Who contributed to Meta on July 7, 2026?

4 developers shipped this update, including sleitor, gtkatakura, anxkhn, and Biki-das.

What were the notable Meta updates?

[compiler] Fix JSX tags prefixed with `_` or `$` incorrectly treated as host elements, [compiler]: add `useWindowVirtualizer` to known incompatible libraries, and [DevTools] Fix printOperationsArray decode of applied activity slice change.

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

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

4 people shipped this

sleitor @sleitor 1 cited

gtkatakura @gtkatakura 1 cited

anxkhn @anxkhn 1 cited

Biki-das @Biki-das 1 cited

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.

Action items

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

References

[1] [compiler] Fix JSX tags prefixed with `_` or `$` incorrectly treated as host elements ↗ facebook/react
[2] [compiler]: add `useWindowVirtualizer` to known incompatible libraries ↗ facebook/react
[3] [DevTools] Fix printOperationsArray decode of applied activity slice change ↗ facebook/react
[4] [DevTools] Make component search results directly navigable ↗ facebook/react
[5] Move AssetRegistry implementation into main package, expose as public API (#57369) facebook/react-native
[6] Deprecate @react-native/assets-registry (#57370) facebook/react-native
[7] Restore eslint path match for assets-registry (fix CI) (#57450) facebook/react-native
[8] Bump Electron to 43.0.0 (#57422) facebook/react-native
[9] Drop cxxreact dep from performance/cdpmetrics + timeline Package.swift (#57446) facebook/react-native

Quick answers

What shipped 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. In total, 27 commits and 8 pull requests landed.
Who contributed to Meta on July 7, 2026?: 4 developers shipped this update, including sleitor, gtkatakura, anxkhn, and Biki-das.
What were the notable Meta updates?: [compiler] Fix JSX tags prefixed with `_` or `$` incorrectly treated as host elements, [compiler]: add `useWindowVirtualizer` to known incompatible libraries, and [DevTools] Fix printOperationsArray decode of applied activity slice change.

REACT BENCH TOOLING GETS JSON OUTPUT, EYES NEXT.JS INTEGRATION

React's benchmark suite now exports machine-readable JSON, unblocking its adoption in Next.js performance tracking.

javascript 2 shipped 1-min read

Meta 2 days ago

REACT NATIVE CLEANS UP CLI INTERNALS ACROSS 4 COMMITS

Alex Hunt's team dropped legacy dependencies and reorganized the dev server stack to make react-native.config.js a thin routing layer.

javascript 4 shipped 1-min read

Meta 3 days ago

REACT FIBER FIXES SINGLETON PROPERTY BLEED, REACT NATIVE STRIPS DEAD CODE

React plugged a critical Fiber bug where singleton cleanup was nuking third-party attributes, while React Native dropped unused timing code from iOS binaries.

javascript 11 shipped 1-min read

Meta 4 days ago

REACT DEVTOOLS BRIDGE HARDENS AGAINST RECONNECTS AND CORRUPTION

React's DevTools layer just got bulletproof: hoxyq landed four interconnected patches that eliminate silent state corruption, validate invariants before mutation, and handle extension reconnects with message buffering and handshakes.

javascript 22 shipped 2-min read

Elsewhere on the wire

AI Agents about 21 hours ago

CLINE SHIPS FIVE CRITICAL AGENT FIXES AFTER END-TO-END TESTING BLITZ

Saoudrizwan just landed a cascade of fixes that prevent the agent loop from running wild, stop file reads from resolving to the wrong directory, and plug the compaction pipeline.

ai-agents 16 shipped 2-min read

Local LLMs about 21 hours ago

LLAMA.CPP SHIPS MINIMAX-M3 SPARSE ATTENTION, VLLM UNLOCKS HETEROGENEOUS PREFILL-DECODE

The inference stack gets a new model architecture and a fundamental shift in how prefill and decode can run on different hardware configurations.

+10

llms 125 shipped 1-min read

@CachyOS about 21 hours ago

GLIBC 2.43 REBUILD SHIPS, INSTALLER JUMPS TO C++26

CachyOS pushed glibc 2.43 through the pipeline while the CLI installer upgraded its C++ standard to C++26, signaling a major refresh across core infrastructure.

infra 97 shipped 1-min read

Elixir & Phoenix about 21 hours ago

ECTO FIXES SUBQUERY PLANNING IN JOINS, ELIXIR PATCHES IEX PARSING

Ecto's query planner now handles subqueries correctly in interpolated join filters, while Elixir fixes a syntax error that broke 'not in' as a continuation operator in IEx.