Use logical values in the resize property
Use flow-relative (inline-start and inline-end) values for float and clear
Use vb and vi length units in CSS
Use logical overscroll behavior properties and values in CSS
Use logical overflow properties and values in CSS
Use logical properties and values in CSS
Color helpers to ease transformation between formats, gamut, etc
Algorithms to help you parse CSS from an array of tokens.
Solve CSS math expressions
Use unquoted format on @font-face CSS definitions.
Determine selector specificity with postcss-selector-parser
Convert modern CSS into something browsers understand
Tokenize CSS
Use two values display syntax for inner and outer display types.
Use the ic length unit
Use Custom Media Queries in CSS
A pseudo-class for matching elements in a selector list
Resolve nested CSS selectors
Utilities for PostCSS plugins
Parse CSS media query lists.
Use the unset keyword in CSS.
Parse CSS color values
Use the parts of normalize.css or sanitize.css you need from your browserslist
Use oklab() and oklch() color functions in CSS