rollup-plugin-inline-postcss

A Rollup plugin that processes inline CSS (template literals or `<style>` tags) with PostCSS. Current stable version is 3.0.1. The plugin supports custom regex and delimiters, environment-based PostCSS config, and multiple style declarations per file. Unlike other PostCSS Rollup plugins (e.g., rollup-plugin-postcss), this one focuses solely on inline styles rather than imported CSS files, making it ideal for Web Components or CSS-in-JS workflows. Version 3 introduced breaking changes including renaming `styleDelineator` to `styleDelimiter` and support for multiple style blocks. Maintained by the author, releases are sporadic.