> For the complete documentation index, see [llms.txt](https://dexiejs.typogram.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dexiejs.typogram.co/dexie/dexie.async.md).

# Dexie.async()

#### Syntax

```javascript
var myAsyncFunction = Dexie.async(function* () {
    // Function body goes here.
    // To await, use the yield keyword.
});
```

#### Return Value

Function

#### Description

Makes it possible to use async functions with modern browsers (Chrome, Firefox, Opera and Edge) without the need of a transpiler.

Table below shows how this maps to ES7 async / await.

|                           | Using function\*() and yield   | Using async / await     |
| ------------------------- | ------------------------------ | ----------------------- |
| Declare async function    | Dexie.async(function\* () {}); | async function() {}     |
| Declare+execute function  | Dexie.spawn(function\* () {}); | (async function() {})() |
| Await a Promise           | yield p;                       | await p;                |
| Declare Promise Generator | function\* f (){}              | N/A                     |
| Await Promise Generator   | yield\* fn();                  | N/A                     |

#### Sample

```javascript
var myAsyncFunction = Dexie.async(function* () {
    var db = new Dexie("TestDB");
    db.version(1).stores({foo: ',bar'});
    try {
        yield Dexie.delete("TestDB");
        yield db.open();
        yield db.foo.add({bar: "foobar"}, 1);
        var items = yield db.foo.toArray();
        console.log(items.length);
    } finally {
        db.close();
    }
});

myAsyncFunction().catch(e => console.error(e));
```

#### See Also

Dexie.spawn()