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
Keep only the CSS you need based on comments and your browserslist
Correctly declare progressive enhancements for CSS Custom Properties.
Ensure values are ordered consistently in your CSS.
Use the range notation in CSS media queries
Provides a list of electron-to-chromium version mappings
PostCSS plugin to fallback initial keyword.
Use flow-relative (inline-start and inline-end) values for float and clear
ICSS utils for postcss ast
Parses calc of css and converts it to AST.
Use pow(), sqrt(), hypot(), log(), exp() exponential functions in CSS
Use the relative color syntax in CSS
Use the parts of normalize.css or sanitize.css you need from your browserslist
Use double-position gradients in CSS
Convert values with PostCSS (e.g. ms -> s)
PostCSS plugin to fallback initial keyword.
PostCSS helpers to throw or output GNU style messages
PostCSS syntax for parsing HTML (and HTML-like)
Use number values in aspect-ratio media queries.
Use logical values in the resize property
Optimise inline SVG with PostCSS.
Use vb and vi length units in CSS
The Reference Element Pseudo-class: :scope
PostCSS plugin to keep rules and at-rules content in order.