Using promise.all.js

// Vi bruker samme get-funksjon som i forrige eksempel
function get(path) {
  return new Promise((resolve, reject) => {
    var request = new XMLHttpRequest();

    // Ved suksess sendes responsen til resolve()
    request.addEventListener('load', (e) => {
      resolve(JSON.parse(e.target.responseText));
    });

    // Ved feil sendes responsen til reject()
    request.addEventListener('error', (e) => {
      reject(e.target.statusText || 'unknown error');
    });

    // Ved abort sender til bare til resolve()
    request.addEventListener('abort', resolve);
    request.open('get', path);
    request.send();
  });
}

console.time('get');
let promises = [];
promises.push(get('//jspromises.herokuapp.com/search/promises'));
promises.push(get('//jspromises.herokuapp.com/search/js'));

Promise.all(promises).then((value) => {
  console.timeEnd('get');
  document.querySelector(".result")
    .appendChild(document.createElement('div'))
    .textContent = value[0].results[0].text;
  document.querySelector(".result")
    .appendChild(document.createElement('div'))
    .textContent = value[1].results[0].text;
}).catch((error)=> {
  console.timeEnd('get');
  console.error(error);
});