<aside>
Widely available
The <aside> element represents a portion of a document whose content is only indirectly related to the document's main content.
Compatibility
- Chrome 5 Released on 2010-05-25
- Chrome Android 18 Released on 2012-06-27
- Edge 12 Released on 2015-07-29
- Firefox 4 Released on 2011-03-22
- Firefox for Android 4 Released on 2011-03-29
- Safari 5 Released on 2010-06-07
- Safari on iOS 4.2 Released on 2010-11-22
MDN docs
Specifications
- HTML Standard, from HTML Workstream (WHATWG).