test-async-await.js

const delayed_yeah = () => {
  console.log('delayed_yeah!')
  return new Promise((resolve, reject) => {
    setTimeout(() => resolve('yeah!'), 2000)
  })
}

const delayed_hi = () => {
  console.log('delayed_hi!')
  return new Promise((resolve, reject) => {
    setTimeout(() => resolve('hi!'), 2000)
  })
}

const awfn = async () => {
  console.log('before delayed yeah')
  const yeah = await delayed_yeah()
  console.log('before delayed hi')
  const hi = await delayed_hi()
  console.log(yeah, hi)
}

let counter = 0
const timeout = setInterval(() => {
  if (counter === 5) awfn()
  console.log(counter)
  counter++
}, 1000)

setTimeout(() => clearInterval(timeout), 10000)