RunKit + npm: postcss-preset-env

// Have to import these or runkit can't find them. require('postcss-color-rebeccapurple'); require('postcss-color-functional-notation'); const postcss = require('postcss'); const postcssPresetEnv = require('postcss-preset-env'); const plugins = [ postcssPresetEnv({}) ]; const result = postcss(plugins) .process(`h1 { color: lch(53% 132 257) }`); console.log(result.css);