const order = [];
const log = (s) => order.push(s);

log('start');

Promise.resolve().then(() => {
  log('p1');
  return Promise.resolve();
}).then(() => log('p1-2'));

async function foo() {
  log('foo-start');
  await null;
  log('foo-end');
}

foo();

Promise.resolve().then(() => log('p2'));

log('end');

setTimeout(() => console.log(order.join(' ')), 0);