#output.sourceMap

• Type:

type SourceMap =
  | boolean
  | {
      js?: Rspack.Configuration['devtool'];
      css?: boolean;
    };

• Default:

const defaultSourceMap = {
  js: isDev ? 'cheap-module-source-map' : 'hidden-source-map',
  css: isDev,
};

When output.sourceMap is not configured, the source map generation rules of Modern.js are different from Rsbuild:

• In the development mode, JS and CSS source maps are generated for development debugging.
• In the production mode, JS source maps are generated for stack trace backtracking, and CSS source maps are not generated to provide the best build performance.