<shadow>

Obsoleto

Esta funcionalidad es obsoleta. Aunque puede aún funcionar en algunos navegadores, se desalienta su uso ya que puede ser removida en cualquier momento. Evite usarla.

El HTML <shadow> element—es una parte absoluta de la suite tecnológica de Web Components —estaba destinado a ser utilizado como un shadow DOM insertion point. Es posible que lo hayas usado si has creado varias root shadow bajo un shadow host. No es útil en HTML ordinario.

Content categories Transparent content.
Permitted content Flow content.
Tag omission None, both the starting and ending tag are mandatory.
Permitted parents Any element that accepts flow content.
Permitted ARIA roles None
DOM interface HTMLShadowElement

Attributes

This element includes the global attributes.

Example

Aquí está un ejemplo simple usando el  <shadow> element. Es un archivo HTML con todo lo necesario en él.

Note: This is an experimental technology. For this code to work, the browser you display it in must support Web Components. See Enabling Web Components in Firefox.

<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>

If you display this in a web browser it should look like the following.

shadow example

Specifications

This element is no longer defined by any specifications.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 35 28 (28)[1] Sin soporte 26 Sin soporte
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 37 28.0 (28)[1] Sin soporte ? ?

[1] If Shadow DOM is not enabled in Firefox, <shadow> elements will behave like HTMLUnknownElement. Shadow DOM was first implemented in Firefox 33 and is behind a preference, dom.webcomponents.enabled, which is disabled by default.

See also