The mode for testing whether a Draggable element is over the Droppable. Testing is done for both sides of the Draggable and Droppable.

Tolerance can be one of:
- fit - the whole Draggable is over the Droppable;
- intersect - at least half of the Draggable is over the Droppable;
- pointer - the mouse pointer must be over the Droppable;
- touch - the Draggable element overlaps Droppable by at least a pixel.

Defaults to "intersect".

<div id="div2" style="width:100px; height:100px; border:1px solid black;">
    Drop items here...

<script type="text/javascript">
    jQuery(function ($) {
            tolerance: "touch"