- Ensure React Compiler runs on first-party code in Turbopack (Excludes
node_modules, but also fully skips running Babel on node_modules)
- Ensure React Compiler runs on first-party code in Webpack (Excludes
node_modules, but also fully skips running Babel on node_modules)
- Ensure React Compiler only runs on browser code -- Per React team
recommendation, it only optimizes browser-facing code currently.
- Ensure React Compiler runs on Pages Router in Webpack -- Was already
the case for Turbopack.
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### What
This PR exposes new experimental configuration for next.js,
`experimental.reactCompiler`. Under the hood, this option configures to
use new experimental react compiler
(https://react.dev/learn/react-compiler#). `reactCompiler` value can be
either boolean or an object contains partial set of compiler itself's
configuration option.
For the webpack and turbopack both it is enabled by adding a babel
plugin for the react compiler. If user have an existing .babelrc, plugin
will be appended to the config. Otherwise, swc will still kicks in (for
webpack) or turbopack for the general transform but only compiler babel
plugin will run via babel.
---------
Co-authored-by: Tim Neutkens <tim@timneutkens.nl>
Jiwon Choi