default' | 'cancel' | 'destructive';
 
 export type AlertButton = {
   text?: string,
+  // $FlowFixMe[unclear-type]
   onPress?: ?((value?: string) => any) | ?Function,
   isPreferred?: boolean,
   style?: AlertButtonStyle,
@@ -121,7 +122,7 @@ class Alert {
         cancelable: false,
       };
 
-      if (options && options.cancelable) {
+      if (options != null && options.cancelable === true) {
         config.cancelable = options.cancelable;
       }
       // At most three buttons (neutral, negative, positive). Ignore rest.
@@ -141,25 +142,20 @@ class Alert {
         config.buttonNegative = buttonNegative.text || '';
       }
       if (buttonPositive) {
-        config.buttonPositive = buttonPositive.text || defaultPositiveText;
+        config.buttonPositive =
+          buttonPositive.text != null && buttonPositive.text !== ''
+            ? buttonPositive.text
+            : defaultPositiveText;
       }
 
-      /* $FlowFixMe[missing-local-annot] The type annotation(s) required by
-       * Flow's LTI update could not be added via codemod */
-      const onAction = (action, buttonKey) => {
+      const onAction = (action: string, buttonKey?: number) => {
         if (action === constants.buttonClicked) {
           if (buttonKey === constants.buttonNeutral) {
-            // $FlowFixMe[incompatible-type]
-            // $FlowFixMe[incompatible-use]
-            buttonNeutral.onPress && buttonNeutral.onPress();
+            buttonNeutral?.onPress?.();
           } else if (buttonKey === constants.buttonNegative) {
-            // $FlowFixMe[incompatible-type]
-            // $FlowFixMe[incompatible-use]
-            buttonNegative.onPress && buttonNegative.onPress();
+            buttonNegative?.onPress?.();
           } else if (buttonKey === constants.buttonPositive) {
-            // $FlowFixMe[incompatible-type]
-            // $FlowFixMe[incompatible-use]
-            buttonPositive.onPress && buttonPositive.onPress();
+            buttonPositive?.onPress?.();
           }
         } else if (action === constants.dismissed) {
           options && options.onDismiss && options.onDismiss();
@@ -186,7 +182,7 @@ class Alert {
     options?: AlertOptions,
   ): void {
     if (Platform.OS === 'ios') {
-      let callbacks: Array<?any> = [];
+      let callbacks: Array<?(value: string) => unknown> = [];
       const buttons = [];
       let cancelButtonKey;
       let destructiveButtonKey;
@@ -195,16 +191,20 @@ class Alert {
         callbacks = [callbackOrButtons];
       } else if (Array.isArray(callbackOrButtons)) {
         callbackOrButtons.forEach((btn, index) => {
-          callbacks[index] = btn.onPress;
+          callbacks[index] =
+            btn.onPress == null ? null : value => btn.onPress?.(value);
           if (btn.style === 'cancel') {
             cancelButtonKey = String(index);
           } else if (btn.style === 'destructive') {
             destructiveButtonKey = String(index);
           }
-          if (btn.isPreferred) {
+          if (btn.isPreferred === true) {
             preferredButtonKey = String(index);
           }
-          if (btn.text || index < (callbackOrButtons || []).length - 1) {
+          if (
+            (btn.text != null && btn.text !== '') ||
+            index < callbackOrButtons.length - 1
+          ) {
             const btnDef: {[number]: string} = {};
             btnDef[index] = btn.text || '';
             buttons.push(btnDef);
@@ -215,7 +215,7 @@ class Alert {
       alertWithArgs(
         {
           title: title || '',
-          message: message || undefined,
+          message: message != null && message !== '' ? message : undefined,
           buttons,
           type: type || undefined,
           defaultValue,

diff --git a/packages/react-native/Libraries/Animated/AnimatedExports.js b/packages/react-native/Libraries/Animated/AnimatedExports.js
@@ -4,10 +4,12 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
+// flowlint unsafe-getters-setters:off
+
 import typeof AnimatedFlatList from './components/AnimatedFlatList';
 import typeof AnimatedImage from './components/AnimatedImage';
 import typeof AnimatedScrollView from './components/AnimatedScrollView';
@@ -27,7 +29,7 @@ export default {
   /**
    * FlatList and SectionList infer generic Type defined under their `data` and `section` props.
    */
-  get FlatList(): AnimatedFlatList<any> {
+  get FlatList(): AnimatedFlatList<> {
     return require('./components/AnimatedFlatList').default;
   },
   /**
@@ -47,7 +49,7 @@ export default {
   /**
    * FlatList and SectionList infer generic Type defined under their `data` and `section` props.
    */
-  get SectionList(): AnimatedSectionList<any, any> {
+  get SectionList(): AnimatedSectionList<> {
     return require('./components/AnimatedSectionList').default;
   },
   /**

diff --git a/packages/react-native/Libraries/Animated/AnimatedExports.js.flow b/packages/react-native/Libraries/Animated/AnimatedExports.js.flow
@@ -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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 

diff --git a/packages/react-native/Libraries/Animated/createAnimatedComponent.js b/packages/react-native/Libraries/Animated/createAnimatedComponent.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -64,10 +64,10 @@ type PassThroughProps = Readonly<{
   passthroughAnimatedPropExplicitValues?: ViewProps | null,
 }>;
 
