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Aside element

The HTML aside element represents content tangentially related to surrounding content, such as supplementary information or a sidebar.

How 2 Manning books explain it

Build a Website with ChatGPT

The aside element is an HTML element that represents content indirectly related to the document's main content, such as a sidebar.

How it is used
Marks up a sidebar containing content indirectly related to an article or other unique main content.
How deep it goes
Defines purpose, placement, common contents, generated markup, manual editing, and CSS Grid customization.
Examples
Uses related-guide links, site news, social media feeds, advertisements, and a Travel Guide to Narnia sidebar.
What you can do after
Build it from scratch by adding a titled sidebar, filling its placeholder, and repositioning it with HTML and CSS Grid.

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Web Design Playground

Content that is tangentially related to the main flow of a page, often presented as complementary or sidebar material.

How it is used
Marks complementary content that is tangential to a page’s unique content, such as news, feeds, quotations, or a sidebar.
How deep it goes
Defines purpose, placement, repetition, responsive visibility, and column layout, but defers advanced layout to flexbox.
Examples
Uses site news, a social feed, a related quotation, and article-sidebar column layouts as concrete examples.
What you can do after
Apply it via HTML and CSS to structure complementary content and show or hide optional sidebars across screen sizes.

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Related concepts

These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.