WAI-ARIA Support
RadStepper follows the WAI-ARIA Authoring Practices for implementing the keyboard navigation for its component role.
The Stepper uses the aria-current="true" attribute to mark the current StepperStep and the aria-disabled property to mark the disabled state of each step.
An issue with the use of WAI-ARIA in HTML documents is that they don’t validate. When you run a HTML document containing ARIA attributes through the W3C Validator it shows errors in the results for any ARIA attributes. The DOCTYPE declarations do not include any information about the WAI ARIA attributes and you cannot have a valid document which includes elements, attributes, and attribute values, not detailed in its DTD’s.