## Blur event

Triggered when the `Element` loses focus.

**Syntax:** `element.on(...)`

- `event` ('blur') **required**
  The name of the event.
In this case, `blur`.

- `handler` (function) **required**
  `handler(event) => void` is a **callback function** that you provide that will be called when the event is fired.

### Handle an Element blur event

```js
element.on('blur', function(event) {
  // Handle blur event
});
```

```es_next
element.on('blur', (event) => {
  // Handle blur event
});
```