JavaScript: async/await with forEach()

async-foreach.js

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

// forEach() async loop
const asyncForEach = async (array, callback) => {
  for (let index = 0; index < array.length; index++) {
    await callback(array[index], index, array)
  }
}

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

Async Iteration over an array with 50ms of delay

this a good implementation of asynchronous operation with async await. DId you leave calling the IIFE in the end intentionally ?