Async forEach Pattern

asyncforeach.js

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

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

const start = async () => {
  await asyncForEach([1, 2, 3, 4, 5], async (num) => {
    await waitFor(1000);
    console.log(num);
  });
  console.log('Done');
}

start();