meta-codesync · Nov 6, 2026 · Nov 6, 2026
diff --git a/packages/asset-utils/src/AndroidPathUtils.js b/packages/asset-utils/src/AndroidPathUtils.js
@@ -20,7 +20,7 @@ export type PackagerAsset = Readonly<{
 }>;
 */
 
-const androidScaleSuffix /*: {[string]: string} */ = {
+const androidScaleSuffix /*: {[key: string]: string} */ = {
   '0.75': 'ldpi',
   '1': 'mdpi',
   '1.5': 'hdpi',

diff --git a/packages/debugger-shell/src/electron/SettingsStore.js b/packages/debugger-shell/src/electron/SettingsStore.js
@@ -91,12 +91,12 @@ export default class SettingsStore {
     }
   }
 
-  get store(): {[string]: unknown} {
+  get store(): {[key: string]: unknown} {
     try {
       const data = fs.readFileSync(this.path, 'utf8');
       const deserializedData = this._deserialize(data);
       return {
-        ...(deserializedData as any as {[string]: unknown}),
+        ...(deserializedData as any as {[key: string]: unknown}),
       };
     } catch (error) {
       if (error?.code === 'ENOENT') {

diff --git a/packages/dev-middleware/src/__tests__/InspectorDebuggerUtils.js b/packages/dev-middleware/src/__tests__/InspectorDebuggerUtils.js
@@ -25,7 +25,7 @@ export class DebuggerAgent {
   constructor(
     url: string,
     signal?: AbortSignal,
-    headers?: ?{[string]: unknown},
+    headers?: ?{[key: string]: unknown},
   ) {
     const ws = new WebSocket(url, {
       // The mock server uses a self-signed certificate.
@@ -122,7 +122,7 @@ export class DebuggerMock extends DebuggerAgent {
 export async function createDebuggerMock(
   url: string,
   signal: AbortSignal,
-  headers?: ?{[string]: unknown},
+  headers?: ?{[key: string]: unknown},
 ): Promise<DebuggerMock> {
   const debuggerMock = new DebuggerMock(url, signal, headers);
   await debuggerMock.ready();

diff --git a/packages/dev-middleware/src/__tests__/InspectorProtocolUtils.js b/packages/dev-middleware/src/__tests__/InspectorProtocolUtils.js
@@ -126,7 +126,7 @@ export async function createAndConnectTarget(
     deviceId = null,
     deviceHostHeader = null,
   }: Readonly<{
-    debuggerHeaders?: ?{[string]: unknown},
+    debuggerHeaders?: ?{[key: string]: unknown},
     debuggerOriginHeader?: ?string,
     deviceId?: ?string,
     deviceHostHeader?: ?string,

diff --git a/packages/dev-middleware/src/inspector-proxy/CdpDebugLogging.js b/packages/dev-middleware/src/inspector-proxy/CdpDebugLogging.js
@@ -39,7 +39,7 @@ function getCDPLogPrefix(destination: CDPMessageDestination): string {
 
 export default class CdpDebugLogging {
   #cdpMessagesLoggingBatchingFn: {
-    [CDPMessageDestination]: (message: string) => void,
+    [key: CDPMessageDestination]: (message: string) => void,
   } = {
     DebuggerToProxy: () => {},
     ProxyToDebugger: () => {},
@@ -55,7 +55,7 @@ export default class CdpDebugLogging {
 
   #initializeThrottledCDPMessageLogging(): void {
     const batchingCounters: {
-      [CDPMessageDestination]: {count: number, size: number},
+      [key: CDPMessageDestination]: {count: number, size: number},
     } = {
       DebuggerToProxy: {count: 0, size: 0},
       ProxyToDebugger: {count: 0, size: 0},

diff --git a/packages/dev-middleware/src/inspector-proxy/types.js b/packages/dev-middleware/src/inspector-proxy/types.js
@@ -158,7 +158,7 @@ export type JSONSerializable =
   | string
   | null
   | ReadonlyArray<JSONSerializable>
-  | {readonly [string]: JSONSerializable};
+  | {readonly [key: string]: JSONSerializable};
 
