Question: I have a draggable object (div), and some droppable ones (table TD's). I want the user to drag my draggable object to one of those droppable TD's.

I enable draggable and droppable this way:

```
$(".draggable").draggable();
$(".droppable").droppable();

```

The problem is that with this the user can drag the div anywhere on the screen, including out of the droppable area.

How can I limit the boundary area for the draggable object?

Answer: 
Use the "containment" option:

[jQuery UI API - Draggable Widget - containment](https://api.jqueryui.com/draggable/#option-containment)

The documentation says it only accepts the values: `'parent'`, `'document'`, `'window'`, `[x1, y1, x2, y2]` but I seem to remember it will accept a selector such as '#container' too.
```
$(function () {
    $( ".droppable-area" ).sortable({
                connectWith: ".connected-sortable",
                containment: ".droppable-area", //(parent div)
                stack: '.connected-sortable div'
            }).disableSelection();
});

```