This Week In React #287: Fragment ref, React Compiler, StyleX, React Router, cnfast, Base UI, Remotion, React Aria

Weekly roundup covering React and React Native ecosystem news. Key React highlights include the upcoming Fragment ref feature (FragmentInstance) slated for React v19.3, React Compiler updates including a Bun integration and Rust-based compiler progress, React Router 8.0 release (ESM-only, boring-by-design upgrade), StyleX 0.19, Base UI 1.6, and TanStack Table v9 memory improvements. On the React Native side, Reanimated 4.5 adds CSS pseudo-selector support, Expo SDK 56 stabilizes iOS widgets and Live Activities, and VisionCamera enables real-time video processing. The broader ecosystem sees Vite 8.1 with Bundled Dev Mode, Astro 7.0 with ~61% faster builds via Rolldown, TypeScript 7.0 RC (Go rewrite), and a GitHub Actions security tightening that prevents supply chain attacks like those that recently hit TanStack, Nx, and PostHog.