A Rust port of the React Compiler and a new DevTools Facade for programmatic introspection land on main.
Status as of June 18, 2026
What is this repo?
React is the library for building user interfaces on the web and native platforms. It powers many of Meta's products and is widely used externally. The repository contains the React core, server rendering (Fizz), server components (Flight), DevTools, and a compiler for automatic memoization. Development is active across all areas, with a major experimental Rust port of the compiler underway.
Snapshotbased on the last 30 days of activity
Key features2
- React Compiler Rust PortNot live yetMerged into the main branch, but not released or deployed yet, so users don't have it.c21c16c18c17c19c20c11c6
The React Compiler has been ported to Rust as an experimental rewrite; all existing tests pass but no builds are available yet. Subsequent optimizations have reduced binary size by ~35% and improved hashing performance. The Rust compiler is still work-in-progress.
- DevTools FacadeNot live yetMerged into the main branch, but not released or deployed yet, so users don't have it.c1c2c3c4c8c13pr36593pr36597pr36598pr36599pr36682
A new react-devtools-facade package was introduced, providing building blocks for programmatic runtime introspection of React component trees and profiling data. It allows other tools to access React internals without relying on the DevTools UI. The package landed as a series of five pull requests, including support for already-installed DevTools hooks.
What you can tell developers
- Available now0Released and developer-facing, so it's safe to tell developers it's available now.
- Nothing released to users yet
- Coming4Developer-facing, but only merged or still in progress. Not released to developers yet.
- React Compiler Rust PortDevTools FacadeServer Rendering And Streaming FixesReact Compiler JS Fixes And Improvements
- Behind the scenes0Behind-the-scenes work your developers won't notice, like refactors, infra, tests, and deps.
- No behind-the-scenes work