<content>: The Shadow DOM Content Placeholder element (obsolete)

Deprecated
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The HTML <content> element—an obsolete part of the Web Components suite of technologies—was used inside of Shadow DOM as an insertion point, and wasn't meant to be used in ordinary HTML. It has now been replaced by the <slot> element, which creates a point in the DOM at which a shadow DOM can be inserted.

Note: Though present in early draft of the specifications and implemented in several browsers, this element has been removed in later versions of the spec, and should not be used. It is documented here to assist in adapting code written during the time it was included in the spec to work with newer versions of the specification.

Content categories Transparent content.
Permitted content Flow content.
Tag omission None, both the starting and ending tag are mandatory.
Permitted parent elements Any element that accepts flow content.
DOM interface HTMLContentElement

Attributes

This element includes the global attributes.

select
A comma-separated list of selectors. These have the same syntax as CSS selectors. They select the content to insert in place of the <content> element.

Example

Here is a simple example of using the <content> element. It is an HTML file with everything needed in it.

Note: 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>
  <!-- The original content accessed by <content> -->
  <div>
    <h4>My Content Heading</h4>
    <p>My content text</p>
  </div>

  <script>
  // Get the <div> above.
  var myContent = document.querySelector('div');
  // Create a shadow DOM on the <div>
  var shadowroot = myContent.createShadowRoot();
  // Insert into the shadow DOM a new heading and 
  // part of the original content: the <p> tag.
  shadowroot.innerHTML =
   '<h2>Inserted Heading</h2> <content select="p"></content>';
  </script>

  </body>
</html>

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

content example

Specifications

This element is no longer defined by any specifications.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
DeprecatedNon-standard
Chrome Full support 35Edge No support NoFirefox No support 33 — 59
Disabled
No support 33 — 59
Disabled
Disabled From version 33 until version 59 (exclusive): this feature is behind the dom.webcomponents.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support 26Safari No support NoWebView Android Full support 37Chrome Android Full support 37Edge Mobile No support NoFirefox Android No support 33 — 59
Disabled
No support 33 — 59
Disabled
Disabled From version 33 until version 59 (exclusive): this feature is behind the dom.webcomponents.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
Opera Android ? Safari iOS No support NoSamsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.
User must explicitly enable this feature.
User must explicitly enable this feature.

See also

Document Tags and Contributors

Last updated by: Sheppy,