W3cubDocs

<aside>

The <aside> 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 compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	5	Yes	4	9	11.1	4.1