infantito

// code: https://twitter.com/joelnet/status/1231994830798061568
const sum = (a, b) => Promise.resolve(a + b);
const subtract = (a, b) => Promise.resolve(a - b);

// Promises
const promises = async () => {
  const p1 = sum(7, 3);
  const p2 = sum(8, 5);

  return Promise.all([p1, p2]);

infantito

let url = 'https://jsonplaceholder.typicode.com';
let buttonAjax = document.querySelector('.buttonAjax');

buttonAjax.addEventListener('click', doSomething);

function doSomething() {
  console.log('do something more...');
  return getAjax(callback, 'users', anotherAjax);
}