Use the role attribute with one of the non-abstract values defined in the WAI-ARIA roles specification. The WAI-ARIA specification provides an informative description of each role, how it relates to other roles, and the states and properties for each role.
The engine scans all element using role attribute for correct value according to WAI-Aria specification
users who use assistive tools, such as screen readers will fail to understand properly the role of the element
role="button" instead of role="btn"