---
title: Screen.orientation
slug: Web/API/Screen/orientation
translation_of: Web/API/Screen/orientation
---
<div>{{APIRef("CSSOM View")}}{{SeeCompatTable}}</div>

<p><code>Screen.orientation</code> 屬性可以取得螢幕目前的方向。</p>

<h2 id="語法">語法</h2>

<pre class="syntaxbox">var orientation = window.screen.orientation.type;
</pre>

<h2 id="回傳值">回傳值</h2>

<p>回傳值為一個代表螢幕方向的字串，可能是 <code>portrait-primary</code>、<code>portrait-secondary</code>、<code>landscape-primary</code> 或 <code>landscape-secondary</code>（請參考 {{domxref("window.screen.lockOrientation","lockOrientation")}} 以瞭解更多資訊）。</p>

<h2 id="範例">範例</h2>

<pre class="brush: js">var orientation = screen.orientation || screen.mozOrientation || screen.msOrientation;

if (orientation.type === "landscape-primary") {
  console.log("That looks good.");
} else if (orientation.type === "landscape-secondary") {
  console.log("Mmmh... the screen is upside down!");
} else if (orientation.type === "portrait-secondary" || orientation.type === "portrait-primary") {
  console.log("Mmmh... you should rotate your device to landscape");
}
</pre>

<h2 id="規範">規範</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('Screen Orientation', '', 'Screen Orientation')}}</td>
   <td>{{Spec2('Screen Orientation')}}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="瀏覽器相容性">瀏覽器相容性</h2>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>38</td>
   <td>{{CompatVersionUnknown}} {{property_prefix("moz")}}<sup>[1]</sup></td>
   <td>11{{property_prefix("ms")}}<sup>[2]</sup></td>
   <td>25</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>Chrome for Android</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>{{CompatNo}}</td>
   <td>39</td>
   <td>{{CompatVersionUnknown}} {{property_prefix("moz")}}<sup>[1]</sup></td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] This API is only implemented as a prefixed method (<code>mozOrientation</code>) in B2G and Firefox for Android.</p>

<p>[2] This API is implemented using a prefix (<code>msOrientation</code>) in Internet Explorer for Windows 8.1 and Windows RT 8.1. It is not supported on Windows 7.</p>

<h2 id="參見">參見</h2>

<ul>
 <li>{{domxref("Screen.orientation")}}</li>
 <li>{{domxref("Screen.unlockOrientation()")}}</li>
 <li>{{domxref("Screen.onorientationchange")}}</li>
 <li><a href="/zh-TW/docs/Web/API/CSS_Object_Model/Managing_screen_orientation">控制畫面方向</a></li>
</ul>