Simple color function remover.

Useful for apply after postcss-color-function and postcss-custom-properties with preserve: true option, or after cssnext with some options.

$ npm install postcss-color-function-remover

const {readFileSync, writeFile} = require("fs");
const postcss = require("postcss");
const cssnext = require("cssnext");
const colorFunctionRemover = require("postcss-color-function-remover");

postcss([
    cssnext({
        features: {
            customProperties: {
                preserve: true
            }
        }
    }),
    colorFunctionRemover()
])
    .process(readFileSync("input.css", "utf8"))
    .then(result => {
        fs.writeFile('output.css', result.css);
    });