complementary landmark must be a top-level landmark.
complementary landmarks provide a way to identify sections of a page that may not be considered the main content, but that provide important supporting or related information to the main content.
- Top-level landmarks are the easiest to find and navigate to using assistive technologies.
HTML4 Legacy Techniques
HTML5 and ARIA Techniques
|WCAG Success Criteria
1.3.1 Info and Relationships (Level A, Primary Success Criterion)
- Use an
aside element to define a
- If the
aside element technique is not being used, a
role="complementary" attribute on the container element of the supporting content can be used to define a
- When creating the landmark structure on the page, ensure that the
complementary landmark is a top-level landmark (i.e., it is not contained within any other landmarks).