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<aside> HTML aside element
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The <aside> HTML 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.
<p>
Salamanders are a group of amphibians with a lizard-like appearance, including
short legs and a tail in both larval and adult forms.
</p>
<aside>
<p>The Rough-skinned Newt defends itself with a deadly neurotoxin.</p>
</aside>
<p>
Several species of salamander inhabit the temperate rainforest of the Pacific
Northwest, including the Ensatina, the Northwestern Salamander and the
Rough-skinned Newt. Most salamanders are nocturnal, and hunt for insects,
worms and other small creatures.
</p>
aside {
width: 40%;
padding-left: 0.5rem;
margin-left: 0.5rem;
float: right;
box-shadow: inset 5px 0 5px -5px #29627e;
font-style: italic;
color: #29627e;
}
aside > p {
margin: 0.5rem;
}
- Do not use the
<aside> element to tag parenthesized text, as this kind of text is considered part of the main flow.
- The
<aside> element has an implicit role of complementary, unless it has no accessible name and is nested in sectioning content, in which case it has the generic role.
This example uses <aside> to mark up a paragraph in an article. The paragraph is only indirectly related to the main article content:
html <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>
Result
- Other section-related elements:
<body>, <article>, <section>, <nav>, h1, h2, h3, h4, h5, h6, <hgroup>, <header>, <footer>, <address>;
- Using HTML sections and outlines
- ARIA: Complementary role
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