browser nextTick

index.js

// try it in your browser

(function() {
  requestAnimationFrame(() => console.log('requestAnimationFrame'))
  setTimeout(() => console.log('setTimeout 10'), 10);
  setTimeout(() => console.log('setTimeout 1'), 1);
  setTimeout(() => console.log('setTimeout 0'), 0);
  Promise.resolve().then(() => console.log('then'));
  console.log('content end');
  return 'fn end';
})()