blockingAwait.js

#!/usr/bin/env node

const delay = ms => new Promise(resolve => setTimeout(resolve, ms));

const countdown = async () => {
  await delay(5000)
  console.log("hello world")
}

countdown()
console.log("bye world. Although out of order, notice how application does not exit until final await.")

Output:

$ node blockingAwait.js
bye world. Although out of order, notice how application does not exit until final await.
hello world