Re: Exceptions in event listeners triggered by dispatchEvent().

On Mon, Jun 17, 2013 at 5:38 PM, John Barton <johnjbarton@google.com>wrote:
> Check-boxes are changed asynchronously (by XHR processing) all of the time.
>
That's not the asynchronicity we're talking about. The event happens
synchronously with changing the checkbox value (and possibly changing it
back); they all happen in the same task.
On Mon, Jun 17, 2013 at 5:51 PM, Bjoern Hoehrmann <derhoermi@gmx.net> wrote:
> And even the usual pattern is fairly defective when you
> have more than one listener and only want to react to an event if it is
> not canceled by any of the listeners, or want to undo any side-effects
>
> if it was canceled as the case may be; only the dispatching code can do
> that properly.
>
(The event model doesn't have a direct way to add an event listener that
only runs if no other listener called preventDefault, but this seems a bit
tangental.)
-- 
Glenn Maynard