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HTML: <aside> tag

This HTML tutorial explains how to use the HTML element called the <aside> tag with syntax and examples.

Description

The HTML <aside> tag is an HTML5 element that defines a section that is tangentially related to the content around it in the HTML document. This tag is also commonly referred to as the <aside> element.

Syntax

In HTML, the syntax for the <aside> tag is:

<body>
<aside>
  <p>Text that appears under aside</p>
</aside>
</body>

Attributes

Only the Global Attributes apply to the <aside> tag. There are no attributes that are specific to the <aside> tag.

Note

  • The HTML <aside> element is an HTML5 element that is found within the <body> tag.
  • The <aside> tag can be used for any of the following: advertisement, glossary definition, biography of the author, profile information, or related links.
  • For IE browsers older than IE 9, use HTML5shiv which is a javascript workaround to provide support for the new HTML5 elements such as: <header>, <main>, <article>, <section>, <aside>, <nav>, <footer>.

Browser Compatibility

The <aside> tag has basic support with the following browsers:

  • Chrome 5+
  • Android 2.2+
  • Firefox 4.0+ (Gecko 2.0+)
  • Firefox Mobile 4.0+ (Gecko 2.0+)
  • Internet Explorer 9.0+ (IE 9.0+)
  • IE Phone 9.0+
  • Opera 11.10+
  • Opera Mobile 11.0+
  • Safari 4.1+ (WebKit)
  • Safari Mobile 5.0+ (iOs 4.2+)

Example

We will discuss the <aside> tag below, exploring examples of how to use the <aside> tag in HTML5, HTML 4.01 Transitional, XHTML 1.0 Transitional, XHTML 1.0 Strict, and XHTML 1.1.

  • HTML5
  • HTML4
  • XHTML

HTML5 Document

If you created a new web page in HTML5, your <aside> tag might look like this:

<!doctype html>
<html>

<head>
<meta charset="UTF-8">
<title>HTML5 Example by www.techonthenet.com</title>
</head>

<body>
<article>
  <h1>Heading for Article</h1>
  <p>Text that appears under article</p>
</article>
<aside>
  <p>Text that appears under aside</p>
</aside>
</body>

</html>

In this HTML5 Document example, we have created an <article> tag and following that an <aside> tag.

HTML 4.01 Transitional Document

You can not use the <aside> tag in HTML 4.01 Transitional.

XHTML 1.0 Transitional Document

You can not use the <aside> tag in XHTML 1.0 Transitional.

XHTML 1.0 Strict Document

You can not use the <aside> tag in XHTML 1.0 Strict.

XHTML 1.1 Document

You can not use the <aside> tag in XHTML 1.1.

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