Nodejs Utililty Methods HTML Element Event Add

HTMLElement.prototype.addEvent = function (event, callback, bubble) {
    this.addEventListener(
        event,
        function (event) {
            try {
                callback.apply(this, arguments);
            } catch (e) {
                console.log(e);
            event.preventDefault();
            return false;
        },
        bubble);
};

HTMLElement.prototype.addClickEvent = function addClickEvent(func) {
    this.addEvent("click", func, false);
};

Element.prototype.delegate = function(eventName, elementSelector, cb) {
  var _this = this
  _this.addEventListener(eventName, function(evt) {
    var _this = evt.target
    if (_this.is(elementSelector)) {
      cb.call(_this, evt)
    if (_this.parentNode.is(elementSelector)) {
      cb.call(_this.parentNode, evt)
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