Who contributed to Meta on June 13, 2026?

2 developers shipped this update, including SamChou19815 and eps1lon.

What were the notable Meta updates?

[flow] Update files synced to react-native to use modern flow syntax, Update required references to GitHub repo, and feat(style): remove `experimental_` prefix from `backgroundImage` (#57165).

REACT TIGHTENS FLOW SYNTAX, REACT-NATIVE GRADUATES BACKGROUND IMAGES

By RepoJournal · Filed 06:02 UTC on June 13, 2026 · About Meta

2 people shipped this

SamChou19815 @SamChou19815 1 cited

eps1lon @eps1lon 1 cited

React is locking down modern Flow syntax across its ecosystem while React-Native promotes backgroundImage out of experimental mode, but breaking changes are coming for animation backends.

React shipped a flow syntax modernization [1] that bumps hermes-parser dependencies and enforces strict typing rules across files synced to React-Native, forcing the native layer to keep pace with type safety standards. Alongside that, React fixed a critical GitHub repository reference issue [2] where package.json fields weren't resolving correctly in Trusted Publishing workflows, a small change that unblocks CI automation across the monorepo. On the React-Native side, backgroundImage graduated from experimental status [3], a promotion that validates months of real-world usage in NativeWind, Unstyles, and Tamagui without incident. More critically, a fix landed for native-driven animation props being silently dropped on Animated.FlatList and Animated.SectionList [4] when using the shared animated backend, which means any team relying on useNativeDriver with these components needs to verify their animations aren't already broken. React-Native also marked UTFSequence as deprecated [5], clearing dead code that has zero documented usage across the ecosystem. Smaller cleanup work includes eliminating legacy Flow syntax in ReactNativeFeatureFlags.js [6] and a defensive fix to RCTEventEmitter's callableJSModule checks [7].

Action items

→ Test Animated.FlatList/SectionList animations immediately if using shared animated backend facebook/react-native [immediate]
→ Remove any UTFSequence imports before next release cycle facebook/react-native [plan]
→ Audit Flow syntax in synced files against new enforcement rules facebook/react [plan]

References

[1] [flow] Update files synced to react-native to use modern flow syntax ↗ facebook/react
[2] Update required references to GitHub repo ↗ facebook/react
[3] feat(style): remove `experimental_` prefix from `backgroundImage` (#57165) facebook/react-native
[4] Fix native-driven props dropped on Animated.FlatList/SectionList under shared animated backend (#57178) facebook/react-native
[5] chore: Mark UTFSequence as deprecated to remove in the future (#57184) facebook/react-native
[6] Eliminate legacy flow syntax in ReactNativeFeatureFlags.js (#57192) facebook/react-native
[7] RCTEventEmitter: minor fix to callableJSModule check (#57182) facebook/react-native

Quick answers

What shipped in Meta on June 13, 2026?: React is locking down modern Flow syntax across its ecosystem while React-Native promotes backgroundImage out of experimental mode, but breaking changes are coming for animation backends. In total, 11 commits and 2 pull requests landed.
Who contributed to Meta on June 13, 2026?: 2 developers shipped this update, including SamChou19815 and eps1lon.
What were the notable Meta updates?: [flow] Update files synced to react-native to use modern flow syntax, Update required references to GitHub repo, and feat(style): remove `experimental_` prefix from `backgroundImage` (#57165).

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