220104-async-await-example.js

function sleep(miliseconds = 1000) {
  return new Promise((resolve) => setTimeout(resolve, miliseconds));
}

// This will log 'foo' and 'bar' immediately.
async function foo1() {
  console.log('foo');
  sleep();
  console.log('bar');
}

// This will log 'foo', and 'bar' won't be logged until `sleep` is done.
// It's saying 'wait for this, then continue'.
async function foo2() {
  console.log('foo');
  await sleep();
  console.log('bar');
}