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---
title: MouseEvent.pageX
slug: Web/API/MouseEvent/pageX
translation_of: Web/API/MouseEvent/pageX
---
<p>{{APIRef("DOM Events")}}</p>
<p> <code><strong>pageX</strong></code> 是一个由{{domxref("MouseEvent")}}接口返回的相对于整个文档的x（水平）坐标以像素为单位的只读属性。</p>
<p>这个属性将基于文档的边缘，考虑任何页面的水平方向上的滚动。举个例子，如果页面向右滚动 200px 并出现了滚动条，这部分在窗口之外，然后鼠标点击距离窗口左边 100px 的位置，pageX 所返回的值将是 300。</p>
<p> 起初这个属性被定义为长整型。 CSSOM 视图模块将它重新定位为双浮点数类型。请参阅浏览器兼容性部分了解详情。</p>
<h2 id="Syntax" name="Syntax">语法</h2>
<pre class="syntaxbox">var <em>pos</em> = <em>event</em>.pageX</pre>
<h2 id="Syntax" name="Syntax">例子</h2>
<pre><em>var pageX</em> = <em>event</em>.pageX;</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th>Specification</th>
<th>Status</th>
<th>Comment</th>
</tr>
<tr>
<td>{{SpecName('CSSOM View', '#dom-mouseevent-pagex', 'pageX')}}</td>
<td>{{Spec2('CSSOM View')}}</td>
<td>Redefined from <code>long</code> to <code>double</code>.</td>
</tr>
<tr>
<td>{{SpecName('Touch Events', '#widl-Touch-pageX', 'pageX')}}</td>
<td>{{Spec2('TouchEvents')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{CompatibilityTable}}</p>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Edge</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari (WebKit)</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatChrome(45.0)}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>9</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
</tr>
<tr>
<td>Redefined from <code>long</code> to <code>double</code></td>
<td>{{CompatChrome(56)}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile" style="line-height: 19.0909080505371px;">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android Webview</th>
<th>Chrome for Android</th>
<th>Edge</th>
<th>Firefox Mobile (Gecko)</th>
<th>Firefox OS</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatChrome(45.0)}}</td>
<td>{{CompatChrome(45.0)}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
</tr>
<tr>
<td>Redefined from <code>long</code> to <code>double</code></td>
<td>{{CompatChrome(56)}}</td>
<td>{{CompatChrome(56)}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<h2 id="参考">参考</h2>
<ul>
<li>{{domxref("UIEvent.pageX")}}</li>
</ul>
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