files/zh-cn/web/api/globaleventhandlers/ondrag/index.html


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---
title: GlobalEventHandlers.ondrag
slug: Web/API/GlobalEventHandlers/ondrag
translation_of: Web/API/GlobalEventHandlers/ondrag
---
<div>{{ApiRef("HTML DOM")}}</div>

<p>一个{{event("drag")}}事件的{{domxref("GlobalEventHandlers","global event handler")}}。</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">var <var>dragHandler</var> = <var>targetElement</var>.ondrag;
</pre>

<h3 id="返回值">返回值</h3>

<dl>
 <dt><code>dragHandler</code></dt>
 <dd>元素 <code>targetElement</code>的<em>drag</em>事件handler。</dd>
</dl>

<h2 id="例子">例子</h2>

<p>这个例子展示了使用<em>ondrag</em>属性handler设置一个元素的<em>drag</em>事件handler。</p>

<pre class="brush: js">&lt;!DOCTYPE html&gt;
&lt;html lang=en&gt;
&lt;title&gt;Examples of using the ondrag Global Event Attribute&lt;/title&gt;
&lt;meta content="width=device-width"&gt;
&lt;style&gt;
  div {
    margin: 0em;
    padding: 2em;
  }
  #source {
    color: blue;
    border: 1px solid black;
  }
  #target {
    border: 1px solid black;
  }
&lt;/style&gt;
&lt;/head&gt;
&lt;script&gt;
function drag_handler(ev) {
 console.log("Drag");
}

function dragstart_handler(ev) {
 console.log("dragStart");
 ev.dataTransfer.setData("text", ev.target.id);
}

function drop_handler(ev) {
 console.log("Drop");
 ev.currentTarget.style.background = "lightyellow";

 ev.preventDefault();
 var data = ev.dataTransfer.getData("text");
 ev.target.appendChild(document.getElementById(data));
}

function dragover_handler(ev) {
 console.log("dragOver");
 ev.preventDefault();
}
&lt;/script&gt;
&lt;body&gt;
&lt;h1&gt;Examples of &lt;code&gt;ondrag&lt;/code&gt;, &lt;code&gt;ondrop&lt;/code&gt;, &lt;code&gt;ondragstart&lt;/code&gt;, &lt;code&gt;ondragover&lt;/code&gt;&lt;/h1&gt;
 &lt;div&gt; &lt;!-- &lt;div class="source"&gt; --&gt;
   &lt;p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true"&gt;
     Select this element, drag it to the Drop Zone and then release the selection to move the element.&lt;/p&gt;
 &lt;/div&gt;
 &lt;div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);"&gt;Drop Zone&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</pre>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">规范</th>
   <th scope="col">状态</th>
   <th scope="col">备注</th>
  </tr>
  <tr>
   <td>{{SpecName("HTML WHATWG", "indices.html#ix-handler-ondrag", "ondrag")}}</td>
   <td>{{Spec2("HTML WHATWG")}}</td>
   <td></td>
  </tr>
  <tr>
   <td>{{SpecName("HTML5.1", "index.html#ix-handler-ondrag", "ondrag")}}</td>
   <td>{{Spec2("HTML5.1")}}</td>
   <td>初始定义</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>


<p>{{Compat("api.GlobalEventHandlers.ondrag")}}</p>

<h2 id="参考">参考</h2>

<ul>
 <li>{{event("drag")}}</li>
</ul>