jQuery replacement functions

class inspector replacements

function hasClass(element, class_name) {
   return element.classList.contains(class_name);
}

function addClass(element, class_name) {
    if (!hasClass(element, class_name)) {
        element.classList.add(class_name)
    };
}

function removeClass(element, class_name) {
    if (hasClass(element, class_name)) {
        element.classList.remove(class_name)
    };
}