Re: Passing JavaScript Function object to EventTarget.addEventListener()

Sergey Yanovich wrote:
> [1] specifies that the second argument taken by addEventListener to be 
> an EventListener instance. However, Mozilla accepts plain Function 
> objects just fine.
> 
> Could anyone provide any pointers why this works (is this a DOM feature 
> or an extension), and in which module this is implemented (dom, content, 
> or xpconnect maybe)?

Because in the idl source for nsIDOMEventListener (at 
http://mxr.mozilla.org/mozilla-central/source/dom/public/idl/events/nsIDOMEventListener.idl 
), the interface is marked with 'function'.