HTML <aside> Tag Definition, Usage and Examples

The <aside> HTML Tag indicates a section of a document whose content is only slightly related to the document’s primary content. Commonly, asides are presented as sidebars or call-out boxes. The <aside> HTML Tag is used to describe the web page’s primary object in a concise manner, similar to a highlighter. The <aside> HTML Tag is part of the style and semantic tags category in HTML Element Reference. The attributes of the <aside> HTML Tag are global attributes and event attributes. 

<aside> code block example to learn how it works is given below. 

<aside>
          Content
</aside>

The second example usage of the “<aside>” code block example is below. 

<h1>Chrome</h1>
<p>Google Chrome is a Google-developed cross-platform web browser.</p>
<aside>
<p>It was released for Microsoft Windows for the first time in 2008, using free software parts from Apple WebKit and Mozilla Firefox.</p>
</aside>

What is <aside> HTML Tag?

The <aside> HTML Tag is used to briefly describe the web page’s primary object, much like a highlighter. It is necessary for web developers because it essentially identifies content that is related to the web page’s primary content but does not constitute the primary page’s primary intent. The <aside> HTML Tag primarily contains author information, links, and related content.

How to Use <aside> HTML Tag?

To use <aside> HTML Tag, the web developer should write <aside></aside> with content inserted between the start and end tags and it will describe the web page’s primary object just like a highlighter. Avoid tagging parenthesized text with the <aside> HTML Tag, as this type of text, is considered to be part of the main flow.

Example Usage of <aside> HTML Tag?

The following example of usage of <aside> HTML Tag is given below.

<article>
  <p>
    Meta Platforms <cite>Facebook</cite> was
    founded in 2004
  </p>
  <aside>
    <p>
     It was the most downloaded mobile application of the decade of the 2010s.
    </p>
  </aside>
  <p>
    According to Facebook, there are 2.8 billion monthly active users as of 2020.
  </p>
</article>

What are the Attributes of <aside> HTML Tag?

There are multiple attributes for the <aside> HTML Tag. The following attributes are listed below.

  • Global Attributes: The <aside> HTML Tag supports Global Attributes. All HTML elements, even those not specified in the standard, can have global attributes. This means that any non-standard elements must nevertheless allow certain characteristics, even if using such elements makes the content non-HTML5 compliant.
  • Event Attributes: The <aside> HTML Tag supports Event Attributes. The Event Attributes always have a name that begins with “on” and is followed by the name of the event for which it is intended. They specify a script to run when an event of the defined type is dispatched to the element with the specified attributes.

What are the Default CSS Settings for <aside> HTML Tag?

The following is the Default CSS Setting for the <aside> HTML Tag.

aside {
    width: 75%;
    padding-left: .3rem;
    margin-left: .3rem;
    float: right;
    box-shadow: inset 5px 0 5px -5px #00000;
    font-style: bold;
    color: #FFE4C4;
}
aside > p {
    margin: 1rem;
}

What are the Related other HTML Tags to <aside>?

The other related HTML Tags to <aside> HTML Tag are listed below.

  • <footer> HTML Tag: The <footer> HTML Tag is related to <aside> HTML Tag because they are both style and semantic tags. The <footer> HTML Tag specifies a footer for the sectioning content or sectioning root element immediately preceding it.
  • <div> HTML Tag: The <div> HTML Tag is related to <aside> HTML Tag because they are both style and semantic tags. The <div> HTML Tag acts as a container for flow content. It has no influence on the text or layout unless and until it is styled with CSS.
  • <summary> HTML Tag: The <summary> HTML Tag is related to <aside> HTML Tag because they are both style and semantic tags. The <summary> HTML Tag specifies a summary, caption, or legend for the disclosure box of a <details> HTML Tag.
  • <article> HTML Tag: The <article> HTML Tag is related to <aside> HTML Tag because they are both semantic and style tags. The <article> HTML Tag specifies a self-contained composition in a document, page, application, or site that is meant to be distributable or reusable independently.
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