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---
title: <shadow>
slug: Web/HTML/Element/shadow
translation_of: Web/HTML/Element/shadow
original_slug: Web/HTML/Elemento/Shadow
---
<p>{{obsolete_header}}</p>
<p><span class="seoSummary">El <strong>HTML <code><shadow></code> element</strong>—es una parte absoluta de la suite tecnológica de <a href="/en-US/docs/Web/Web_Components">Web Components</a> —estaba destinado a ser utilizado como un shadow DOM {{glossary("insertion point")}}. Es posible que lo hayas usado si has creado varias root shadow bajo un shadow host. No es útil en HTML ordinario.</span></p>
<table class="properties">
<tbody>
<tr>
<th scope="row"><a href="/en-US/docs/Web/HTML/Content_categories">Content categories</a></th>
<td><a href="/en-US/docs/Web/HTML/Content_categories#Transparent_content_model">Transparent content</a>.</td>
</tr>
<tr>
<th scope="row">Permitted content</th>
<td><a href="/en-US/docs/Web/HTML/Content_categories#Flow_content">Flow content</a>.</td>
</tr>
<tr>
<th scope="row">Tag omission</th>
<td>{{no_tag_omission}}</td>
</tr>
<tr>
<th scope="row">Permitted parents</th>
<td>Any element that accepts flow content.</td>
</tr>
<tr>
<th scope="row">Permitted ARIA roles</th>
<td>None</td>
</tr>
<tr>
<th scope="row">DOM interface</th>
<td>{{domxref("HTMLShadowElement")}}</td>
</tr>
</tbody>
</table>
<h2 id="Attributes">Attributes</h2>
<p>This element includes the <a href="/en-US/docs/Web/HTML/Global_attributes">global attributes</a>.</p>
<h2 id="Example">Example</h2>
<p>Aquí está un ejemplo simple usando el <code><shadow></code> element. Es un archivo HTML con todo lo necesario en él.</p>
<div class="note">
<p><strong>Note:</strong> This is an experimental technology. For this code to work, the browser you display it in must support Web Components. See <a href="/en-US/docs/Web/Web_Components#Enabling_Web_Components_in_Firefox">Enabling Web Components in Firefox</a>.</p>
</div>
<pre class="brush: html"><html>
<head></head>
<body>
<!-- This <div> will hold the shadow roots. -->
<div>
<!-- This heading will not be displayed -->
<h4>My Original Heading</h4>
</div>
<script>
// Get the <div> above with its content
var origContent = document.querySelector('div');
// Create the first shadow root
var shadowroot1 = origContent.createShadowRoot();
// Create the second shadow root
var shadowroot2 = origContent.createShadowRoot();
// Insert something into the older shadow root
shadowroot1.innerHTML =
'<p>Older shadow root inserted by
&lt;shadow&gt;</p>';
// Insert into younger shadow root, including <shadow>.
// The previous markup will not be displayed unless
// <shadow> is used below.
shadowroot2.innerHTML =
'<shadow></shadow> <p>Younger shadow
root, displayed because it is the youngest.</p>';
</script>
</body>
</html>
</pre>
<p>If you display this in a web browser it should look like the following.</p>
<p><img alt="shadow example" src="https://mdn.mozillademos.org/files/10083/shadow-example.png" style="height: 343px; width: 641px;"></p>
<h2 id="Specifications">Specifications</h2>
<p>This element is no longer defined by any specifications.</p>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<p>{{CompatibilityTable}}</p>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari (WebKit)</th>
</tr>
<tr>
<td>Basic support</td>
<td>35</td>
<td>{{CompatGeckoDesktop("28")}}<sup>[1]</sup></td>
<td>{{CompatNo}}</td>
<td>26</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Phone</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>37</td>
<td>{{CompatGeckoMobile("28")}}<sup>[1]</sup></td>
<td>{{CompatNo}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<p>[1] If Shadow DOM is not enabled in Firefox, <code><shadow></code> elements will behave like {{domxref("HTMLUnknownElement")}}. Shadow DOM was first implemented in Firefox 33 and is behind a preference, <code>dom.webcomponents.enabled</code>, which is disabled by default.</p>
<h2 id="See_also">See also</h2>
<ul>
<li><a href="/en-US/docs/Web/Web_Components">Web Components</a></li>
<li>{{HTMLElement("content")}}, {{HTMLElement("slot")}}, {{HTMLElement("template")}}, {{HTMLElement("element")}}</li>
</ul>
<div>{{HTMLRef}}</div>
|
