# core/async/modules/proxy
This module provides common proxy wrappers for the Async API, like, `proxy`, `worker` and `promise`.
```js
import Async from 'core/async';
const
watcher = new Async(),
img = new Image();
img.onload = watcher.proxy(() => {
console.log('done');
});
img.src = 'bla.jpg';
```