`onClick` event handlers must have role

Rule ID	Widget 2
Definition	Elements with `onClick` event handlers must be a link, button or have a widget role with tabindex.
Purpose	Elements with `onClick` event handlers must be a link, form control or have a widget role.
Mappings	HTML5 and ARIA Techniques (Required)
WCAG Success Criteria	4.1.2 Name, Role, Value (Level A, Primary Success Criterion) Other Related Success Criterion: 1.3.1 Info and Relationships (Level A) 3.3.2 Labels or Instructions (Level A)
Rule Category	Widgets/Scripting
Scope	Element
Target Resources	Elements with `onClick` event handler values that are defined as widgets
Techniques	Use ARIA widget role on non-form controls to describe their function on the page.
Informational Links	Accessible Rich Internet Applications (WAI-ARIA) 1.2 Specification: Widget Roles WAI-ARIA 1.2 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

onClick event handlers must have role