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wire 2026-05-21
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REACT COMPILER STOPS LEAKING PHANTOM IMPORTS, NATIVE GAINS PLATFORM COLOR SUPPORT

By RepoJournal · Filed · About Meta · Composed from the cited sources · methodology

The React compiler is now cleaning up after itself, while React Native's Android layer just got smarter about theme-aware ripples and image headers.

React's compiler was registering memo cache imports even when functions got discarded, leaving dead `import { c as _c }` statements in the output [1]. The fix clears these stale registrations in `applyCompiledFunctions`, shrinking generated code for any file that mixes compiled and uncompiled functions. On the Native side, Android's `Pressable` now supports `PlatformColor` for ripple effects [2], killing the invariant that forced numeric-only colors and making theme-aware touch feedback possible. Image headers that were being silently dropped on Android are now passed through correctly [3], fixing a silent data loss bug. Under the hood, React Native is consolidating its Kotlin migration with a mechanical port of `NativeViewHierarchyManager` from Java [4], and deprecating legacy `DefaultReactActivityDelegate` constructors that were already being ignored [5]. A scheduler fix clears pending tasks on error to prevent cascading failures [6].

Action items

References

  1. [1] [compiler] Don't emit spurious `import { c as _c }` for discarded functions (#36500) ↗ facebook/react
  2. [2] feat(Pressable): add support for PlatformColor and alpha (#56395) ↗ facebook/react-native
  3. [3] fix missing headers on image source in android (#56905) ↗ facebook/react-native
  4. [4] Migrate NativeViewHierarchyManager from Java to Kotlin (#56828) ↗ facebook/react-native
  5. [5] Deprecate legacy DefaultReactActivityDelegate constructors (#56906) ↗ facebook/react-native
  6. [6] Clear RuntimeScheduler queues on error (#56892) ↗ facebook/react-native

$ ls meta/reviews/ # the step-back reads

the week in review React 19.3 ships View Transitions, RN 0.88-rc breaks Touchable the month in review React, React Native, and Jest harden the stack
Full archive → Weekly reviews →

Quick answers

What shipped in Meta on May 21, 2026?
The React compiler is now cleaning up after itself, while React Native's Android layer just got smarter about theme-aware ripples and image headers. In total, 13 commits and 1 pull requests landed.
What were the notable Meta updates?
[compiler] Don't emit spurious `import { c as _c }` for discarded functions (#36500), feat(Pressable): add support for PlatformColor and alpha (#56395), and fix missing headers on image source in android (#56905).
♥

$ log Meta --recent

React Native strips dead config, React compiler fixes exponent folding 21 shipped React Native's generated SwiftPM manifests inherit the app's iOS floor, and SectionList scrolls to the right row 30 shipped React stops emulating bubbling for toggle events, fixes Fragment compareDocumentPosition 9 shipped React Native's Babel preset stops dropping Platform.select side effects 6 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training GSM8K scoring parses answers as exact decimals AI Red Teaming PyRIT closes a judge-spoofing hole, promptfoo accepts Langfuse v6

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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