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jQuery UI Instance - Dropable

May 08, 2021 jQuery UI

Table of contents

1. jQuery UI Instance - Dropable

2. The default feature

3. Accept

4. Prevent transmission

5. Restore the location of the draggable

6. Shopping cart demo

7. Simple photo manager

8. Visual feedback

jQuery UI Instance - Dropable

Create a target for the dragable widget.

To learn more about the dropable interaction, check out the API documentation for dropable widgets.

The default feature

Enable the dropable feature on any DOM element and create targets for dragable widgets. 

<!doctype html>
<html >
<head>
  <meta charset="utf-8">
  <title>jQuery UI 放置（Droppable） - 默认功能</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="//code.jquery.com/jquery-1.9.1.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <style>
  #draggable { 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();
    $( "#droppable" ).droppable({
      drop: function( event, ui ) {
        $( this )
          .addClass( "ui-state-highlight" )
          .find( "p" )
            .html( "Dropped!" );
      }
    });
  });
  </script>
</head>
<body>
 
<div id="draggable" class="ui-widget-content">
  <p>请把我拖拽到目标处！</p>
</div>
 
<div id="droppable" class="ui-widget-header">
  <p>请放置在这里！</p>
</div>
 
 
</body>
</html>

Accept

Use accept option to specify which element (or group of elements) the target droppable accepts. 

<!doctype html>
<html >
<head>
  <meta charset="utf-8">
  <title>jQuery UI 放置（Droppable） - 接受</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="//code.jquery.com/jquery-1.9.1.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <style>
  #droppable { width: 150px; height: 150px; padding: 0.5em; float: left; margin: 10px; }
  #draggable, #draggable-nonvalid { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }
  </style>
  <script>
  $(function() {
    $( "#draggable, #draggable-nonvalid" ).draggable();
    $( "#droppable" ).droppable({
      accept: "#draggable",
      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-nonvalid" class="ui-widget-content">
  <p>我是不能被放置的 draggable</p>
</div>
 
<div id="draggable" class="ui-widget-content">
  <p>请拖拽我到目标</p>
</div>
 
<div id="droppable" class="ui-widget-header">
  <p>accept: '#draggable'</p>
</div>
 
 
</body>
</html>

Prevent transmission

When using nested dropables - for example, you can have a tree-shaped editable directory structure with greedy set to true to prevent the propagation of events when dragable is placed on a child node. 

<!doctype html>
<html >
<head>
  <meta charset="utf-8">
  <title>jQuery UI 放置（Droppable） - 防止传播</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="//code.jquery.com/jquery-1.9.1.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <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>请拖拽我到目标</p>
</div>
 
<div id="droppable" class="ui-widget-header">
  <p>外部 droppable</p>
  <div id="droppable-inner" class="ui-widget-header">
    <p>内部 droppable（不带有 greedy）</p>
  </div>
</div>
 
<div id="droppable2" class="ui-widget-header">
  <p>外部 droppable</p>
  <div id="droppable2-inner" class="ui-widget-header">
    <p>内部 droppable（带有 greedy）</p>
  </div>
</div>
 
 
</body>
</html>

Restore the location of the draggable

When dragable with revert option stops dragging, return dragable (or its assistant) to its original position. 

<!doctype html>
<html >
<head>
  <meta charset="utf-8">
  <title>jQuery UI 放置（Droppable） - 还原 draggable 的位置</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="//code.jquery.com/jquery-1.9.1.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <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>

Shopping cart demo

Demonstrates how to use a folding panel to show the catalog structure of a product, and use drag and drop to add products to a shopping cart, where the products are sortable. 

