Filters elements by their aria-current state. true and false match aria-current="true" and aria-current="false" (as well as a missing aria-current attribute) respectively.
If true includes elements in the query set that are usually excluded from the accessibility tree. role="none" or role="presentation" are included in either case.
Includes elements with the "heading" role matching the indicated level, either by the semantic HTML heading elements <h1>-<h6> or matching the aria-level attribute.