awesome-auth-client/js/guid.js

var s4;

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

module.exports = function() {
  return s4() + s4() + "-" + s4() + "-" + s4() + "-" + s4() + "-" + s4() + s4() + s4();
};