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---
title: DeviceMotionEvent.rotationRate
slug: Web/API/DeviceMotionEvent/rotationRate
tags:
- API
- DOM
- Firefox OS
- 传感器
- 运动传感器
- 需要示例
translation_of: Web/API/DeviceMotionEvent/rotationRate
---
<p>{{ ApiRef("Device Orientation Events") }}</p>
<p><span class="short_text" id="result_box" lang="zh-CN"><span>返回设备围绕其每个轴（x、y、z）旋转的速率（单位：度/秒）。</span></span></p>
<div class="note"><strong>注意</strong>: 如果设备无法提供此信息，则为null</div>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">var rates = <em>instanceOfDeviceMotionEvent</em>.rotationRate;
</pre>
<h2 id="值">值</h2>
<p><span class="short_text" id="result_box" lang="zh-CN"><span>rotationRates属性是一个只读对象，用于描述设备围绕其每个轴的旋转速率：</span></span></p>
<dl>
<dt><code>alpha</code></dt>
<dd><span id="result_box" lang="zh-CN"><span>设备绕其Z轴旋转的速率（</span><span>即绕垂直于屏幕的线旋转）</span></span></dd>
<dt><code>beta</code></dt>
<dd><span class="short_text" id="result_box" lang="zh-CN"><span>设备绕其X轴旋转的速率（</span><span>即从前到后旋转）</span></span></dd>
<dt><code>gamma</code></dt>
<dd><span class="short_text" id="result_box" lang="zh-CN"><span>设备绕其Y轴旋转的速率（</span><span>即从一侧到另一侧）</span></span></dd>
</dl>
<h2 id="说明">说明</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName('Device Orientation')}}</td>
<td>{{Spec2('Device Orientation')}}</td>
<td>Initial specification.</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>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatGeckoDesktop("6")}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</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 Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatGeckoMobile("6")}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>4.2</td>
</tr>
</tbody>
</table>
</div>
<h2 id="推荐阅读">推荐阅读</h2>
<ul>
<li>{{ domxref("DeviceMotionEvent") }}</li>
<li>{{ event("devicemotion") }}</li>
<li>{{ domxref("window.ondevicemotion") }}</li>
<li>{{ event("deviceorientation") }}</li>
<li>{{ domxref("DeviceOrientationEvent") }}</li>
<li><a href="/en-US/docs/WebAPI/Detecting_device_orientation" title="/en-US/docs/WebAPI/Detecting_device_orientation">Detecting device orientation</a></li>
<li><a href="https://developer.mozilla.org/en/DOM/Orientation_and_motion_data_explained" title="Orientation and motion data explained">Orientation and motion data explained</a></li>
</ul>
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