Use the :focus-visible pseudo-selector in CSS
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.
postcss plugin to prefix all css selector classes and ids
Use the :focus-within pseudo-selector in CSS
Use two values display syntax for inner and outer display types.
SCSS parser for PostCSS
PostCSS plugin to transform clamp() to combination of min/max
Use Custom Selectors in CSS
Use the rebeccapurple color keyword in CSS
Use the ic length unit
Use the :any-link pseudo-class in CSS
Use the overflow shorthand in CSS
Use the gap, column-gap, and row-gap shorthand properties in CSS
Use 4 & 8 character hex color notation in CSS
Use logical properties and values in CSS
PostCSS plugin to transform W3C font-variant properties to more compatible CSS (font-feature-settings)
Use the unset keyword in CSS.
Use the :dir pseudo-class in CSS
Use the color() function in CSS
Use space and slash separated color notation in CSS
Style form elements when they are empty
Use hwb() color functions in CSS