apollo.js

(function () {
     
    var apollo = {};
     
    apollo.hasClass = function (elem, className) {
        return elem.classList.contains(className);
    };
     
    apollo.addClass = function (elem, className) {
        elem.classList.add(className);
    };
     
    apollo.removeClass = function (elem, className) {
        elem.classList.remove(className);
    };
     
    apollo.toggleClass = function (elem, className) {
        elem.classList.toggle(className);
    };
     
    window.apollo = apollo;
     
})();
 
apollo.addClass(document.body, 'test');