JavaScript: async/await with forEach()

async-foreach.js

const waitFor = (ms) => new Promise(r => setTimeout(r, ms))
const asyncForEach = async (array, callback) => {
  for (let index = 0; index < array.length; index++) {
    await callback(array[index], index, array)
  }
}

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

start()

Why not use for await()?

const waitFor = (ms) => new Promise(r => setTimeout(r, ms))
const start = async () => {
  for await (num of [1, 2, 3]) {
    await waitFor(50)
    console.log(num)
  };
  console.log('Done')
}
start()

More info here