<!doctype html>
<html >
<head>
  <meta charset="utf-8">
  <title>jQuery UI 放置（Droppable） - 购物车演示</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="//code.jquery.com/jquery-1.9.1.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <style>
  h1 { padding: .2em; margin: 0; }
  #products { float:left; width: 500px; margin-right: 2em; }
  #cart { width: 200px; float: left; margin-top: 1em; }
  /* 定义列表样式，以便最大化 droppable */
  #cart ol { margin: 0; padding: 1em 0 1em 3em; }
  </style>
  <script>
  $(function() {
    $( "#catalog" ).accordion();
    $( "#catalog li" ).draggable({
      appendTo: "body",
      helper: "clone"
    });
    $( "#cart ol" ).droppable({
      activeClass: "ui-state-default",
      hoverClass: "ui-state-hover",
      accept: ":not(.ui-sortable-helper)",
      drop: function( event, ui ) {
        $( this ).find( ".placeholder" ).remove();
        $( "<li></li>" ).text( ui.draggable.text() ).appendTo( this );
      }
    }).sortable({
      items: "li:not(.placeholder)",
      sort: function() {
        // 获取由 droppable 与 sortable 交互而加入的条目
        // 使用 connectWithSortable 可以解决这个问题，但不允许您自定义 active/hoverClass 选项
        $( this ).removeClass( "ui-state-default" );
      }
    });
  });
  </script>
</head>
<body>
 
<div id="products">
  <h1 class="ui-widget-header">产品</h1>
  <div id="catalog">
    <h2><a href="#">T-Shirts</a></h2>
    <div>
      <ul>
        <li>Lolcat Shirt</li>
        <li>Cheezeburger Shirt</li>
        <li>Buckit Shirt</li>
      </ul>
    </div>
    <h2><a href="#">Bags</a></h2>
    <div>
      <ul>
        <li>Zebra Striped</li>
        <li>Black Leather</li>
        <li>Alligator Leather</li>
      </ul>
    </div>
    <h2><a href="#">Gadgets</a></h2>
    <div>
      <ul>
        <li>iPhone</li>
        <li>iPod</li>
        <li>iPad</li>
      </ul>
    </div>
  </div>
</div>
 
<div id="cart">
  <h1 class="ui-widget-header">购物车</h1>
  <div class="ui-widget-content">
    <ol>
      <li class="placeholder">添加产品到这里</li>
    </ol>
  </div>
</div>
 
 
</body>
</html>

Simple photo manager

You can delete photos by dragging them to the recycle bin or by tapping the recycle bin icon.

You can restore a photo by dragging it to an album or by tapping the recycle icon.

You can view the graph by clicking on the zoom icon. The jQuery UI dialog part is used for modal windows. 

<!doctype html>
<html >
<head>
  <meta charset="utf-8">
  <title>jQuery UI 放置（Droppable） - 简单的照片管理器</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="//code.jquery.com/jquery-1.9.1.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <style>
  #gallery { float: left; width: 65%; min-height: 12em; }
  .gallery.custom-state-active { background: #eee; }
  .gallery li { float: left; width: 96px; padding: 0.4em; margin: 0 0.4em 0.4em 0; text-align: center; }
  .gallery li h5 { margin: 0 0 0.4em; cursor: move; }
  .gallery li a { float: right; }
  .gallery li a.ui-icon-zoomin { float: left; }
  .gallery li img { width: 100%; cursor: move; }
 
  #trash { float: right; width: 32%; min-height: 18em; padding: 1%; }
  #trash h4 { line-height: 16px; margin: 0 0 0.4em; }
  #trash h4 .ui-icon { float: left; }
  #trash .gallery h5 { display: none; }
  </style>
  <script>
  $(function() {
    // 这是相册和回收站
    var $gallery = $( "#gallery" ),
      $trash = $( "#trash" );
 
    // 让相册的条目可拖拽
    $( "li", $gallery ).draggable({
      cancel: "a.ui-icon", // 点击一个图标不会启动拖拽
      revert: "invalid", // 当未被放置时，条目会还原回它的初始位置
      containment: "document",
      helper: "clone",
      cursor: "move"
    });
 
