Use light and dark color schemes in all browsers
Use the :dir pseudo-class in CSS
Use hwb() color functions in CSS
PostCSS plugin to fallback initial keyword.
Use space and slash separated color notation in CSS
PostCSS plugin to discard overridden @keyframes or @counter-style.
Use nested calc() expressions in CSS
Lightweight file-to-file transformer
Use env() variables in CSS
Use text-decoration in it's shorthand form in CSS
Correctly declare progressive enhancements for CSS Custom Properties.
PostCSS for CSS-in-JS and styles in JS objects
PostCSS plugin to swap :root for :host
Keep only the CSS you need based on comments and your browserslist
> Selector parser with built in methods for working with selector strings.
PostCSS plugin for mixins
Use flow-relative (inline-start and inline-end) values for float and clear
Use the color-mix function in CSS
Use postcss to process your css with a large selection of JavaScript plug-ins.
Use the relative color syntax in CSS
The Reference Element Pseudo-class: :scope
Use pow(), sqrt(), hypot(), log(), exp() exponential functions in CSS
PostCSS plugin for Tailwind CSS, a utility-first CSS framework for rapidly building custom user interfaces
Use number values in aspect-ratio media queries.