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+---
+title: Screen
+slug: Web/API/Screen
+translation_of: Web/API/Screen
+---
+<div>{{APIRef("CSSOM View")}}</div>
+
+<p><code>Screen</code> 介面表示了一個用戶端螢幕,通常是指呈現目前頁面的視窗。</p>
+
+<p>一般來說為顯示目前網頁的視窗,可以透過 <code>window.screen</code> 取得物件實體。</p>
+
+<h2 id="Example" name="Example">屬性</h2>
+
+<dl>
+ <dt>{{domxref("Screen.availTop")}}</dt>
+ <dd>Specifies the y-coordinate of the first pixel that is not allocated to permanent or semipermanent user interface features.</dd>
+ <dt>{{domxref("Screen.availLeft")}}</dt>
+ <dd>Returns the first available pixel available from the left side of the screen.</dd>
+ <dt>{{domxref("Screen.availHeight")}}</dt>
+ <dd>Specifies the height of the screen, in pixels, minus permanent or semipermanent user interface features displayed by the operating system, such as the Taskbar on Windows.</dd>
+ <dt>{{domxref("Screen.availWidth")}}</dt>
+ <dd>Returns the amount of horizontal space in pixels available to the window.</dd>
+ <dt>{{domxref("Screen.colorDepth")}}</dt>
+ <dd>Returns the color depth of the screen.</dd>
+ <dt>{{domxref("Screen.height")}}</dt>
+ <dd>Returns the height of the screen in pixels.</dd>
+ <dt>{{domxref("Screen.left")}}</dt>
+ <dd>Returns the distance in pixels from the left side of the main screen to the left side of the current screen.</dd>
+ <dt>{{domxref("Screen.orientation")}}</dt>
+ <dd>Returns the current orientation of the screen.</dd>
+ <dt>{{domxref("Screen.pixelDepth")}}</dt>
+ <dd>Gets the bit depth of the screen.</dd>
+ <dt>{{domxref("Screen.top")}}</dt>
+ <dd>Returns the distance in pixels from the top side of the current screen.</dd>
+ <dt>{{domxref("Screen.width")}}</dt>
+ <dd>Returns the width of the screen.</dd>
+ <dt>{{domxref("Screen.mozEnabled")}} {{gecko_minversion_inline("12.0")}}</dt>
+ <dd>Boolean. Setting to false will turn off the device's screen.</dd>
+ <dt>{{domxref("Screen.mozBrightness")}} {{gecko_minversion_inline("12.0")}}</dt>
+ <dd>Controls the brightness of a device's screen. A double between 0 and 1.0 is expected.</dd>
+</dl>
+
+<h3 id="事件處理器">事件處理器</h3>
+
+<dl>
+ <dt>{{domxref("Screen.onorientationchange")}}</dt>
+ <dd>A handler for the {{event("orientationchange")}} events.</dd>
+</dl>
+
+<h2 id="方法">方法</h2>
+
+<dl>
+ <dt>{{domxref("Screen.lockOrientation")}}</dt>
+ <dd>Lock the screen orientation (only works in fullscreen or for installed apps)</dd>
+ <dt>{{domxref("Screen.unlockOrientation")}}</dt>
+ <dd>Unlock the screen orientation (only works in fullscreen or for installed apps)</dd>
+</dl>
+
+<p>Methods inherit from {{domxref("EventTarget")}}</p>
+
+<p>{{page("/en-US/docs/Web/API/EventTarget","Methods")}}</p>
+
+<h2 id="Example" name="Example">範例</h2>
+
+<pre class="brush:js">if (screen.pixelDepth &lt; 8) {
+ // use low-color version of page
+} else {
+ // use regular, colorful page
+}
+</pre>
+
+<h2 id="Specification" name="Specification">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('CSSOM View', '#the-screen-interface', 'Screen') }}</td>
+ <td>{{ Spec2('CSSOM View') }}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>