A cross-browser CSS foundation
Use the parts of normalize.css or sanitize.css you need from your browserslist
A best-practices CSS foundation
Algorithms to help you parse CSS from an array of tokens.
Solve CSS math expressions
Color helpers to ease transformation between formats, gamut, etc
Parse CSS color values
Parse CSS media query lists.
Tokenize CSS
A list of CSS features and their positions in the process of becoming implemented web standards
Determine selector specificity with postcss-selector-parser
Parse CSS Cascade Layer names.
Utilities for PostCSS plugins
Resolve nested CSS selectors
CSS syntax patches for CSS tree
Use unquoted format on @font-face CSS definitions.
Use the light-dark() color function in CSS
A pseudo-class for matching elements in a selector list
Use two values display syntax for inner and outer display types.
Use the ic length unit
Convert modern CSS into something browsers understand
Use the unset keyword in CSS.
Use oklab() and oklch() color functions in CSS
A modern alternative to CSS resets