function getObservedRoleForElement()

in src/scanner/custom-rules/unique-landmark.ts [61:88]

• 28 lines of code
• 12 McCabe index (conditional complexity)

function getObservedRoleForElement(element: any): any {
    let role = element.getAttribute('role');
    role = role ? role.trim() : role;
    if (!role) {
        role = axe.commons.aria.implicitRole(element);
        const tagName = element.tagName.toLowerCase();
        if (tagName === 'header' || tagName === 'footer') {
            let parent = element.parentNode;
            while (parent && parent.nodeType === 1) {
                const parentTagName = parent.tagName.toLowerCase();
                const excludedDescendants = ['article', 'aside', 'main', 'nav', 'section'];
                if (excludedDescendants.indexOf(parentTagName) >= 0) {
                    role = null;
                }
                parent = parent.parentNode;
            }
        } else if (tagName === 'section' || tagName === 'form') {
            const label = axe.commons.aria.label(element);
            if (!label) {
                role = null;
            }
        }
    }
    if (role) {
        role = role.toLowerCase();
    }
    return role;
}