The HTML <aside> element represents a portion of a document whose content is only indirectly related to the document's main content. Asides are frequently presented as sidebars or call-out boxes.

Content categories Flow content, sectioning content, palpable content.
Permitted content Flow content.
Tag omission None, both the starting and ending tag are mandatory.
Permitted parents Any element that accepts flow content. Note that an <aside> element must not be a descendant of an <address> element.
Permitted ARIA roles feed, note, presentation, region, search
DOM interface HTMLElement

Attributes

This element only includes the global attributes.

Usage notes

  • Do not use the <aside> element to tag parenthesized text, as this kind of text is considered part of the main flow.

Examples

<article>
  <p>
    The Disney movie <cite>The Little Mermaid</cite> was
    first released to theatres in 1989.
  </p>
  <aside>
    <p>
      The movie earned $87 million during its initial release.
    </p>
  </aside>
  <p>
    More info about the movie...
  </p>
</article>

Specifications

Specification Status Comment
HTML Living Standard
The definition of '<aside>' in that specification.
Living Standard  
HTML5
The definition of '<aside>' in that specification.
Recommendation  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support5 Yes4911.14.1
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support Yes Yes Yes49114.2

See also