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Re: [WebIDL] Exceptions

From: Brendan Eich <brendan@mozilla.org>
Date: Thu, 7 Jul 2011 10:21:33 -0700
Cc: Jonas Sicking <jonas@sicking.cc>, Anne van Kesteren <annevk@opera.com>, WebApps WG <public-webapps@w3.org>, public-script-coord@w3.org
Message-Id: <E78BB7B8-AA5B-49CD-91C0-C17005A1C7A6@mozilla.org>
To: Aryeh Gregor <Simetrical+w3c@gmail.com>
On Jul 7, 2011, at 10:09 AM, Aryeh Gregor wrote:

> On Wed, Jul 6, 2011 at 9:46 PM, Brendan Eich <brendan@mozilla.org> wrote:
>> Gecko is buggy if it is using the dynamic scope. Please file that bug and cc: me.
> Gecko says the exception is an instanceof the DOMException object that
> corresponds to *any* window.  So e instanceof window1.DOMException and
> also e instanceof window2.DOMException.  IIRC, there's already a bug
> filed on this, but I can't find it.

Oh, I dimly recall this now. Earl adaptation to help developers confused by the cross-frame instanceof failure case? Not sure how early but I think it's pretty old.

If you use Object.getPrototypeOf in a loop (hand-expand instanceof), you can probably find out which window's DOMException.prototype is on the chain. That would be interesting.

Received on Thursday, 7 July 2011 17:22:03 UTC

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