From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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 .../api/deviceorientationevent/alpha/index.html    | 53 ++++++++++++++++++++++
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+---
+title: DeviceOrientationEvent.alpha
+slug: Web/API/DeviceOrientationEvent/alpha
+tags:
+  - API
+  - 陀螺仪
+translation_of: Web/API/DeviceOrientationEvent/alpha
+---
+<p>{{ ApiRef("Device Orientation Events") }}</p>
+
+<p>返回设备旋转时Z轴的值；即：设备围绕屏幕中心扭转的角度。  详细信息请查看<a href="/en/DOM/Orientation_and_motion_data_explained" title="Orientation and motion data explained">方向和运动数据</a>。</p>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox">var alpha = <em>instanceOfDeviceOrientationEvent</em>.alpha;
+</pre>
+
+<h2 id="Specifications">Specifications</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="Browser_compatibility">Browser compatibility</h2>
+
+<p> </p>
+
+<p>{{Compat("api.DeviceOrientationEvent.alpha")}}</p>
+
+<p> </p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>{{ domxref("DeviceOrientationEvent") }}</li>
+ <li><a href="/en/Detecting_device_orientation" title="Detecting device orientation">Detecting device orientation</a></li>
+ <li><a href="/en/DOM/Orientation_and_motion_data_explained" title="Orientation and motion data explained">Orientation and motion data explained</a></li>
+ <li>{{ domxref("window.ondeviceorientation") }}</li>
+ <li>{{ event("deviceorientation") }}</li>
+</ul>
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