async-forEach.js

var 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)  
  }
}
var start = async () => {  
  let state = 0  
  await asyncForEach([1, 2, 3], async (num) => {    
    await waitFor(1000)    
    console.log(num)    
    state = state + num  
  })  
  console.log('Done')  
  return state
}

start().then((res) => {  
  console.log(res)
})