    // 让回收站可放置，接受相册的条目
    $trash.droppable({
      accept: "#gallery > li",
      activeClass: "ui-state-highlight",
      drop: function( event, ui ) {
        deleteImage( ui.draggable );
      }
    });
 
    // 让相册可放置，接受回收站的条目
    $gallery.droppable({
      accept: "#trash li",
      activeClass: "custom-state-active",
      drop: function( event, ui ) {
        recycleImage( ui.draggable );
      }
    });
 
    // 图像删除功能
    var recycle_icon = "<a href='link/to/recycle/script/when/we/have/js/off' title='还原图像' class='ui-icon ui-icon-refresh'>还原图像</a>";
    function deleteImage( $item ) {
      $item.fadeOut(function() {
        var $list = $( "ul", $trash ).length ?
          $( "ul", $trash ) :
          $( "<ul class='gallery ui-helper-reset'/>" ).appendTo( $trash );
 
        $item.find( "a.ui-icon-trash" ).remove();
        $item.append( recycle_icon ).appendTo( $list ).fadeIn(function() {
          $item
            .animate({ width: "48px" })
            .find( "img" )
              .animate({ height: "36px" });
        });
      });
    }
 
    // 图像还原功能
    var trash_icon = "<a href='link/to/trash/script/when/we/have/js/off' title='删除图像' class='ui-icon ui-icon-trash'>删除图像</a>";
    function recycleImage( $item ) {
      $item.fadeOut(function() {
        $item
          .find( "a.ui-icon-refresh" )
            .remove()
          .end()
          .css( "width", "96px")
          .append( trash_icon )
          .find( "img" )
            .css( "height", "72px" )
          .end()
          .appendTo( $gallery )
          .fadeIn();
      });
    }
 
    // 图像预览功能，演示 ui.dialog 作为模态窗口使用
    function viewLargerImage( $link ) {
      var src = $link.attr( "href" ),
        title = $link.siblings( "img" ).attr( "alt" ),
        $modal = $( "img[src$='" + src + "']" );
 
      if ( $modal.length ) {
        $modal.dialog( "open" );
      } else {
        var img = $( "<img alt='" + title + "' width='384' height='288' style='display: none; padding: 8px;' />" )
          .attr( "src", src ).appendTo( "body" );
        setTimeout(function() {
          img.dialog({
            title: title,
            width: 400,
            modal: true
          });
        }, 1 );
      }
    }
 
    // 通过事件代理解决图标行为
    $( "ul.gallery > li" ).click(function( event ) {
      var $item = $( this ),
        $target = $( event.target );
 
      if ( $target.is( "a.ui-icon-trash" ) ) {
        deleteImage( $item );
      } else if ( $target.is( "a.ui-icon-zoomin" ) ) {
        viewLargerImage( $target );
      } else if ( $target.is( "a.ui-icon-refresh" ) ) {
        recycleImage( $item );
      }
 
