W3cubDocs

<content>

Deprecated
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. 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 <content>—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 It has now been replaced by the 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

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	35	No	33¹	No	26	No

Feature	Android webview	Chrome for Android	Edge mobile	Firefox for Android	IE mobile	Opera Android	iOS Safari
Basic support	37	37	No	33¹	No	?	No

1. From version 33: this feature is behind the dom.webcomponents.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

<content>

Attributes

Example

Specifications

Browser compatibility

See also