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Re: WebIDL and prototype chains

From: Jonas Sicking <jonas@sicking.cc>
Date: Thu, 16 Jul 2009 13:13:29 -0700
Message-ID: <63df84f0907161313y3ac59209nd6e49e49881f0bf2@mail.gmail.com>
To: Adam Barth <w3c@adambarth.com>
Cc: public-webapps <public-webapps@w3.org>, Maciej Stachowiak <mjs@apple.com>
On Thu, Jul 16, 2009 at 10:45 AM, Adam Barth<w3c@adambarth.com> wrote:
> When a browser creates an instance of a DOM object defined by an
> WebIDL interface, the browser must choose where to connect it's
> prototype chain.  For example, consider this case (where frames[0] is
> a same-origin child frame):
>
> var doc = frames[0].document;
>
> 1) To which global object's prototypes ought |doc| connect to, the
> parent frame running the script or the child frame from which we
> obtained the document?
>
> My best guess is that the prototype chain ought to connect to the
> child's prototype

Absolutely. |doc| will simply be pointing to the same object that
frames[0].document does. So the prototype chain must be the same for
both. And it's clear that when code inside frames[0] accesses that
frames document it should have a protochain based on the globals in
that frame.

I don't have any strong opinions on where this is specced.

/ Jonas
Received on Thursday, 16 July 2009 20:14:29 GMT

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