Simple example of async foreach

AsyncForEach.js

async function asyncForEach(array, callback) {
  for (let index = 0; index < array.length; index++) {
    await callback(array[index], index, array);
  }
}

const waitFor = ms => new Promise(r => setTimeout(r, ms));

asyncForEach([1, 2, 3], async num => {
  await waitFor(50);
  console.log(num);
})