#Rspack built-in CSS

pluginRspackBuiltinCss is an experimental plugin that replaces css-loader, style-loader, and CssExtractRspackPlugin with Rspack's built-in css/* module types.

import { pluginRspackBuiltinCss } from '@rsbuild/core';

export default {
  plugins: [pluginRspackBuiltinCss()],
};

The plugin preserves loaders added by PostCSS, Lightning CSS, Sass, Less, and other plugins.

#CSS Modules

Configure CSS Modules through output.cssModules. The plugin supports:

• auto: boolean values
• exportLocalsConvention
• localIdentName
• mode: local, global, and pure
• namedExport

The following values are not supported and emit warnings:

• RegExp and function values for auto
• exportGlobals
• icss and function values for mode

Use the plugin options to configure Rspack parser and generator fields that are not covered by output.cssModules:

import { pluginRspackBuiltinCss } from '@rsbuild/core';

export default {
  plugins: [
    pluginRspackBuiltinCss({
      parser: {
        url: false,
        import: false,
      },
      generator: {
        localIdentHashSalt: 'custom-salt',
      },
    }),
  ],
};

The parser option supports exportType, url, import, resolveImport, animation, container, customIdents, dashedIdents, function, and grid.

The generator option supports esModule, localIdentHashDigest, localIdentHashDigestLength, localIdentHashFunction, and localIdentHashSalt.

CSS ?url imports are not supported.