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---
title: ':fullscreen'
slug: 'Web/CSS/:fullscreen'
translation_of: 'Web/CSS/:fullscreen'
---
<div>{{CSSRef}}</div>
<p><span class="seoSummary">A pseudo-classe <strong><code>:fullscreen</code></strong> do CSS representa os elementos que estão atualmente no modo tela-cheia. Se vários elementos estiverem em tela-cheia, isto seleciona todos.</span></p>
<h2 id="Sintaxe">Sintaxe</h2>
{{csssyntax}}
<h2 id="Usage_notes">Usage notes</h2>
<p>The <code>:fullscreen</code> pseudo-class lets you configure your stylesheets to automatically adjust the size, style, or layout of content when elements switch back and forth between full-screen and traditional presentations.</p>
<h2 id="Examples">Examples</h2>
<p>In this example, the color of a button is changed depending on whether or not the document is in full-screen mode. This is done without needing to specifically apply style changes using JavaScript.</p>
<h3 id="HTML">HTML</h3>
<p>The page's HTML looks like this:</p>
<pre class="brush: html notranslate"><h1>MDN Web Docs Demo: :fullscreen pseudo-class</h1>
<p>This demo uses the <code>:fullscreen</code> pseudo-class to automatically
change the style of a button used to toggle full-screen mode on and off,
entirely using CSS.</p>
<button id="fs-toggle">Toggle Fullscreen</button></pre>
<p>The {{HTMLElement("button")}} with the ID <code>"fs-toggle"</code> will change between pale red and pale green depending on whether or not the document is in full-screen mode.</p>
<h3 id="CSS">CSS</h3>
<p>The magic happens in the CSS. There are two rules here. The first establishes the background color of the "Toggle Full-screen Mode" button when the element is not in a full-screen state. The key is the use of the <code>:not(:fullscreen)</code>, which looks for the element to not have the <code>:fullscreen</code> pseudo-class applied to it.</p>
<pre class="brush: css notranslate">#fs-toggle:not(:fullscreen) {
background-color: #afa;
}
</pre>
<p>When the document <em>is</em> in full-screen mode, the following CSS applies instead, setting the background color to a pale shade of red.</p>
<pre class="brush: css notranslate">#fs-toggle:fullscreen {
background-color: #faa;
}</pre>
<h2 id="Specifications">Specifications</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('Fullscreen', '#:fullscreen-pseudo-class', ':fullscreen')}}</td>
<td>{{Spec2('Fullscreen')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<div>
<p>{{Compat("css.selectors.fullscreen")}}</p>
</div>
<h2 id="See_also">See also</h2>
<ul>
<li><a href="/en-US/docs/Web/API/Fullscreen_API">Fullscreen API </a></li>
<li><a href="/en-US/docs/Web/API/Fullscreen_API/Guide">Guide to the Fullscreen API</a></li>
<li>{{cssxref(":not")}}</li>
<li>{{cssxref("::backdrop")}}</li>
<li>DOM API: {{ domxref("Element.requestFullscreen()") }}, {{ domxref("Document.exitFullscreen()") }}, {{ domxref("Document.fullscreenElement") }}</li>
<li>{{HTMLAttrXRef("allowfullscreen", "iframe")}} attribute</li>
</ul>
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