rollup-plugin-postcss-lit

A Rollup plugin (v2.2.0, 2023) that transforms PostCSS-processed stylesheets (CSS, SCSS, Less, Stylus) into Lit templated `css` tagged template literals. It integrates with rollup-plugin-postcss and Vite's CSS handling, allowing direct CSS imports in LitElement components without runtime injection. Key differentiators: supports multiple preprocessors, works with both Rollup and Vite, and offers an `importPackage` option to target either `lit` or `lit-element`. Released under MIT, actively maintained.