Nest rules inside each other in CSS

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

Normalize CSS animation/transition timing functions.

Reduce transform functions with PostCSS.

Ensure CSS selectors are unique.

TypeScript implementation of DDSketch, a distributed quantile sketch algorithm

Trim whitespace inside and around CSS rules & declarations.

Minify at-rule params with PostCSS

Use the :focus-within pseudo-selector in CSS

SCSS parser for PostCSS

PostCSS plugin to transform percentage-based opacity values to more compatible floating-point values.

Normalize URLs with PostCSS

Use two values display syntax for inner and outer display types.

Use the :focus-visible pseudo-selector in CSS

Use unquoted format on @font-face CSS definitions.

Use the overflow shorthand in CSS

Use the ic length unit

Use Custom Selectors in CSS

Merge longhand properties into shorthand with PostCSS.

Use the rebeccapurple color keyword in CSS