javascript - attachEvent 或 addEventListener - 存储在哪里？

Question

在 jQuery 中，如果我这样做...

$('a').click(function(){
    // Do something 
});

...点击事件存储在 $('a').data('events') 中，我可以像这样获取它:

jQuery.each($('a').data('events'), function(i, event){  
    jQuery.each(event, function(i, handler){
        if(handler.type.toString() == 'click')
        {
            // do something
        }
    });
});

通过 attachEvent 或 addEventListener 附加的事件显然不会出现在 $('a').data('events')。有什么我可以迭代的地方吗？我假设他们在某个地方排队，但我找不到可以为我指明正确方向的文档。

Answer 1

来自 quirksmode :

One problem of the current implementation of W3C’s event registration model is that you can’t find out if any event handlers are already registered to an element. In the traditional model you could do:

alert(element.onclick)

and you see the function that’s registered to it, or undefined if nothing is registered. Only in its very recent DOM Level 3 Events W3C adds an eventListenerList to store a list of event handlers that are currently registered on an element. This functionality is not yet supported by any browser, it’s too new. However, the problem has been addressed.