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6f1ace6 · Sep 10, 2022

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hsl.scss

HSL colors are awesome. Unfortunately, under node-sass the SASS hsl() and hsla() functions converts to other formats (hex or RGB/RGBA). And the situation isn’t better in Dart SASS.

hsl.scss overwrites SASS hsl and hsla with passthrough functions, preserving HSL(A) color declarations without transformation nor validation.

Installation

npm install hsl.scss -D pulls the package into your project.

  • In a node-sass project, @import 'hsl.scss'; in a SCSS files make hsl() and hsla() available.
  • In a Dart SASS project, @use 'hsl.scss' as * is required in every SCSS files where hsl() or hsla() are used.

Usage

You can now expect hsl and hsla to behave like they do using standard CSS:

:root {

  // hsl()
  color: hsl(15deg, 100%, 50%);

  // separator: coma (`,`)
  --flashy-pink: hsl(15deg, 100%, 50%);

  // separator: space
  $flashy-pink: hsl(15deg 100% 50%);

  // hsl() accepts opacity as fourth parameter          👇
  --hue: 15deg;
  --transparent-flashy-pink: hsl(var(--hue), 100%, 50%, .7);

  // hsla()
  $transparent-flashy-pink: hsla(15deg, 100%, 50%, .7); 

  // hsla(): opacity after a slash (`/`) when separator is a space
  $transparent-flashy-pink: hsla(15deg 100% 50% / .7);
}

Before / after hsl.scss when using node-sass

Before: lot of issues. Now: no issues anymore.

Before: boring interpolation. Now: standard CSS.