<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI 放置（Droppable） - 还原 draggable 的位置</title>
<link rel="stylesheet" href="https://libs.baidu.com/jqueryui/1.10.4/css/jquery-ui.min.css">
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script src="https://libs.baidu.com/jqueryui/1.10.4/jquery-ui.min.js"></script>
<link rel="stylesheet" href="/demo/jqueryui/style.css">
<style>
#draggable, #draggable2 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }
#droppable { width: 150px; height: 150px; padding: 0.5em; float: left; margin: 10px; }
</style>
<script>
$(function() {
$( "#draggable" ).draggable({ revert: "valid" });
$( "#draggable2" ).draggable({ revert: "invalid" });
$( "#droppable" ).droppable({
activeClass: "ui-state-default",
hoverClass: "ui-state-hover",
drop: function( event, ui ) {
$( this )
.addClass( "ui-state-highlight" )
.find( "p" )
.html( "已放置！" );
}
});
});
</script>
</head>
<body>
<div id="draggable" class="ui-widget-content">
<p>当被放置在目标上时还原</p>
</div>
<div id="draggable2" class="ui-widget-content">
<p>当未被放置在目标上时还原</p>
</div>
<div id="droppable" class="ui-widget-header">
<p>请放置在这里</p>
</div>
</body>
</html>