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Open Source CSS Variables

colors gradients shadows aspect ratios typography
easings animations sizes borders z-indexes media-queries

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javascript: (() => {
  const href = "";


  • npm run gen:op - runs through src/ js files and creates the PostCSS files in src/
  • npm run gen:nowhere - creates a version of Open Props without the use of :where()
  • npm run gen:shadowdom - creates a version of Open Props with :host as the selector scope
  • npm run gen:prefixed - creates a version of Open Props with each prop prefixed with op, like --op-font-size-1
  • npm run bundle - creates all the various minified bundles of props
  • npm run lib:js - builds the JS modules for NPM