Rule: Attributes that start with aria- must be defined.

Rule ID Widget 5
Conformance Required
Definition Elements with the attributes that start with aria- must be a valid ARIA property or state.
  • ARIA attributes must be defined properties or states to accurately describe web content to users of assistive technologies, especially screen reader users
Conformance Required
WCAG Success Criteria

Success Criterion 4.1.2 Name, Role, Value

Rule Category ARIA Widgets
Rule Scope Element
  • Use defined ARIA properties and states in the ARIA specification.
  • Check W3C WAI Accessible Rich Internet Applications specifications for allowed values for ARIA attributes.
Information Links