-type LooseOmit<O extends interface {}, K extends keyof $FlowFixMe> = Pick<
-  O,
-  Exclude<keyof O, K>,
->;
+type LooseOmit<
+  O extends interface {},
+  K extends string | number | symbol,
+> = Pick<O, Exclude<keyof O, K>>;
 
 export type AnimatedProps<Props extends {...}> = LooseOmit<
   {
@@ -94,7 +94,7 @@ export type AnimatedComponentType<
 > = component(ref?: React.RefSetter<Instance>, ...AnimatedProps<Props>);
 
 export default function createAnimatedComponent<
-  TInstance extends React.ComponentType<any>,
+  TInstance extends Exclude<React.ElementType, string>,
 >(
   Component: TInstance,
 ): AnimatedComponentType<
@@ -157,9 +157,11 @@ export function unstable_createAnimatedComponentWithAllowlist<
     );
   };
 
-  AnimatedComponent.displayName = `Animated(${
-    Component.displayName || 'Anonymous'
-  })`;
+  const componentName =
+    Component.displayName != null && Component.displayName !== ''
+      ? Component.displayName
+      : 'Anonymous';
+  AnimatedComponent.displayName = `Animated(${componentName})`;
 
   return AnimatedComponent;
 }
diff --git a/packages/react-native/Libraries/Animated/nodes/AnimatedAddition.js b/packages/react-native/Libraries/Animated/nodes/AnimatedAddition.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -63,7 +63,11 @@ export default class AnimatedAddition extends AnimatedWithChildren {
     super.__detach();
   }
 
-  __getNativeConfig(): any {
+  __getNativeConfig(): {
+    type: string,
+    input: [number, number],
+    debugID: ?string,
+  } {
     return {
       type: 'addition',
       input: [this._a.__getNativeTag(), this._b.__getNativeTag()],

diff --git a/packages/react-native/Libraries/Animated/nodes/AnimatedColor.js b/packages/react-native/Libraries/Animated/nodes/AnimatedColor.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -90,19 +90,21 @@ function processColor(
   return null;
 }
 
-function isRgbaValue(value: any): boolean {
+function isRgbaValue(value: unknown): boolean {
   return (
-    value &&
+    value != null &&
+    typeof value === 'object' &&
     typeof value.r === 'number' &&
     typeof value.g === 'number' &&
     typeof value.b === 'number' &&
     typeof value.a === 'number'
   );
 }
 
-function isRgbaAnimatedValue(value: any): boolean {
+function isRgbaAnimatedValue(value: unknown): boolean {
   return (
-    value &&
+    value != null &&
+    typeof value === 'object' &&
     value.r instanceof AnimatedValue &&
     value.g instanceof AnimatedValue &&
     value.b instanceof AnimatedValue &&
@@ -325,7 +327,15 @@ export default class AnimatedColor extends AnimatedWithChildren {
     super.__makeNative(platformConfig);
   }
 
-  __getNativeConfig(): {...} {
+  __getNativeConfig(): {
+    type: string,
+    r: number,
+    g: number,
+    b: number,
+    a: number,
+    nativeColor: ?NativeColorValue,
+    debugID: ?string,
+  } {
     return {
       type: 'color',
       r: this.r.__getNativeTag(),

diff --git a/packages/react-native/Libraries/Animated/nodes/AnimatedDiffClamp.js b/packages/react-native/Libraries/Animated/nodes/AnimatedDiffClamp.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -70,7 +70,13 @@ export default class AnimatedDiffClamp extends AnimatedWithChildren {
     super.__detach();
   }
 
-  __getNativeConfig(): any {
+  __getNativeConfig(): {
+    type: string,
+    input: number,
+    min: number,
+    max: number,
+    debugID: ?string,
+  } {
     return {
       type: 'diffclamp',
       input: this._a.__getNativeTag(),

diff --git a/packages/react-native/Libraries/Animated/nodes/AnimatedDivision.js b/packages/react-native/Libraries/Animated/nodes/AnimatedDivision.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -79,7 +79,11 @@ export default class AnimatedDivision extends AnimatedWithChildren {
     super.__detach();
   }
 
-  __getNativeConfig(): any {
+  __getNativeConfig(): {
+    type: string,
+    input: [number, number],
+    debugID: ?string,
+  } {
     return {
       type: 'division',
       input: [this._a.__getNativeTag(), this._b.__getNativeTag()],

diff --git a/packages/react-native/Libraries/Animated/nodes/AnimatedModulo.js b/packages/react-native/Libraries/Animated/nodes/AnimatedModulo.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -57,7 +57,12 @@ export default class AnimatedModulo extends AnimatedWithChildren {
     super.__detach();
   }
 
-  __getNativeConfig(): any {
+  __getNativeConfig(): {
+    type: string,
+    input: number,
+    modulus: number,
+    debugID: ?string,
+  } {
     return {
       type: 'modulus',
       input: this._a.__getNativeTag(),

diff --git a/packages/react-native/Libraries/Animated/nodes/AnimatedMultiplication.js b/packages/react-native/Libraries/Animated/nodes/AnimatedMultiplication.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.
  *
- * @flow
+ * @flow strict-local
  * @format
  */
 
@@ -62,7 +62,11 @@ export default class AnimatedMultiplication extends AnimatedWithChildren {
     super.__detach();
   }
 
-  __getNativeConfig(): any {
+  __getNativeConfig(): {
+    type: string,
+    input: [number, number],
+    debugID: ?string,
+  } {
     return {
       type: 'multiplication',
       input: [this._a.__getNativeTag(), this._b.__getNativeTag()],