csstools/postcss-plugins

Use 4 & 8 character hex color notation in CSS

Use Custom Properties Queries in CSS

Use the :any-link pseudo-class in CSS

Use Custom Media Queries in CSS

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

Use the rebeccapurple color keyword in CSS

Use Custom Selectors in CSS

Nest rules inside each other in CSS

Enable support for case insensitive attribute matching in selectors

Convert modern CSS into something browsers understand

Determine selector specificity with postcss-selector-parser

Use space and slash separated color notation in CSS

Use env() variables in CSS

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

Use lab() and lch() color functions in CSS

Use the :focus-visible pseudo-selector in CSS

Use a place-* shorthand for align-* and justify-* in CSS

Use the :dir pseudo-class in CSS

Use the :focus-within pseudo-selector in CSS

Display resolution-dependent images using the image-set() function in CSS

Use the overflow shorthand in CSS

Use logical properties and values in CSS

Use light and dark color schemes in all browsers

Style form elements when they are empty

Style elements relative to other elements in CSS

Use double-position gradients in CSS

Use cascade layers in CSS

Use the color() function in CSS

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

Use round, rem and mod functions in CSS

Use the unset keyword in CSS.

Use the ic length unit

A pseudo-class for matching elements in a selector list

Use oklab() and oklch() color functions in CSS

Use unquoted format on @font-face CSS definitions.

Use hwb() color functions in CSS

Correctly declare progressive enhancements for CSS Custom Properties.

Use sin(), cos(), tan(), acos(), atan(), and atan2() to compute trigonometric relationships

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