UUID Generator

UUIDGenerator.js

// https://medium.com/@ideepak.jsd/javascript-generator-yield-next-async-await-e428b0cb52e4
function* UUIDGenerator() {
  let d, r;
  while (true) {
    yield 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
      r = (new Date().getTime() + Math.random() * 16) % 16 | 0;
      d = Math.floor(d / 16);
      return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
    });
  }
}