 export type DeepReadOnly<T> =
   T extends ReadonlyArray<infer V>

diff --git a/packages/jest-preset/jest/__tests__/preset-react-native-dep-test.js b/packages/jest-preset/jest/__tests__/preset-react-native-dep-test.js
@@ -76,7 +76,7 @@ test(`isolated preset loads when the consumer provides react-native (${RN_ISSUE}
     // Strip resolution-affecting env so the child is genuinely isolated:
     // inherited lookup paths can otherwise make the copy resolve more
     // than the directory layout alone provides.
-    const childEnv: {[string]: string} = {};
+    const childEnv: {[key: string]: string} = {};
     for (const key of Object.keys(process.env)) {
       if (key === 'NODE_PATH' || key === 'NODE_OPTIONS') {
         continue;

diff --git a/packages/react-native-babel-preset/src/__tests__/transform-runtime-caller-test.js b/packages/react-native-babel-preset/src/__tests__/transform-runtime-caller-test.js
@@ -18,7 +18,7 @@ const MOCK_FILENAME = '/absolute/path/to/input.js';
 
 function transformWithCaller(
   code: string,
-  options: {[string]: unknown},
+  options: {[key: string]: unknown},
   caller: {
     enableBabelRuntime?: boolean | string,
     babelRuntimeModuleName?: string,

diff --git a/packages/react-native-babel-preset/src/__tests__/transform-snapshot-test.js b/packages/react-native-babel-preset/src/__tests__/transform-snapshot-test.js
@@ -158,7 +158,7 @@ const testConfigs = [
 
 function transformCode(
   code: string,
-  options: {[string]: unknown},
+  options: {[key: string]: unknown},
 ): string | null {
   const result = babel.transformSync(code, {
     babelrc: false,
@@ -173,7 +173,7 @@ function transformCode(
 
 function transformCodeWithSourceOptimization(
   code: string,
-  options: {[string]: unknown},
+  options: {[key: string]: unknown},
 ): string | null {
   const config = preset.getPreset(code, options);
   const result = babel.transformSync(code, {
@@ -208,7 +208,10 @@ function ensureDirectoryExists(dir: string): void {
   }
 }
 
-function makeHeader(description: string, options: {[string]: unknown}): string {
+function makeHeader(
+  description: string,
+  options: {[key: string]: unknown},
+): string {
   return `/**
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  *

diff --git a/packages/react-native-codegen/src/generators/RNCodegen.js b/packages/react-native-codegen/src/generators/RNCodegen.js
@@ -77,7 +77,7 @@ export type GenerateFunction = (
 ) => FilesOutput;
 
 export type LibraryGeneratorsFunctions = Readonly<{
-  [string]: Array<GenerateFunction>,
+  [key: string]: Array<GenerateFunction>,
 }>;
 
 export type LibraryOptions = Readonly<{
@@ -92,9 +92,9 @@ export type LibraryOptions = Readonly<{
 }>;
 
 export type SchemasOptions = Readonly<{
-  schemas: {[string]: SchemaType},
+  schemas: {[key: string]: SchemaType},
   outputDirectory: string,
-  supportedApplePlatforms?: {[string]: {[string]: boolean}},
+  supportedApplePlatforms?: {[key: string]: {[key: string]: boolean}},
 }>;
 
 export type LibraryGenerators =

diff --git a/packages/react-native-codegen/src/generators/ReservedPrimitiveTypes.js b/packages/react-native-codegen/src/generators/ReservedPrimitiveTypes.js
@@ -43,83 +43,82 @@ type ReservedTypeMapping = {
   readonly java: JavaImportInfo,
 };
 
