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---
title: WheelEvent.deltaZ
slug: Web/API/WheelEvent/deltaZ
translation_of: Web/API/WheelEvent/deltaZ
---
<p>{{APIRef("DOM Events")}}</p>
<p> </p>
<p><code><strong>WheelEvent.deltaZ</strong></code> 只读属性是一个 <code>double</code> 类型值, 声明 Z 轴滚动量以<a href="https://developer.mozilla.org/zh-CN/docs/Web/API/WheelEvent/deltaMode" title="WheelEvent.deltaMode 只读属性返回一个 unsigned long 类型的值, 声明 delta 的滚动值的单位. 可能的值为:"><code>WheelEvent.deltaMode</code></a> 为单位.</p>
<p> </p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">var <code><em>dZ</em> = <em>event</em>.deltaZ;</code></pre>
<h2 id="例子">例子</h2>
<pre class="brush: js">var syntheticEvent = new WheelEvent("syntheticWheel", {"deltaZ": 4, "deltaMode": 0});
console.log(syntheticEvent.deltaZ);
</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('DOM3 Events','#widl-WheelEvent-deltaZ','WheelEvent.deltaZ')}}</td>
<td>{{Spec2('DOM3 Events')}}</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>31</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{ CompatGeckoDesktop("17.0") }}</td>
<td>{{ CompatIE("9.0") }} [1]</td>
<td>18</td>
<td>{{ CompatNo() }}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Edge</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Phone</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{ CompatVersionUnknown() }}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{ CompatGeckoMobile("17.0") }}</td>
<td>{{ CompatUnknown() }}</td>
<td>{{ CompatVersionUnknown() }}</td>
<td>{{ CompatNo() }}</td>
</tr>
</tbody>
</table>
</div>
<p>[1] IE9 支持一个规范的一个旧版本的草稿, 这里的值的类型是 <code>long</code> 而不是一个 <code>double</code> 类型的值.</p>
<h2 class="note" id="另见">另见</h2>
<ul>
<li>{{ event("wheel") }}</li>
<li>{{domxref("WheelEvent")}}</li>
</ul>
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