@ichong/px-to-viewport/src/pixel-unit-regexp.js

A CSS post-processor that converts px to viewport units (vw, vh, vmin, vmax)

function getUnitRegexp(unit) {
    return new RegExp('"[^"]+"|\'[^\']+\'|url\\([^\\)]+\\)|(\\d*\\.?\\d+)' + unit, 'g');
  }
  
  module.exports = {
    getUnitRegexp
  };