-const RESERVED_TYPES: {readonly [ReservedPrimitiveName]: ReservedTypeMapping} =
-  {
-    ColorPrimitive: {
-      cpp: {
-        typeName: 'SharedColor',
-        localIncludes: ['#include <React/Graphics.h>'],
-        conversionIncludes: [],
-      },
-      java: {
-        interfaceImports: [],
-        delegateImports: [
-          'import com.facebook.react.bridge.ColorPropConverter;',
-        ],
-      },
+const RESERVED_TYPES: {
+  readonly [key: ReservedPrimitiveName]: ReservedTypeMapping,
+} = {
+  ColorPrimitive: {
+    cpp: {
+      typeName: 'SharedColor',
+      localIncludes: ['#include <React/Graphics.h>'],
+      conversionIncludes: [],
     },
-    ImageSourcePrimitive: {
-      cpp: {
-        typeName: 'ImageSource',
-        localIncludes: ['#include <React/ImageManager.h>'],
-        conversionIncludes: ['#include <React/Image.h>'],
-      },
-      java: {
-        interfaceImports: ['import com.facebook.react.bridge.ReadableMap;'],
-        delegateImports: ['import com.facebook.react.bridge.ReadableMap;'],
-      },
+    java: {
+      interfaceImports: [],
+      delegateImports: ['import com.facebook.react.bridge.ColorPropConverter;'],
     },
-    ImageRequestPrimitive: {
-      cpp: {
-        typeName: 'ImageRequest',
-        localIncludes: ['#include <React/ImageManager.h>'],
-        conversionIncludes: [],
-      },
-      java: {
-        // ImageRequestPrimitive is not used in Java component props
-        interfaceImports: [],
-        delegateImports: [],
-      },
+  },
+  ImageSourcePrimitive: {
+    cpp: {
+      typeName: 'ImageSource',
+      localIncludes: ['#include <React/ImageManager.h>'],
+      conversionIncludes: ['#include <React/Image.h>'],
     },
-    PointPrimitive: {
-      cpp: {
-        typeName: 'Point',
-        localIncludes: ['#include <React/Graphics.h>'],
-        conversionIncludes: [],
-      },
-      java: {
-        interfaceImports: ['import com.facebook.react.bridge.ReadableMap;'],
-        delegateImports: ['import com.facebook.react.bridge.ReadableMap;'],
-      },
+    java: {
+      interfaceImports: ['import com.facebook.react.bridge.ReadableMap;'],
+      delegateImports: ['import com.facebook.react.bridge.ReadableMap;'],
     },
-    EdgeInsetsPrimitive: {
-      cpp: {
-        typeName: 'EdgeInsets',
-        localIncludes: ['#include <React/Graphics.h>'],
-        conversionIncludes: [],
-      },
-      java: {
-        interfaceImports: ['import com.facebook.react.bridge.ReadableMap;'],
-        delegateImports: ['import com.facebook.react.bridge.ReadableMap;'],
-      },
+  },
+  ImageRequestPrimitive: {
+    cpp: {
+      typeName: 'ImageRequest',
+      localIncludes: ['#include <React/ImageManager.h>'],
+      conversionIncludes: [],
     },
-    DimensionPrimitive: {
-      cpp: {
-        typeName: 'YGValue',
-        localIncludes: [
-          '#include <yoga/Yoga.h>',
-          '#include <React/RendererCore.h>',
-        ],
-        conversionIncludes: ['#include <React/View.h>'],
-      },
-      java: {
-        interfaceImports: ['import com.facebook.yoga.YogaValue;'],
-        delegateImports: [
-          'import com.facebook.react.bridge.DimensionPropConverter;',
-        ],
-      },
+    java: {
+      // ImageRequestPrimitive is not used in Java component props
+      interfaceImports: [],
+      delegateImports: [],
     },
-  };
+  },
+  PointPrimitive: {
+    cpp: {
+      typeName: 'Point',
+      localIncludes: ['#include <React/Graphics.h>'],
+      conversionIncludes: [],
+    },
+    java: {
+      interfaceImports: ['import com.facebook.react.bridge.ReadableMap;'],
+      delegateImports: ['import com.facebook.react.bridge.ReadableMap;'],
+    },
+  },
+  EdgeInsetsPrimitive: {
+    cpp: {
+      typeName: 'EdgeInsets',
+      localIncludes: ['#include <React/Graphics.h>'],
+      conversionIncludes: [],
+    },
+    java: {
+      interfaceImports: ['import com.facebook.react.bridge.ReadableMap;'],
+      delegateImports: ['import com.facebook.react.bridge.ReadableMap;'],
+    },
+  },
+  DimensionPrimitive: {
+    cpp: {
+      typeName: 'YGValue',
+      localIncludes: [
+        '#include <yoga/Yoga.h>',
+        '#include <React/RendererCore.h>',
+      ],
+      conversionIncludes: ['#include <React/View.h>'],
+    },
+    java: {
+      interfaceImports: ['import com.facebook.yoga.YogaValue;'],
+      delegateImports: [
+        'import com.facebook.react.bridge.DimensionPropConverter;',
+      ],
+    },
+  },
+};
 
 function getCppTypeForReservedPrimitive(name: ReservedPrimitiveName): string {
   return RESERVED_TYPES[name].cpp.typeName;

diff --git a/packages/react-native-codegen/src/generators/components/ComponentsProviderUtils.js b/packages/react-native-codegen/src/generators/components/ComponentsProviderUtils.js
@@ -20,7 +20,7 @@ const APPLE_PLATFORMS_MACRO_MAP = {
  */
 function generateSupportedApplePlatformsMacro(
   fileTemplate: string,
-  supportedPlatformsMap: ?{[string]: boolean},
+  supportedPlatformsMap: ?{[key: string]: boolean},
 ): string {
   if (!supportedPlatformsMap) {
     return fileTemplate;

