What should Meta teams do about it?

Update imports from react-native/assets-registry to react-native before the old package is removed • Review React compiler version for JSX tag prefix handling if using `_` or `$` prefixed components • Add useWindowVirtualizer to your memoization compatibility audit if using TanStack react-virtual

Which Meta repositories shipped on July 7, 2026?

facebook/react, facebook/react-native

REACT COMPILER FIXES JSX TAG PARSING, REACT NATIVE MOVES ASSETREGISTRY INTO CORE

By RepoJournal · Filed 06:03 UTC on July 7, 2026 · About Meta

React's compiler now correctly handles JSX tags prefixed with underscores and dollar signs, while React Native consolidates its asset registry into the main package to eliminate a decade-old singleton footgun.

The React compiler shipped a critical fix [1] for JSX tags starting with `_` or `$` that were incorrectly classified as host elements instead of components, causing memoization to be skipped entirely. On the same desk, the compiler blacklisted `useWindowVirtualizer` [2] from TanStack's react-virtual alongside its sibling `useVirtualizer`, both of which use interior mutability patterns that break memoization. React DevTools fixed a parsing bug [3] in `printOperationsArray` that broke the opcode loop invariant when decoding activity slice changes, a silent failure that would corrupt the operations array during inspection. Meanwhile, React's DevTools component search got a navigation overhaul [4] that lets you jump directly to any result in massive component trees instead of stepping through 100+ matches one at a time. Over on React Native, the team executed a carefully sequenced migration [5] moving AssetRegistry out of the separate `react-native/assets-registry` package into the main `react-native` package, eliminating a longstanding ecosystem footgun where the module-scoped singleton state could diverge across the runtime. The deprecation [6] of `@react-native/assets-registry` is now live, with ESLint configs [7] restored to keep CI passing during the transition. Electron bumped to 43.0.0 [8] with breaking changes around clipboard API access from renderer processes and dSYM compression format shifts. Swift Package definitions for performance monitoring got cleaned up [9] to drop the unnecessary `cxxreact` dependency that the BUCK build already had removed.

FAQ

What changed in Meta on July 7, 2026?: React's compiler now correctly handles JSX tags prefixed with underscores and dollar signs, while React Native consolidates its asset registry into the main package to eliminate a decade-old singleton footgun.
What should Meta teams do about it?: Update imports from react-native/assets-registry to react-native before the old package is removed • Review React compiler version for JSX tag prefix handling if using `_` or `$` prefixed components • Add useWindowVirtualizer to your memoization compatibility audit if using TanStack react-virtual
Which Meta repositories shipped on July 7, 2026?: facebook/react, facebook/react-native

REACT COMPILER FIXES JSX TAG PARSING, REACT NATIVE MOVES ASSETREGISTRY INTO CORE

The showcase is a teaser. Your wire is the product.

The showcase is a teaser.
Your wire is the product.