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


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

<p> {{event("pointerdown")}} 事件的 {{domxref("GlobalEventHandlers","全局事件处理程序")}} </p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">var <var>downHandler</var> = <var>targetElement</var>.onpointerdown;
</pre>

<h3 id="返回值">返回值</h3>

<dl>
 <dt><code>downHandler</code></dt>
 <dd><em>pointerdown</em> 事件触发对象的事件处理程序.</dd>
</dl>

<h2 id="示例">示例</h2>

<p>当前示例展示两种方式使用 <em>onpointerdown </em>去设置元素的pointerdown事件处理程序.</p>

<pre class="brush: js">&lt;html&gt;
&lt;script&gt;
function downHandler(ev) {
 // Process the pointerdown event
}
function init() {
 var el=document.getElementById("target1");
 el.onpointerdown = downHandler;
}
&lt;/script&gt;
&lt;body onload="init();"&gt;
&lt;div id="target1"&gt; Touch me ... &lt;/div&gt;
&lt;div id="target2" onpointerdown="downHandler(event)"&gt; Touch me ... &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">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('Pointer Events 2','#widl-GlobalEventHandlers-onpointerdown', 'onpointerdown')}}</td>
   <td>{{Spec2('Pointer Events 2')}}</td>
   <td>Non-stable version</td>
  </tr>
  <tr>
   <td>{{SpecName('Pointer Events', '#widl-GlobalEventHandlers-onpointerdown', 'onpointerdown')}}</td>
   <td>{{Spec2('Pointer Events')}}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器支持">浏览器支持</h2>

{{Compat("api.GlobalEventHandlers.onpointerdown")}}

<h2 id="sect1"> </h2>

<h2 id="参阅">参阅</h2>

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