This one requires a bit of explaining, it doesn't only check for 'visibility'.

- Checks that the node isn't off screen.
- Or that it's `display` property isn't set to `none`.
- Or that `overflow` isn't set to `hidden` and ensures the `height` and `width` are larger than 0.

```javascript
var myNode = el('div', {
  style : {
    position : 'absolute',
    left : 0,
    top : 0
  }
}).appendTo(document.body);

myFocus.isVisible(); [top](#methods)
// -> true

myFocus.style('left', -100000);

myFocus.isVisible();
// -> false
```

Or

```javascript
var myNode = el('div').appendTo(document.body);

myFocus.isVisible();
// -> true

myFocus.style('display', 'none');

myFocus.isVisible();
// -> false
```

The idea here is that this check is smart, so it knows whether the node is visible or not in various contexts.