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+---
+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>