A pseudo-class for matching elements in a selector list
The Reference Element Pseudo-class: :scope
Style elements relative to other elements in CSS
Use the :any-link pseudo-class in CSS
Style form elements when they are empty
Use the :dir pseudo-class in CSS
Use the :focus-visible pseudo-selector in CSS
Use the :focus-within pseudo-selector in CSS
PostCSS plugin to transform :not() W3C CSS level 4 pseudo class to :not() CSS level 3 selectors
Color helpers to ease transformation between formats, gamut, etc
Algorithms to help you parse CSS from an array of tokens.
Convert modern CSS into something browsers understand
Use the parts of normalize.css or sanitize.css you need from your browserslist
Solve CSS math expressions
Use the random function in CSS
Use unquoted format on @font-face CSS definitions.
Determine selector specificity with postcss-selector-parser
Use cascade layers in CSS
Tokenize CSS
Use two values display syntax for inner and outer display types.
Parse CSS color values
Use the ic length unit
Resolve nested CSS selectors
Correctly declare progressive enhancements for CSS Custom Properties.