A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

A Webpack plugin to optimize \ minimize CSS assets.

A CSS parser, transformer, and minifier written in Rust

A JavaScript library for escaping CSS strings and identifiers while generating the shortest possible ASCII-only output.

Fast CSS Selectors API Engine

Parse CSS media query lists.

Use cascade layers in CSS

Use Custom Media Queries in CSS

Minify colors in your CSS files with PostCSS.

The custom `sort` method (mobile-first / desktop-first) of CSS media queries for `postcss-sort-media-queries`, `css-mqpacker` or `pleeease` (which uses css-mqpacker) or, perhaps, something else ))

Provides some base functions needed by a css-select adapter so that you don't have to implement the whole thing.

CSS parser / stringifier

Style form elements when they are empty

CSS modules support for TypeScript

Convert values with PostCSS (e.g. ms -> s)

Normalize wrapping quotes for CSS string literals.

Style elements relative to other elements in CSS

Discard comments in your CSS files with PostCSS.

Use Custom Properties Queries in CSS

Discard duplicate rules in your CSS files with PostCSS.