ES7 async

es7_async.js

function get(url) {
  return new Promise(function(resolve, reject) {
    var req = new XMLHttpRequest();
    
    req.open('GET', url);
    req.setRequestHeader('User-Agent', 'mralexgray');
    req.onload = function() {
      if (req.status == 200) {
        resolve(JSON.parse(req.response));
      }
      else {
        reject(Error(req.statusText));
      }
    };

    req.onerror = function() {
      reject(Error("Network Error"));
    };

    req.send();
  });
}

var params = '?client_id=5d55f8b2c81b86fc413c&client_secret=f816768d68ca421eef677743218db6e768bc93f6';

//ES7 async/await
(async function() {
  let res = await get('https://api.github.com/users/mralexgray/repos' +params)
  let res2 = await get('https://api.github.com/users/alyssaq/repos' +params)
  alert('ES7: ' + res[0].full_name + ',\n' + res2[0].full_name)
  try {
    let res2 = await get('https://api.github.com/rubbish' +params)
    //alert('ES7 GOOD: ' + err)
  } catch (err) {
    alert('ES7 BAD: ' + err)
  }
}());

//ES6 Promises
get('https://api.github.com/users/mralexgray/repos' +params).then(function (res) {
  get('https://api.github.com/users/alyssaq/repos' +params).then(function (res2) {
    //alert('ES6: ' + res[0].full_name + ',\n'+ res2[0].full_name)
    get('https://api.github.com/rubbish' +params).then(function (res3) {
      //alert('ES6 GOOD: ' + err)
    }).catch(function (err){
      //alert('ES6 BAD: ' + err)
    })
  })
})