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+---
+title: ':fullscreen'
+slug: 'Web/CSS/:fullscreen'
+tags:
+  - CSS
+  - CSS Pseudo-class
+  - Experimental
+  - Full-screen
+  - Reference
+translation_of: 'Web/CSS/:fullscreen'
+---
+<div>{{CSSRef}}{{SeeCompatTable}}</div>
+
+<h2 id="总结">总结</h2>
+
+<p><code><font face="Open Sans, Arial, sans-serif">css伪类</font>:fullscreen应用于当前处于全屏显示模式的元素。</code> 它不仅仅选择顶级元素，还包括所有已显示的栈内元素。</p>
+
+<div class="note">W3C标准使用不带破折号的单词:fullscreen，但Webkit和Gecko应用接口各自使用前缀带有破折号的变量：<code>:-webkit-full-screen</code> 和<code>:-moz-full-screen。</code>微软的Edge和Internet Explorer各自使用标准语法：<code>:fullscreen</code>和<code>:-ms-fullscreen。</code></div>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">{{csssyntax}}</pre>
+
+<h2 id="例子">例子</h2>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;div id="fullscreen"&gt;
+  &lt;h1&gt;:fullscreen Demo&lt;/h1&gt;
+  &lt;p&gt; This will become a big red text when on fullscreen.&lt;/p&gt;
+  &lt;button id="fullscreen-button"&gt;Enter Fullscreen&lt;/button&gt;
+&lt;/div&gt;
+</pre>
+
+<div class="hidden">
+<h3 id="Javascript">Javascript</h3>
+
+<pre class="brush: js">var fullscreenButton = document.getElementById("fullscreen-button");
+var fullscreenDiv    = document.getElementById("fullscreen");
+var fullscreenFunc   = fullscreenDiv.requestFullscreen;
+if (!fullscreenFunc) {
+  ['mozRequestFullScreen',
+   'msRequestFullscreen',
+   'webkitRequestFullScreen'].forEach(function (req) {
+     fullscreenFunc = fullscreenFunc || fullscreenDiv[req];
+   });
+}
+function enterFullscreen() {
+  fullscreenFunc.call(fullscreenDiv);
+}
+fullscreenButton.addEventListener('click', enterFullscreen);
+</pre>
+
+<h3 id="Browser-Specific_CSS">Browser-Specific CSS</h3>
+
+<pre class="brush: css">#fullscreen:-moz-full-screen {
+  padding: 42px;
+  background-color: pink;
+  border:2px solid #f00;
+  font-size: 200%;
+}
+#fullscreen:-ms-fullscreen {
+  padding: 42px;
+  background-color: pink;
+  border:2px solid #f00;
+  font-size: 200%;
+}
+#fullscreen:-webkit-full-screen {
+  padding: 42px;
+  background-color: pink;
+  border:2px solid #f00;
+  font-size: 200%;
+}
+
+#fullscreen:-moz-full-screen &gt; h1 {
+  color: red;
+}
+#fullscreen:-ms-fullscreen &gt; h1 {
+  color: red;
+}
+#fullscreen:-webkit-full-screen &gt; h1 {
+  color: red;
+}
+
+#fullscreen:-moz-full-screen &gt; p {
+  color: DarkRed;
+}
+#fullscreen:-ms-fullscreen &gt; p {
+  color: DarkRed;
+}
+#fullscreen:-webkit-full-screen &gt; p {
+  color: DarkRed;
+}
+
+#fullscreen:-moz-full-screen &gt; button {
+  display: none;
+}
+#fullscreen:-ms-fullscreen &gt; button {
+  display: none;
+}
+#fullscreen:-webkit-full-screen &gt; button {
+  display: none;
+}
+</pre>
+</div>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css">#fullscreen:fullscreen {
+  padding: 42px;
+  background-color: pink;
+  border:2px solid #f00;
+  font-size: 200%;
+}
+
+#fullscreen:fullscreen &gt; h1 {
+  color: red;
+}
+
+#fullscreen:fullscreen &gt; p {
+  color: DarkRed;
+}
+
+#fullscreen:fullscreen &gt; button {
+  display: none;
+}
+</pre>
+
+<h3 id="结果">结果</h3>
+
+<p>{{ LiveSampleLink('Example', "(If the 'Enter Fullscreen' button doesn't work, try here)") }}</p>
+
+<p>{{ EmbedLiveSample('Example','80%','200px') }}</p>
+
+<h2 id="特点">特点</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">特点</th>
+   <th scope="col">情况</th>
+   <th scope="col">评论</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('Fullscreen', '#:fullscreen-pseudo-class', ':fullscreen')}}</td>
+   <td>{{Spec2('Fullscreen')}}</td>
+   <td>Initial definition</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>特性</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>
+    <p>基本支持</p>
+   </td>
+   <td>15.0 {{property_prefix("-webkit")}}<sup>[1]</sup></td>
+   <td>12</td>
+   <td>{{CompatGeckoDesktop("9.0")}}{{property_prefix("-moz")}}<sup>[1]</sup><br>
+    {{CompatGeckoDesktop("47.0")}}<sup>[2]</sup></td>
+   <td>11 {{property_prefix("-ms")}}<sup>[3]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>6.0 {{property_prefix("-webkit")}}<sup>[1]</sup></td>
+  </tr>
+  <tr>
+   <td>全屏下选取所有元素</td>
+   <td>{{CompatUnknown}}</td>
+   <td>12</td>
+   <td>{{CompatGeckoDesktop(43)}}</td>
+   <td>11</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>特性</th>
+   <th>Android</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>基本支持</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatGeckoMobile("9.0")}}<br>
+    {{CompatGeckoDesktop("47.0")}}<sup>[2]</sup></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+  <tr>
+   <td>全屏下选取所有元素</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatGeckoMobile("43")}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<p>[1] Webkit和Gecko前缀版本在<em>full</em>和<em>screen</em>之间带有破折号, 但W3C标准使用一个单词：<code>:fullscreen</code>, <code>:-webkit-full-screen</code>, <code>:-moz-full-screen</code>.</p>
+
+<p>[2] Gecko 47.0 {{geckoRelease("47.0")}} 通过参数<code>full-screen-api.unprefix.enabled使用</code>不带前缀的伪类, 默认为false.</p>
+
+<p>[3] Internet Explorer使用前缀<code>-ms，但在</code><em>full</em>和<em>screen</em>之间没有破折号<code>:-ms-fullscreen</code>.</p>
+
+<h2 id="再看看">再看看</h2>
+
+<ul>
+ <li>{{cssxref("::backdrop")}}</li>
+ <li><a href="/en-US/docs/Web/API/Fullscreen_API">Using full-screen mode</a></li>
+ <li>{{ domxref("Element.requestFullscreen()") }}</li>
+ <li>{{ domxref("Document.exitFullscreen()") }}</li>
+ <li>{{ domxref("Document.fullscreen") }}</li>
+ <li>{{ domxref("Document.fullscreenElement") }}</li>
+ <li>{{HTMLAttrXRef("allowfullscreen", "iframe")}}</li>
+ <li>{{cssxref(":-moz-full-screen-ancestor")}}</li>
+</ul>