在线运行代码 - 菜鸟教程

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>可放置小部件（Droppable Widget）演示</title>
  <link rel="stylesheet" href="https://apps.bdimg.com/libs/jqueryui/1.10.4/css/jquery-ui.min.css">
  <style>#draggable {
    width: 100px;
    height: 100px;
    background: #ccc;
  }
  #droppable {
    position: absolute;
    left: 250px;
    top: 0;
    width: 125px;
    height: 125px;
    background: #999;
    color: #fff;
    padding: 10px;
  }
  </style>
  <script src="https://apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js"></script>
  <script src="https://apps.bdimg.com/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
</head>
<body>
 
<div id="droppable">请放置到这里！</div>
<div id="draggable">请拖拽我！</div>
 
<script>
$( "#draggable" ).draggable();
$( "#droppable" ).droppable({
  drop: function() {
    alert( "dropped" );
  }
});
</script>
 
</body>
</html>
源代码

动行结果
