Use logical values in the resize property

Use logical overscroll behavior properties and values in CSS

Use the parts of normalize.css or sanitize.css you need from your browserslist

Keep only the CSS you need based on comments and your browserslist

Use flow-relative (inline-start and inline-end) values for float and clear

Use vb and vi length units in CSS

Merge CSS rules with PostCSS.

Generate fallback values for content with alt text

Use pow(), sqrt(), hypot(), log(), exp() exponential functions in CSS

Use Custom Media Queries in CSS

PostCSS plugin to keep rules and at-rules content in order.

Advanced optimisations for cssnano; may or may not break your CSS!

Use logical overflow properties and values in CSS

Transforms css values and at-rule params into the tree

Minify selectors with PostCSS.

Determine selector specificity with postcss-selector-parser

Mix any number of colors with the color-mix function in CSS

Resolve nested CSS selectors

Discard duplicate rules in your CSS files with PostCSS.

Use Custom Properties Queries in CSS