Correctly declare progressive enhancements for CSS Custom Properties.
Keep only the CSS you need based on comments and your browserslist
Use env() variables in CSS
PostCSS plugin to fallback initial keyword.
Use oklab() and oklch() color functions in CSS
Use the range notation in CSS media queries
Use flow-relative (inline-start and inline-end) values for float and clear
A parser for postcss-inherit's syntax
Use double-position gradients in CSS
Use pow(), sqrt(), hypot(), log(), exp() exponential functions in CSS
Use the color-mix function in CSS
Convert values with PostCSS (e.g. ms -> s)
Use the relative color syntax in CSS
Use the parts of normalize.css or sanitize.css you need from your browserslist
PostCSS plugin to fallback initial keyword.
Find CSS class selector positions in any CSS-like file (CSS, SCSS, Less, Sass, Stylus)
Use number values in aspect-ratio media queries.
Optimise inline SVG with PostCSS.
PostCSS syntax for parsing HTML (and HTML-like)
Use logical values in the resize property
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.
webhint parser needed to analyze SASS and SCSS files