prejss/src/utils/guid.js

Get the power of PostCSS with plugins in your JSS styles. 🎨 Just put CSS into JS and get it as JSS object.

export default function() {
  function s4() {
    return Math.floor((1 + Math.random()) * 0x10000)
      .toString(16)
      .substring(1);
  }
  return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
    s4() + '-' + s4() + s4() + s4();
}