Is there any way to know the handlers registered to an event?

[WenDong Zhang]

such as:

function foo(){}
function bar(){}

ele.addEventListener('click', foo, false);
ele.addEventListener('click', bar, false);

// the method to list the handlers registered to ele.onclick
foo, bar.

thanks.

--
Best Regards!
Wen Dong

[Jonas Sicking]

WenDong Zhang wrote:
> such as:
>
> function foo(){}
> function bar(){}
>
> ele.addEventListener('click', foo, false);
> ele.addEventListener('click', bar, false);
>
> // the method to list the handlers registered to ele.onclick
> foo, bar.

From a web page there is no way no.

You could do something like:

Node.prototype.myAddEventListener(event, handler, capture) {
handlerArray = this.getUserData('handlers');
if (!handlerArray) {
handlerArray = [];
this.setUserData('handlers', handlerArray, null);
}
handlerArray.push(handler);
this.addEventListener(event, handler, capture);
}

Then you can simply call node.getUserData('handlers') to get a list of
all handlers that you've registered. And replace all calls to
addEventListener with myAddEventListener.

/ Jonas