Use Chrome's webkit inspector to remove an event listener

Question

I know you can see the event listeners in the Chrome Inspector but i'm doing some debugging work and there are so many event listeners lying around I'd like to disable some without editing the code

Is there a way to disable an event listener quickly from the Webkit inspector?

Perhaps have a look and type some code into the console to removeEventListener the listener? How would I do this? For instance how would i remove the 'click' listener above

Answer 1

You can use getEventListeners(element).click[index].listener to get a reference to a listener (in a WebKit console).

So, to remove the first listener, you could do:

document.removeEventListener('click', getEventListeners(document).click[0].listener)

Similarly, to remove all listeners, you could use this function:

function removeEventListeners(element, listenerMap) {
    Object.keys(listenerMap).forEach(function (name) {
        var listeners = listenerMap[name];
        listeners.forEach(function (object) {
            element.removeEventListener(name, object.listener);
        });
    });
}

removeEventListeners(document, getEventListeners(document))

Answer 2

Sorry, you are out of luck (at least for the time being.) removeEventListener requires the exact listener Function object as an argument, and DevTools do not let you get a grip of the listener function in any way.

If you definitely need this feature, please file a bug at http://new.crbug.com (against Chrome) or http://bugs.webkit.org (against WebKit, the preferred way).

Answer 3

You can remove an event listener in the javascript console. First find the element to which this event listener is attached. Let's call it e. Then you execute: e.onclick=null. For example, many event listeners are attached to "body", then the above code becomes： document.body.onclick=null. After that the event listener is removed.