> For the complete documentation index, see [llms.txt](https://javascript-1.gitbook.io/javascript/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://javascript-1.gitbook.io/javascript/async-await.md).

# Async Await

It is introduce in ES8, is built on top of Promises.

Async function is a function that returns Promise. The benefit is, it makes code more readable.

The goal of async is to make the code look synchronous, an asynchronous code look synchronous.

Async Await are just promises under neat the hood, we called it syntactic sugar.

```javascript
EX 1:
async function playerStart() {
    const firstMove = await move(400, 'Left');
    await move(400, 'Right');
    await move(400, 'Up');
    await move(400, 'Down');
}
```

```javascript
EX 2:
// Basic usage
fetch('https://jsonplaceholder.typicode.com/users')
    .then(res => res.json())
    .then(console.log);
    
// using ASYNC AWAIT
async function getUsers() {
    const res = await fetch('https://jsonplaceholder.typicode.com/users')
    const data = await res.json();
    console.log(data); // response
}
```

```javascript
EX 3:
const urls = [
    'https://jsonplaceholder.typicode.com/users',
    'https://jsonplaceholder.typicode.com/posts',
    'https://jsonplaceholder.typicode.com/albums'
];

// Basic usage
Promise.all(urls.map(url => {
        fetch(url).then(res => res.json());
    }))
    .then(array => {
        console.log('users', array[0]);
        console.log('posts', array[1]);
        console.log('albums', array[2]);
    })
    .catch(console.log);
    
// using ASYNC AWAIT
const getDatas = async function() {
    try {
        const [users, posts, albums] = await Promise.all(urls.map(url => {
            return fetch(url).then(res => res.json());
        }));
        console.log('users', users);
        console.log('posts', posts);
        console.log('albums', albums);
    } catch(err) {
        console.log(err);
    }
}
getDatas();
```