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Make Utilities modules Flow strict-local (#57729) - #57729

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Make Utilities modules Flow strict-local (#57729)#57729
rubennorte wants to merge 5 commits into
react:mainfrom
rubennorte:export-D113763792

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@rubennorte

@rubennorte rubennorte commented Jul 28, 2026

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Summary:

Upgrade assorted Utilities modules from flow to flow strict-local with accurate types. insetsDiffer uses local variables instead of reassigning its function parameters. Behavior is unchanged.

Changelog: [Internal]

Reviewed By: huntie

Differential Revision: D113763792

@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Jul 28, 2026
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meta-codesync Bot commented Jul 28, 2026

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@rubennorte has exported this pull request. If you are a Meta employee, you can view the originating Diff in D113763792.

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Warning

JavaScript API change detected

This PR commits an update to ReactNativeApi.d.ts, indicating a change to React Native's public JavaScript API.

  • Please include a clear changelog message.
  • This change will be subject to additional review.

This change was flagged as: POTENTIALLY_BREAKING

rubennorte added a commit to rubennorte/react-native that referenced this pull request Jul 28, 2026
Summary:
Pull Request resolved: react#57729

Upgrade assorted Utilities modules from `flow` to `flow strict-local` with accurate types. `insetsDiffer` uses local variables instead of reassigning its function parameters. Behavior is unchanged.

Changelog: [Internal]

Reviewed By: huntie

Differential Revision: D113763792
@meta-codesync meta-codesync Bot changed the title Make Utilities modules Flow strict-local Make Utilities modules Flow strict-local (#57729) Jul 28, 2026
rubennorte and others added 5 commits July 29, 2026 03:25
Summary:
Upgrade the legacy native module spec files from `flow` to `flow strict-local` to enforce stricter local type checking. Loose `Object` types were replaced with the codegen-equivalent `UnsafeObject`, and `Array<any>` parameters with `Array<unknown>`, both of which are codegen-identical so the generated native interfaces are unchanged.

Changelog: [Internal]

Differential Revision: D113763785
Summary:
Upgrade the Animated implementation and node modules from `flow` to `flow strict-local` to enforce stricter local type checking, replacing loose types with the accurate existing Animated type vocabulary. Behavior is unchanged.

Changelog: [Internal]

Differential Revision: D113763780
Summary:
Upgrade the Blob-related modules (`File`, `FileReader`, `URL`, `URLSearchParams`) from `flow` to `flow strict-local`. These expose spec-mandated getters/setters, so they opt out of the `unsafe-getters-setters` lint with a scoped `// flowlint unsafe-getters-setters:off` directive. `URL` also received small behavior-preserving refactors (local variables instead of parameter reassignment, explicit null/empty checks).

Changelog: [Internal]

Differential Revision: D113763778
Summary:
Upgrade the StyleSheet modules from `flow` to `flow strict-local`. `processFilter` and `setNormalizedColorAlpha` required small, behavior-preserving refactors (local variables instead of reassigning function parameters, and explicit null/empty checks) to satisfy the stricter lints.

Changelog: [Internal]

Differential Revision: D113763790
Summary:
Pull Request resolved: react#57729

Upgrade assorted Utilities modules from `flow` to `flow strict-local` with accurate types. `insetsDiffer` uses local variables instead of reassigning its function parameters. Behavior is unchanged.

Changelog: [Internal]

Reviewed By: huntie

Differential Revision: D113763792
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