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Build jQuery UI Droppable - Prevent propagation in JavaScript

Description

The following code shows how to build jQuery UI Droppable - Prevent propagation.

Example


<!-- Revised from demo code on http://jqueryui.com/ -->
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI Droppable - Prevent propagation</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
<link type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/themes/smoothness/jquery-ui.css" rel="stylesheet" />
<!--from  ww  w  . j a  va2s .  c o m-->
<style>
#draggable { width: 100px; height: 40px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }
#droppable, #droppable2 { width: 230px; height: 120px; padding: 0.5em; float: left; margin: 10px; }
#droppable-inner, #droppable2-inner { width: 170px; height: 60px; padding: 0.5em; float: left; margin: 10px; }
</style>
<script>
$(function() {
$( "#draggable" ).draggable();

$( "#droppable, #droppable-inner" ).droppable({
activeClass: "ui-state-hover",
hoverClass: "ui-state-active",
drop: function( event, ui ) {
$( this )
.addClass( "ui-state-highlight" )
.find( "> p" )
.html( "Dropped!" );
return false;
}
});

$( "#droppable2, #droppable2-inner" ).droppable({
greedy: true,
activeClass: "ui-state-hover",
hoverClass: "ui-state-active",
drop: function( event, ui ) {
$( this )
.addClass( "ui-state-highlight" )
.find( "> p" )
.html( "Dropped!" );
}
});
});
</script>
</head>
<body>

<div id="draggable" class="ui-widget-content">
<p>Drag me to my target</p>
</div>

<div id="droppable" class="ui-widget-header">
<p>Outer droppable</p>
<div id="droppable-inner" class="ui-widget-header">
<p>Inner droppable (not greedy)</p>
</div>
</div>

<div id="droppable2" class="ui-widget-header">
<p>Outer droppable</p>
<div id="droppable2-inner" class="ui-widget-header">
<p>Inner droppable (greedy)</p>
</div>
</div>

<div class="demo-description">
<p>When working with nested droppables &#8212; for example, you may have an editable directory structure displayed as a tree, with folder and document nodes &#8212; the <code>greedy</code> option set to true prevents event propagation when a draggable is dropped on a child node (droppable).</p>
</div>
</body>
</html>

Click to view the demo

The code above generates the following result.

Build jQuery UI Droppable - Prevent propagation in JavaScript
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