Certain ARIA roles must contain particular children
Some ARIA parent
role values applied to elements must contain specific child elements and
role values to perform intended accessibility function.
Why it Matters
For each role, WAI-ARIA explicitly defines which child and parent roles are allowable and/or required. ARIA
roles missing required child
roles will not be able to perform the accessibility functions intended by the developer.
Assistive technology needs to convey the context to the user. For example, in a
treeitem, it is important to know the parent (container), item, or siblings in the folder. This can be done in two ways:
- Code order or DOM: The necessary context is often clear from the code order or DOM.
- ARIA: ARIA (such as
aria-owns) can be used provide the relationships when the hierarchy is not the same as the code structure or DOM tree.
How to Fix the Problem
Ensure elements including explicit or implicit ARIA roles include required children elements.
The following attribute values indicate relationships between element that cannot be readily determined from the document structure. The relationships are linked to characteristics tables that list explicit and implicit
role attribute values as well as
role attribute values inherited by nested children elements.
The Algorithm (in simple terms)
Checks all elements that contain a WAI-ARIA role to ensure that all required children roles are present.