---
title: Touch.clientY
slug: Web/API/Touch/clientY
translation_of: Web/API/Touch/clientY
---
<p>{{ ApiRef() }}</p>
<h3 id="Summary" name="Summary">概述</h3>
<p>返回触点相对于可见视区(<a class="external" href="http://www.quirksmode.org/mobile/viewports2.html">visual viewport</a>)上边沿的的Y坐标. 不包括任何滚动偏移.这个值会根据用户对可见视区的缩放行为而发生变化.</p>
<h3 id="Syntax" name="Syntax">语法</h3>
<pre class="eval">var <span style="font-style: italic;">y</span> = <em>touchItem</em>.clientY;
</pre>
<h3 id="Return_Value" name="Return_Value">返回值</h3>
<dl>
 <dt>
  <code>y</code></dt>
 <dd>
  返回触点相对于可见视区(<a class="external" href="http://www.quirksmode.org/mobile/viewports2.html">visual viewport</a>)上边沿的的Y坐标. 不包括任何滚动偏移.</dd>
</dl>
<h3 id="Specification" name="Specification">标准定义</h3>
<p><a class="external" href="http://www.w3.org/TR/touch-events/">Touch Events Specification</a></p>
<h3 id="相关链接">相关链接</h3>
<ul>
 <li>{{ domxref("Touch.clientX") }}</li>
 <li>{{ domxref("Touch.screenY") }}</li>
 <li>{{ domxref("Touch.pageY") }}</li>
</ul>