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Applicability
This rule applies to any element with an aria-hidden attribute value of true.
Expectation
None of the target elements has an inclusive descendant in the flat tree that are focusable and part of the sequential focus navigation.
Assumptions
Interacting with the page does not result in changing the aria-hidden attribute value of target elements. An example of such a situation would be when closing a modal dialog makes previously hidden elements that were not focusable or part of the sequential focus navigation become focusable and part of the sequential focus navigation.