Support React Compiler w/ Bun's built-in bundler

[mnpenner]

What is the problem this feature would solve?

React Compiler recently reached v1.0 (https://react.dev/blog/2025/10/07/react-compiler-1). If Bun aims to replace Vite and other bundlers, it would be nice if it supported most of the same plugins, especially React Compiler.

Thus I am requesting support for React Compiler both with bun build CLI and Bun.build JS API (https://bun.com/docs/bundler).

Please note that this has nothing to do with Next.JS nor Turbopack. If that's your issue, please see the now overrun issue #23554

What is the feature you are proposing to solve the problem?

React Compiler not only provides significant speed improvements, it also changes how we write React code. A lot of stuff doesn't need to be memoized any more, so the way I write components is different depending on if React Compiler is enabled. Thus switching build tools isn't merely reconfiguring the build process, it also trickles down into all the React Components.

What alternatives have you considered?

Use Vite, Webpack, Rollup, or a different bundler.

[github-actions]

Found 1 possible duplicate issue:

1. Fix next.js turbopack build with react compiler (cannot find module ...) #23554

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[RiskyMH]

(Copying over my msg from the other thread)

I made use of an esbuild plugin I found: https://gist.github.com/hyrious/0ec637c7ec2214096cb591062ec73ee0, it would be cool if someone made a good package for this!

For my usage see build-plugins/react-compiler.ts and build.tsx:42

[mnpenner]

Oh, I didn't know know Bun supported plugins like that! That makes this a lot simpler.

Docs for future reference: https://bun.com/docs/bundler/plugins

I suppose the prudent thing would be to bundle that plugin using Bun's bundler. I might use tsdown though because I know the TS types "just work" with that... let me give this a go.

[mnpenner]

Here's a shoddy release: https://www.npmjs.com/package/bun-plugin-react-compiler

[jbhannah]

Here's a shoddy release: https://www.npmjs.com/package/bun-plugin-react-compiler

was literally just looking up how to do this and found this thread, at an initial pass this plugin works for me (using superglue and rails)!

[mnpenner]

@jbhannah That's awesome! Glad it's working for you. I haven't actually tried it myself yet 😀

I just released v0.2.0 which uses Bun.build instead of tsdown so as not to be hypocritical, but the output should be nearly identical.

If there are issues with it, they should probably be filed at https://github.com/mnpenner/bun-plugin-react-compiler/issues so as not to clutter this repo (plus I wouldn't see them).

[RiskyMH]

@mnpenner logically you can just use the raw TS code in the npm package also to be simpler. Like its not meant to work for node anyway and the types are really simple that it shouldn't really change anything perf wise.