Usage no npm install needed!

<script type="module">
  import postcssColorHsl from 'https://cdn.skypack.dev/postcss-color-hsl';
</script>

README

PostCSS Color Hsl

PostCSS plugin to transform W3C CSS Color Module Level 4 hsl() new syntax to more compatible CSS (comma-separated hsl() or hsla()).

CSS Colors 4 syntax

hsl() = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? )
<hue> = <number> | <angle>
<alpha-value> = <number> | <percentage>

CSS Colors 3 syntax (actual)

hsl()  = hsl( <hue>, <percentage>, <percentage> )
hsla() = hsla( <hue>, <percentage>, <percentage>, <alpha-value> )
<hue> = <number>
<alpha-value> = <number>

Example

.foo {
  /* Input example */
  color: hsl(0 100% 50%);
  border-color: hsl(200grad 100% 50% / 20%);
}

.foo {
  /* Output example */
  color: hsl(0, 100%, 50%);
  border-color: hsla(180, 100%, 50%, .2);
}

Usage

postcss([ require('postcss-color-hsl') ])

See PostCSS docs for examples for your environment.