HTML5 Sectioning Elements
It is important to understand that many HTML5 sectioning (e.g. main,nav, aside …) elements by default define ARIA landmarks.
If HTML5 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.
HTML5 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 HTML5 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 HTML5 sectioning elements:
- article
- aside
- main
- nav
- section
main
main
nav
navigation
section
region when it has an accessible name using aria-labelledby, aria-label or title attribute