Normalize CSS animation/transition timing functions.
Trim whitespace inside and around CSS rules & declarations.
Use the :focus-visible pseudo-selector in CSS
Normalize keyword values for position into length values.
PostCSS plugin to transform :not() W3C CSS level 4 pseudo class to :not() CSS level 3 selectors
Normalize URLs with PostCSS
Ensure CSS selectors are unique.
Nest rules inside each other in CSS
Merge longhand properties into shorthand with PostCSS.
Use unquoted format on @font-face CSS definitions.
Use a place-* shorthand for align-* and justify-* in CSS
PostCSS plugin to transform percentage-based opacity values to more compatible floating-point values.
Use the :focus-within pseudo-selector in CSS
SCSS parser for PostCSS
Use the ic length unit
Use 4 & 8 character hex color notation in CSS
PostCSS plugin to transform clamp() to combination of min/max
Use the :any-link pseudo-class in CSS
Use the overflow shorthand in CSS
Use Custom Selectors in CSS
Use the rebeccapurple color keyword in CSS
Use logical properties and values in CSS
Use the gap, column-gap, and row-gap shorthand properties in CSS
Use the unset keyword in CSS.