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Deprecated options

This page lists configuration options that have been deprecated in Rspack.

These options are kept for backward compatibility only and should not be used in new projects.

experiments.css

Stability: Deprecated
  • Type: boolean
  • Default: false
Deprecated

This option is deprecated since Rspack 2.0. Users now need to manually add CSS rules to enable CSS support. In a future version, Rspack will automatically add CSS-related default rules.

Migration

To use CSS in Rspack 2.0, you need to manually add CSS rules to your configuration:

rspack.config.mjs
export default {
  module: {
    rules: [
      {
        test: /\.css$/,
        type: 'css/auto',
      },
    ],
  },
};

Legacy usage (deprecated)

rspack.config.mjs
export default {
  experiments: {
    css: true,
  },
};

experiments.incremental

Stability: Deprecated

This option has been moved to top-level incremental.

rules[].loaders

An array to pass the loader package name and its options.

Warning

This option has been deprecated. Use rules[].use instead.