rollup-plugin-lit-css

Rollup plugin to import CSS files as JavaScript tagged-template literal objects for LitElement, FAST, and other web component libraries. Current version 6.0.1, released August 2024. Includes support for minification via cssnano, custom template tag specifiers, and transform hooks for Sass/Less/PostCSS. Ships TypeScript types. Key differentiator: allows CSS-in-CSS workflow for Lit-based projects, vs alternatives like lit-css-loader (webpack) or esbuild-plugin-lit-css.