<pre><code class="lang-javascript">console.log('Test start');
setTimeout(() =&gt; console.log('0 sec timer'), 0);
Promise.resolve('Resolved promise 1').then(res =&gt; console.log(res));

Promise.resolve('Resolved promise 2').then(res =&gt; {
 for (let i = 0; i &lt; 1000000000; i++) {}
 console.log(res);
});

console.log('Test end');
</code></pre>
Order
<img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1660803166981/jzFu-nzrB.PNG" alt="event loop.PNG" />

```javascript
console.log('Test start');
setTimeout(() => console.log('0 sec timer'), 0);
Promise.resolve('Resolved promise 1').then(res => console.log(res));

Promise.resolve('Resolved promise 2').then(res => {
 for (let i = 0; i < 1000000000; i++) {}
 console.log(res);
});

console.log('Test end');
```

Order


![event loop.PNG](https://cdn.hashnode.com/res/hashnode/image/upload/v1660803166981/jzFu-nzrB.PNG align="left")

[JavaScript] Asynchronous JavaScript: Promises, Async/Await, and AJAX - The Event Loop in Practice