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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: Screen.pixelDepth
+slug: Web/API/Screen/pixelDepth
+tags:
+ - DOM
+ - DOM_0
+ - Gecko
+ - Gecko DOM Reference
+ - screen
+translation_of: Web/API/Screen/pixelDepth
+---
+<p>{{APIRef("CSSOM")}}</p>
+
+<p>画面のビット深度を返します。CSSOM により、互換性の理由から <code>24</code> を返す実装もあります。そうでないものについては、{{anch("Browser compatibility", "ブラウザーの互換性")}}の節を参照してください。</p>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox notranslate">let <var>depth</var> = window.screen.pixelDepth</pre>
+
+<h2 id="Example" name="Example">例</h2>
+
+<pre class="brush: js; notranslate">// if there is not adequate bit depth
+// choose a simpler color
+if ( window.screen.pixelDepth &gt; 8 ) {
+ document.style.color = "#FAEBD7";
+} else {
+ document.style.color = "#FFFFFF";
+}
+</pre>
+
+<h2 id="Specifications" name="Specifications">仕様書</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">仕様書</th>
+ <th scope="col">状態</th>
+ <th scope="col">備考</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{SpecName('CSSOM View', '#dom-screen-pixeldepth', 'Screen.pixelDepth')}}</td>
+ <td>{{Spec2('CSSOM View')}}</td>
+ <td>初回定義</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">ブラウザーの互換性</h2>
+
+<div class="hidden">このページの互換性一覧表は構造化データから生成されています。データに協力していただけるのであれば、 <a class="external" href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> をチェックアウトしてプルリクエストを送信してください。</div>
+
+<p>{{Compat("api.Screen.pixelDepth")}}</p>
+
+<h2 id="See_also" name="See_also">関連情報</h2>
+
+<ul>
+ <li>{{DOMxRef("Screen.colorDepth")}}</li>
+</ul>