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---
title: document.mozFullScreenEnabled
slug: Web/API/Document/fullscreenEnabled
translation_of: Web/API/Document/fullscreenEnabled
original_slug: Web/API/Document/mozFullScreenEnabled
---
<p>{{ ApiRef() }}</p>
<h3 id="Summary" name="Summary">概述</h3>
<p>返回一个布尔值,表明浏览器是否支持全屏模式. 全屏模式只在那些不包含窗口化的插件的页面中可用.对于一个{{ HTMLElement("iframe") }}元素中的页面,则它必需拥有{{ HTMLAttrXRef("mozallowfullscreen", "iframe") }}属性.</p>
<h3 id="Syntax" name="Syntax">语法</h3>
<pre class="eval"><em>var isFullScreenAvailable</em> = <em>document</em>.mozFullScreenEnabled;
</pre>
<p>如果当前文档可以进入全屏模式,则<code>isFullScreenAvailable</code>为<code>true</code></p>
<h3 id="Example" name="Example">例子</h3>
<pre class="eval">function requestFullScreen() {
if (document.mozFullScreenEnabled) {
videoElement.requestFullScreen();
} else {
console.log('你的浏览器不支持全屏模式!');
}
}
</pre>
<h3 id="备注">备注</h3>
<p>进入页面<a href="/zh-cn/DOM/Using_full-screen_mode" title="zh-cn/DOM/Using full-screen mode">使用全屏模式</a>查看详情和示例.</p>
<h3 id="Specification" name="Specification">浏览器兼容性</h3>
{{Compat("api.Document.fullscreenEnabled")}}
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