no-jquery.js

var $ = document.querySelectorAll.bind(document)
var $$ = document.querySelector.bind(document)

Element.prototype.on = Element.prototype.addEventListener;
NodeList.prototype.on = function (event, fn) {
    []['forEach'].call(this, function (el) {
        el.on(event, fn);
    });
    return this;
};
Element.prototype.hasClassName = function (a) {
    return new RegExp("(?:^|\\s+)" + a + "(?:\\s+|$)").test(this.className);
};

Element.prototype.addClassName = function (a) {
    if (!this.hasClassName(a)) {
        this.className = [this.className, a].join(" ");
    }
};

Element.prototype.removeClassName = function (b) {
    if (this.hasClassName(b)) {
        var a = this.className;
        this.className = a.replace(new RegExp("(?:^|\\s+)" + b + "(?:\\s+|$)", "g"), " ");
    }
};
Element.prototype.toggleClassName = function (a) {
  this[this.hasClassName(a) ? "removeClassName" : "addClassName"](a);
};



// el loop
[]['some' | 'map' | 'forEach'].call($('.menu a'), function(el) {
});