rollup-copy-transform-css

Rollup plugin utility for transforming CSS files during copy operations with rollup-plugin-copy. Current stable version is 2.2.0, released November 2025, with support for Rollup 2, 3, and 4. Provides CSS minification via cssnano or esbuild, stylesheet and asset inlining via postcss-import and postcss-url, and custom PostCSS plugin pipelines. Key differentiators: supports both PostCSS and esbuild engines for fast processing, integrates seamlessly with rollup-plugin-copy targets, and offers source map generation. Requires Node.js 18+ as of v2.0.0.