HTML Sectioning Elements

It is important to understand that many HTML sectioning (e.g. main, nav, aside ...) elements by default define ARIA landmarks. If HTML sectioning elements are used without understanding the associated landmark structure, assistive technology users will most likely be confused and less efficient in accessing content and interacting with web pages.

HTML Element	Default Landmark Role
`aside`	`complementary`
`footer`	`contentinfo` when in context of the `body` element. The `footer` element is not a `contentinfo` landmark when it is a descendant of the following HTML sectioning elements:

article
aside
main
nav
section

| | form | form when it has an accessible name using aria-labelledby, aria-label or title attributes | | header | banner when in context of the body element. The header element is not a banner landmark when it is a descendant of the following HTML sectioning elements:

article
aside
main
nav
section