Rule: `onClick` event handlers must have widget role

Rule ID	Widget 2
Conformance	Required
Definition	Elements with `onClick` event handlers must be a link, button or have a widget role.
Purpose	Elements with `onClick` event handlers must be a link, form control or have a widget role. NOTE: This rule can only identify elements using the `onclick` attribute. There is currently no programatic way to detect elements with `click` events added using `addEventListener`.
Conformance	Required
WCAG Success Criteria	Success Criterion 4.1.2 Name, Role, Value Other Related Success Criterion: Success Criterion 1.3.1 Info and Relationships Success Criterion 3.3.2 Labels or Instructions
Rule Category	ARIA Widgets
Rule Scope	Element
Techniques	Use ARIA widget roles on non-form controls to describe their function on the page.
Information Links	Accessible Rich Internet Applications (WAI-ARIA) 1.2 Specification: Widget Roles ARIA Authoring Practices: Keyboard Navigation Inside Components G108: Using markup features to expose the name and role, allow user-settable properties to be directly set, and provide notification of changes ARIA4: Using a WAI-ARIA role to expose the role of a user interface component ARIA Authoring Practices MDN Web Docs: ARIA Web Fundamentals: Introduction to ARIA

Rule: onClick event handlers must have widget role