Re: Thoughts on ES5 binding modifications (was: RE: Java bindings generated from Web IDL)

On 10/21/2010 11:50 PM, Travis Leithead wrote:
> OK, looking forward to a discussion around this. In IE9, we are
> mixing in interfaces (and inherited interfaces of mixin interfaces)
> onto the "implements" target's prototype.
>
> For example:
>
> [NoInterfaceObject] interface EventTarget { void
> addEventListener(..); };
>
> Window implements EventTarget; Node implements EventTarget;
> XMLHttpRequest implements EventTarget;
>
> The above would create three copies of the addEventListener API on
> each of Window.prototype, Node.prototype, and
> XMLHttpRequest.prototype. We favored this simplicity over the desire
> to have a single addEventListener definition that could be configured
> to affect all implementing interfaces. The extra redundancy in API
> definitions hasn't posed a problem for us yet :)

Why couldn't Window, Node and XHR just (effectively) inherit
EventTarget so that .prototype.prototype had addEventListener (only one 
copy)?


-Olli