axe-core/lib/rules/heading-matches.js

Accessibility engine for automated Web UI testing

// Get all valid roles
let explicitRoles;
if (node.hasAttribute('role')) {
	explicitRoles = node.getAttribute('role').split(/\s+/i)
		.filter(axe.commons.aria.isValidRole);
}

// Check valid roles if there are any, otherwise fall back to the inherited role
if (explicitRoles && explicitRoles.length > 0) {
	return explicitRoles.includes('heading');
} else {
	return axe.commons.aria.implicitRole(node) === 'heading';
}