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esbuild

examples/example-esbuild bundles a React app with esbuild and compiles StyleX via @stylexjs/unplugin. The unplugin extracts StyleX styles, aggregates them, and appends the output to the CSS asset produced by esbuild.

Install​

npm install --save-dev @stylexjs/unplugin

Configure the build​

Wire the unplugin into your esbuild script:

import esbuild from 'esbuild';
import stylex from '@stylexjs/unplugin';

esbuild.build({
  entryPoints: ['src/App.jsx'],
  bundle: true,
  metafile: true, // lets StyleX find the emitted CSS asset
  plugins: [
    stylex.esbuild({
      useCSSLayers: true,
      importSources: ['@stylexjs/stylex'],
      unstable_moduleResolution: { type: 'commonJS' },
      // ... other StyleX configuration
    }),
  ],
});

Ensure metafile: true so the plugin can locate the CSS output.

CSS entrypoint​

Ensure that there is one CSS file that is imported from your root layout component or JS entry point.