Centers for Disease Control and Prevention | CDC

Elements should not have tabindex greater than zero

Ensure tabindex attribute values are not greater than 0

Elements should not have tabindex greater than zero

Ensure tabindex attribute values are not greater than 0

Elements should not have tabindex greater than zero

Ensure tabindex attribute values are not greater than 0

Contentinfo landmark should not be contained in another landmark

Ensure the contentinfo landmark is at top level

Document should not have more than one banner landmark

Ensure the document has at most one banner landmark

Document should not have more than one contentinfo landmark

Ensure the document has at most one contentinfo landmark

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination

Ensure landmarks are unique

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination

Ensure landmarks are unique

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination

Ensure landmarks are unique

Page should contain a level-one heading

Ensure that the page, or at least one of its frames contains a level-one heading

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

The skip-link target should exist and be focusable

Ensure all skip links have a focusable target