var handler = function() { alert('clicked!') };

element.onclick = handler;
// inspect
alert(element.onclick); // alerts "function() { alert('clicked!') }"

if(element.addEventListener) { // DOM standard
    element.addEventListener('click', handler, false)
} else if(element.attachEvent) { // IE
    element.attachEvent('onclick', handler)
}
// cannot inspect element to find handlers

$(element).click(handler);

$(element).observe('click', handler);

function reportIn(e){
    var a = this.lastListenerInfo[this.lastListenerInfo.length-1];
    console.log(a)
}

HTMLAnchorElement.prototype.realAddEventListener = HTMLAnchorElement.prototype.addEventListener;

HTMLAnchorElement.prototype.addEventListener = function(a,b,c){
    this.realAddEventListener(a,reportIn,c); 
    this.realAddEventListener(a,b,c); 
    if(!this.lastListenerInfo){  this.lastListenerInfo = new Array()};
    this.lastListenerInfo.push({a : a, b : b , c : c});
};

getEventListeners(document.getElementByID('btnlogin'));
getEventListeners($('#btnlogin'));

$(selector).data("events")

$._data(element, "events")

var $myLink = $('a.myClass');
console.log($._data($myLink[0], "events").click);

(function() {
  Element.prototype._addEventListener = Element.prototype.addEventListener;
  Element.prototype.addEventListener = function(a,b,c) {
    this._addEventListener(a,b,c);
    if(!this.eventListenerList) this.eventListenerList = {};
    if(!this.eventListenerList[a]) this.eventListenerList[a] = [];
    this.eventListenerList[a].push(b);
  };
})();

var clicks = someElement.eventListenerList.click;
if(clicks) clicks.forEach(function(f) {
  alert("I listen to this function: "+f.toString());
});

if(someElement.onclick)
  alert("I also listen tho this: "+someElement.onclick.toString());

someElement.onclick = someHandler; // IDL attribute
someElement.setAttribute("onclick","otherHandler(event)"); // content attribute

var click = someElement.getAttribute("onclick");
if(click) alert("I even listen to this: "+click);

<script>
    (function(w){
        var originalAdd = w.addEventListener;
        w.addEventListener = function(){
            // add your own stuff here to debug
            return originalAdd.apply(this, arguments);
        };

        var originalRemove = w.removeEventListener;
        w.removeEventListener = function(){
            // add your own stuff here to debug
            return originalRemove.apply(this, arguments);
        };
    })(window);
</script>

console.dir(clickEvents);

console.dir(window);

(function() {
  Element.prototype._addEventListener = Element.prototype.addEventListener;
  Element.prototype.addEventListener = function(a,b,c) {
    if(c==undefined)
      c=false;
    this._addEventListener(a,b,c);
    if(!this.eventListenerList)
      this.eventListenerList = {};
    if(!this.eventListenerList[a])
      this.eventListenerList[a] = [];
    //this.removeEventListener(a,b,c); // TODO - handle duplicates..
    this.eventListenerList[a].push({listener:b,useCapture:c});
  };

  Element.prototype.getEventListeners = function(a){
    if(!this.eventListenerList)
      this.eventListenerList = {};
    if(a==undefined)
      return this.eventListenerList;
    return this.eventListenerList[a];
  };
  Element.prototype.clearEventListeners = function(a){
    if(!this.eventListenerList)
      this.eventListenerList = {};
    if(a==undefined){
      for(var x in (this.getEventListeners())) this.clearEventListeners(x);
        return;
    }
    var el = this.getEventListeners(a);
    if(el==undefined)
      return;
    for(var i = el.length - 1; i >= 0; --i) {
      var ev = el[i];
      this.removeEventListener(a, ev.listener, ev.useCapture);
    }
  };

  Element.prototype._removeEventListener = Element.prototype.removeEventListener;
  Element.prototype.removeEventListener = function(a,b,c) {
    if(c==undefined)
      c=false;
    this._removeEventListener(a,b,c);
      if(!this.eventListenerList)
        this.eventListenerList = {};
      if(!this.eventListenerList[a])
        this.eventListenerList[a] = [];

      // Find the event in the list
      for(var i=0;i

var bodyClickEvent = document.body.addEventListener("click", function () {
    console.log("body click");
});

// bodyClickEvent.remove();

// EventListeners.get(document.body);
// EventListeners.get("click");

// ==UserScript==
// @name         New Userscript
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @include      https://stackoverflow.com/*
// @grant        none
// ==/UserScript==

(function() {
    fetch("https://raw.githubusercontent.com/akinuri/js-lib/master/EventListener.js")
        .then(function (response) {
            return response.text();
        })
        .then(function (text) {
            eval(text);
            window.EventListeners = EventListeners;
        });
})(window);

function(b){return"undefined"!=typeof r&&r.event.triggered!==b.type?r.event.dispatch.apply(a,arguments):void 0}

$(document.body).click(function () {
    console.log("jquery click");
});

function get_element_registry(element) {
    var cache = Event.cache;
    if(element === window) return 0;
    if(typeof element._prototypeUID === 'undefined') {
        element._prototypeUID = Element.Storage.UID++;
    }
    var uid =  element._prototypeUID;           
    if(!cache[uid]) cache[uid] = {element: element};
    return cache[uid];
}

    $(document).ready(function(){

        var node = $('body');

        // Bind 3 events to body click
        node.click(function(e) { alert('hello');  })
            .click(function(e) { alert('bye');  })
            .click(fun_1);

        // Inspect the events of body
        var events = $._data(node[0], "events").click;
        var ev1 = events[0].handler // -> function(e) { alert('hello')
        var ev2 = events[1].handler // -> function(e) { alert('bye')
        var ev3 = events[2].handler // -> function fun_1()

        $('body')
            .append('<p> Event1 = ' + eval(ev1).toString() + '</p>')
            .append('<p> Event2 = ' + eval(ev2).toString() + '</p>')
            .append('<p> Event3 = ' + eval(ev3).toString() + '</p>');        

    });

    function fun_1() {
        var txt = 'text del missatge';   
        alert(txt);
    }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

EventTarget.prototype.addEventListener
EventTarget.prototype.attachEvent
EventTarget.prototype.removeEventListener
EventTarget.prototype.detachEvent

console.log(someElement.onclick);
console.log(someElement.getAttribute("onclick"));