a CSS selector compiler/engine

Selectors decision tree - choose matching selectors, fast

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

Algorithms to help you parse CSS from an array of tokens.

Solve CSS math expressions

Tokenize CSS

Parse CSS color values

CSS minifier with structural optimisations

Use oklab() and oklch() color functions in CSS

parse a css color string

A CSS Modules transform to extract local aliases for inline imports

Powerful and compliant CSS selector parser.

CSS syntax patches for CSS tree

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 ))

LESS CSS test-suite. Run any kind of test on LESS stylesheets.

A CSS Modules transform to extract export statements from local-scope classes

Inlines img, script and link tags into the same file.

Color helpers to ease transformation between formats, gamut, etc

CSS vendor prefix detection and property feature testing.

Normalize unicode-range descriptors, and can convert to wildcard ranges.