a little async/await promise test

async-await-xhr.js

var pbj = {}
pbj.xhr = url => {
  return new Promise((resolve, reject) => {
    const xhr = new XMLHttpRequest();
    xhr.open('GET', 'https://reqres.in' + url);
    xhr.onload = () => resolve(xhr.response);
    xhr.onerror = () => reject(xhr.status);
    xhr.send();
  })
}
pbj.load = async function (config) {
  console.log(config)

  var cfg = Object.values(config),
    cfg = cfg.sort(() => Math.random() - 0.5),
    url = cfg[0];
  console.log(url)
  var a = await pbj.xhr(url);

  return {
    a: a,
    b: 'b',
    c: {}
  }
}
pbj.config = {
  opt0: '/api/users/2',
  opt1: '/api/users?delay=3',
  opt2: '/api/unknown/404'
};
pbj.load(pbj.config).then(payload => {
  console.log(payload)
});