Definition

WAI-ARIA

A set of HTML attributes that describe the role and state of rich components to assistive technologies.

WAI-ARIA (Accessible Rich Internet Applications) provides attributes such as role, aria-label or aria-expanded. They give screen readers the information that an interactive component does not convey naturally.

Useful rule: prefer a native HTML element when one exists, and reserve ARIA for cases where standard HTML is not enough. Misused ARIA can degrade accessibility.