Selector parser with built in methods for working with selector strings.

PostCSS plugin to transform :not() W3C CSS level 4 pseudo class to :not() CSS level 3 selectors

Fault-tolerant CSS parser for PostCSS that can handle malformed or incomplete CSS syntax without throwing errors

Reduce transform functions with PostCSS.

A PostCSS plugin that converts px units to rem units for responsive design.

Convert modern CSS into something browsers understand

A PostCSS plugin that ensures CSS property values are consistently ordered for optimization.

Trim whitespace inside and around CSS rules & declarations.

Normalize URLs with PostCSS

PostCSS plugin that normalizes unicode-range descriptors and converts them to shorter wildcard ranges when possible.

Normalize CSS animation/transition timing functions by converting verbose cubic-bezier() and steps() functions to shorter named equivalents.

Normalize wrapping quotes for CSS string literals in PostCSS pipelines.

PostCSS plugin that converts two-value background-repeat and mask-repeat syntax into single-value shorthand equivalents.

Normalize keyword values for position into length values.

PostCSS plugin that normalizes CSS display property values by converting multiple-value display syntaxes into their equivalent single-value forms.

PostCSS plugin that normalizes CSS @charset declarations by ensuring only a single charset rule exists and is positioned at the top of the document

PostCSS plugin that enables CSS nesting functionality following the CSS Nesting specification

PostCSS plugin to unwrap nested rules like how Sass does it

PostCSS plugin to use CSS Modules everywhere

PostCSS plugin that optimizes CSS selectors by removing unnecessary whitespace, deduplicating selectors, and performing various minification transforms.