Use Custom Media Queries in CSS

PostCSS plugin to unwrap nested rules like how Sass does it

PostCSS plugin to transform clamp() to combination of min/max

Use logical properties and values in CSS

Use vb and vi length units in CSS

Use the gap, column-gap, and row-gap shorthand properties in CSS

Convert values with PostCSS (e.g. ms -> s)

Use the random function in CSS

Use the ic length unit

Use round, rem and mod functions in CSS

PostCSS plugin to use CSS Modules everywhere

Merge longhand properties into shorthand with PostCSS.

PostCSS plugin for Sass-like variables

Use the :dir pseudo-class in CSS

css-vw

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

Use the range notation in CSS media queries

Use sign and abs functions in CSS

Ensure values are ordered consistently in your CSS.

Trim whitespace inside and around CSS rules & declarations.