Elements must only use allowed ARIA attributes
Not all ARIA role-attribute combinations are valid. This Rule checks that each role is supplied with allowed attributes.
Why it Matters
Using ARIA attributes in roles where they are not allowed can interfere with the accessibility of the web page. Using an invalid role-attribute combination will, at best, result in no effect on the accessibility of the application and, at worst, may trigger behavior that disables accessibility for entire portions of an application.
When ARIA attributes are used on HTML elements that are not in accordance with WAI-ARIA 1.1, they conflict with the semantics of the elements which can cause assistive technology products report nonsensical user interface (UI) information that does not represent the actual UI of the document.
How to Fix the Problem
ARIA explicitly defines which attributes are allowed for any given role and for every attribute, where that attribute may be used. The detailed information on each attribute can be found by looking at the documentation for each role and/or each attribute.
Specific Reference: For more information about which ARIA attributes may or should not be used by HTML element, see ARIA in HTML – Document conformance requirements for use of ARIA attributes in HTML .
The Algorithm (in simple terms)
Checks that each element with an ARIA role uses only ARIA attributes allowed for that role.