diff --git a/...t-native-codegen/src/generators/components/GenerateThirdPartyFabricComponentsProviderH.js b/...t-native-codegen/src/generators/components/GenerateThirdPartyFabricComponentsProviderH.js
@@ -68,8 +68,8 @@ Class<RCTComponentViewProtocol> ${className}Cls(void) __attribute__((used)); //
 
 module.exports = {
   generate(
-    schemas: {[string]: SchemaType},
-    supportedApplePlatforms?: {[string]: {[string]: boolean}},
+    schemas: {[key: string]: SchemaType},
+    supportedApplePlatforms?: {[key: string]: {[key: string]: boolean}},
   ): FilesOutput {
     const fileName = 'RCTThirdPartyFabricComponentsProvider.h';
 

diff --git a/...ive-codegen/src/generators/components/GenerateThirdPartyFabricComponentsProviderObjCpp.js b/...ive-codegen/src/generators/components/GenerateThirdPartyFabricComponentsProviderObjCpp.js
@@ -65,8 +65,8 @@ const LookupMapTemplate = ({
 
 module.exports = {
   generate(
-    schemas: {[string]: SchemaType},
-    supportedApplePlatforms?: {[string]: {[string]: boolean}},
+    schemas: {[key: string]: SchemaType},
+    supportedApplePlatforms?: {[key: string]: {[key: string]: boolean}},
   ): FilesOutput {
     const fileName = 'RCTThirdPartyFabricComponentsProvider.mm';
 

diff --git a/packages/react-native-codegen/src/generators/modules/Utils.js b/packages/react-native-codegen/src/generators/modules/Utils.js
@@ -38,17 +38,16 @@ function createAliasResolver(aliasMap: NativeModuleAliasMap): AliasResolver {
 function getModules(
   schema: SchemaType,
 ): Readonly<{[hasteModuleName: string]: NativeModuleSchema}> {
-  return Object.keys(schema.modules).reduce<{[string]: NativeModuleSchema}>(
-    (modules, hasteModuleName: string) => {
-      const module = schema.modules[hasteModuleName];
-      if (module == null || module.type === 'Component') {
-        return modules;
-      }
-      modules[hasteModuleName] = module;
+  return Object.keys(schema.modules).reduce<{
+    [key: string]: NativeModuleSchema,
+  }>((modules, hasteModuleName: string) => {
+    const module = schema.modules[hasteModuleName];
+    if (module == null || module.type === 'Component') {
       return modules;
-    },
-    {},
-  );
+    }
+    modules[hasteModuleName] = module;
+    return modules;
+  }, {});
 }
 
 function isDirectRecursiveMember(

diff --git a/packages/react-native-codegen/src/parsers/__tests__/error-utils-test.js b/packages/react-native-codegen/src/parsers/__tests__/error-utils-test.js
@@ -985,14 +985,14 @@ describe('throwIfMoreThanOneCodegenNativecommands', () => {
 
 describe('throwIfConfigNotfound', () => {
   it('throws an error if config is not found', () => {
-    const configs: Array<{[string]: string}> = [];
+    const configs: Array<{[key: string]: string}> = [];
     expect(() => {
       throwIfConfigNotfound(configs);
     }).toThrowError('Could not find component config for native component');
   });
 
   it('does not throw an error if config contains some elements', () => {
-    const configs: Array<{[string]: string}> = [
+    const configs: Array<{[key: string]: string}> = [
       {
         propsTypeName: 'testPropsTypeName',
         componentName: 'testComponentName',
@@ -1006,7 +1006,7 @@ describe('throwIfConfigNotfound', () => {
 
 describe('throwIfMoreThanOneConfig', () => {
   it('throws an error if config is not found', () => {
-    const configs: Array<{[string]: string}> = [
+    const configs: Array<{[key: string]: string}> = [
       {
         propsTypeName: 'testPropsTypeName1',
         componentName: 'testComponentName1',
@@ -1022,7 +1022,7 @@ describe('throwIfMoreThanOneConfig', () => {
   });
 
   it('does not throw an error if config contains some elements', () => {
-    const configs: Array<{[string]: string}> = [
+    const configs: Array<{[key: string]: string}> = [
       {
         propsTypeName: 'testPropsTypeName',
         componentName: 'testComponentName',