Summary

When following the setup instructions for React Compiler on the current live docs site, if using a custom Vite Babel plugin + React SWC or React Router v7 framework mode, you will notice that if a component gets optimized by React Compiler, the sourcemaps appear to have some React Compiler-optimized code paths in them, making dev debugging more difficult.

Page

https://react.dev/learn/react-compiler/installation

Details

Please see reproduction repository for specific details: https://github.com/andrew-locklair-fs/react-vite-compiler-repro

Screenshot demonstrating sourcemaps appropriately added with default config:

Screenshot demonstrating sourcemaps not added when using the custom vite-plugin-babel:

Happy to dig into this more, but hoping that it's as simple as just turning the relevant sourcemaps option ON for the custom Vite Babel plugin. I ran into this converting a RRv7 framework mode repo to add React Compiler, and the instructions seem to leave out sourceMaps: true in babelConfig.