Modern browser version of https://github.com/chrismauck/cls-js; Helper functions for class manipulation

cls.js

/*
 * cls - helper functions for class manipulation
 * https://github.com/chrismauck/cls-js
 * 
 * cls.hasClass( elem, 'class-name' )       => boolean check
 * cls.addClass( elem, 'class-name' )       => add class(es)
 * cls.removeClass( elem, 'class-name' )    => remove class(es)
 * cls.toggleClass( elem, 'class-name' )    => toggle class(es)
 */

(function(window) {
    'use strict';
    cls = {
        hasClass: function(e, c) { return e.classList.contains(c); },
        addClass: function(e, c) { e.classList.add(c); },
        removeClass: function(e, c) { (c) ? e.classList.remove(c) : e.className = ''; },
        toggleClass: function(e, c) { var _this = e, names = c.split(/[ ,]+/).forEach(function(n){ _this.classList.toggle(n); }); }
    };
    (typeof define === 'function' && define.amd) ? define(cls) : window.cls = cls;
})(window);