      return false;
    });
  });
  </script>
</head>
<body>
 
<div class="ui-widget ui-helper-clearfix">
 
<ul id="gallery" class="gallery ui-helper-reset ui-helper-clearfix">
  <li class="ui-widget-content ui-corner-tr">
    <h5 class="ui-widget-header">High Tatras</h5>
    <img src="https://atts.w3cschool.cn/attachments/uploads/2014/03/high_tatras_min.jpg" alt="High Tatras 的最高峰" width="96" height="72">
    <a href="/attachments/uploads/2014/03/high_tatras.jpg" title="查看大图" class="ui-icon ui-icon-zoomin">查看大图</a>
    <a href="link/to/trash/script/when/we/have/js/off" title="删除图像" class="ui-icon ui-icon-trash">删除图像</a>
  </li>
  <li class="ui-widget-content ui-corner-tr">
    <h5 class="ui-widget-header">High Tatras 2</h5>
    <img src="https://atts.w3cschool.cn/attachments/uploads/2014/03/high_tatras2_min.jpg" alt="绿山湖畔的小屋" width="96" height="72">
    <a href="/attachments/uploads/2014/03/high_tatras2.jpg" title="查看大图" class="ui-icon ui-icon-zoomin">查看大图</a>
    <a href="link/to/trash/script/when/we/have/js/off" title="删除图像" class="ui-icon ui-icon-trash">删除图像</a>
  </li>
  <li class="ui-widget-content ui-corner-tr">
    <h5 class="ui-widget-header">High Tatras 3</h5>
    <img src="https://atts.w3cschool.cn/attachments/uploads/2014/03/high_tatras3_min.jpg" alt="计划登高" width="96" height="72">
    <a href="/attachments/uploads/2014/03/high_tatras3.jpg" title="查看大图" class="ui-icon ui-icon-zoomin">查看大图</a>
    <a href="link/to/trash/script/when/we/have/js/off" title="删除图像" class="ui-icon ui-icon-trash">删除图像</a>
  </li>
  <li class="ui-widget-content ui-corner-tr">
    <h5 class="ui-widget-header">High Tatras 4</h5>
    <img src="https://atts.w3cschool.cn/attachments/uploads/2014/03/high_tatras4_min.jpg" alt="在 Kozi kopka 的顶部" width="96" height="72">
    <a href="/attachments/uploads/2014/03/high_tatras4.jpg" title="查看大图" class="ui-icon ui-icon-zoomin">查看大图</a>
    <a href="link/to/trash/script/when/we/have/js/off" title="删除图像" class="ui-icon ui-icon-trash">删除图像</a>
  </li>
</ul>
 
<div id="trash" class="ui-widget-content ui-state-default">
  <h4 class="ui-widget-header"><span class="ui-icon ui-icon-trash">回收站</span> 回收站</h4>
</div>
 
</div>
 
 
</body>
</html>

Visual feedback

Change the appearance of the droppable when hovering over it, or when the droppable is activated (i.e., an acceptable dragable is placed on the droppable). Use hoverClass or activeClass to specify class separately. 

<!doctype html>
<html >
<head>
  <meta charset="utf-8">
  <title>jQuery UI 放置（Droppable） - 视觉反馈</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <script src="//code.jquery.com/jquery-1.9.1.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css" rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank"  rel="external nofollow" target="_blank" >
  <style>
  #draggable, #draggable2 { width: 90px; height: 90px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }
  #droppable, #droppable2 { width: 120px; height: 120px; padding: 0.5em; float: left; margin: 10px; }
  h3 { clear: left; }
  </style>
  <script>
  $(function() {
    $( "#draggable" ).draggable();
    $( "#droppable" ).droppable({
      hoverClass: "ui-state-hover",
      drop: function( event, ui ) {
        $( this )
          .addClass( "ui-state-highlight" )
          .find( "p" )
            .html( "Dropped!" );
      }
    });
 
    $( "#draggable2" ).draggable();
    $( "#droppable2" ).droppable({
      accept: "#draggable2",
      activeClass: "ui-state-default",
      drop: function( event, ui ) {
        $( this )
          .addClass( "ui-state-highlight" )
          .find( "p" )
            .html( "Dropped!" );
      }
    });
  });
  </script>
</head>
<body>
 
<h3>当悬停在 droppable 上时的反馈：</h3>
 
<div id="draggable" class="ui-widget-content">
  <p>请拖拽我到目标</p>
</div>
 
<div id="droppable" class="ui-widget-header">
  <p>请放置在这里</p>
</div>
 
<h3>当激活 draggable 时的反馈：</h3>
 
<div id="draggable2" class="ui-widget-content">
  <p>请拖拽我到目标</p>
</div>
 
<div id="droppable2" class="ui-widget-header">
  <p>请放置在这里</p>
</div>
 
 
</body>
</html>


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