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Re: May the defineProperty method of a proxy handler throw a TypeError?

From: Mark S. Miller <erights@google.com>
Date: Wed, 10 Aug 2011 19:45:17 -0700
Message-ID: <CABHxS9j_5gnQUVZW3Qwexrjc+4Y5revwBbFkvSOtc5xC6e+QtQ@mail.gmail.com>
To: Cameron McCormack <cam@mcc.id.au>
Cc: David Flanagan <dflanagan@mozilla.com>, Tom Van Cutsem <tomvc.be@gmail.com>, "public-script-coord@w3.org" <public-script-coord@w3.org>, es-discuss <es-discuss@mozilla.org>
On Wed, Aug 10, 2011 at 7:20 PM, Cameron McCormack <cam@mcc.id.au> wrote:

> On 9/08/11 9:40 AM, Mark S. Miller wrote:
>> If there are no show-stopping legacy compat constraints forcing us to
>> specify Reject, I prefer that we specify these to throw a TypeError.
> I can't say for sure, but I would be surprised if this didn't cause
> problems, given that it introduces exception throwing where currently
> assignment to non-writable properties of objects that need to be implemented
> as proxies (like NodeList) is just ignored.

Ok. If we decide not to, then I think it is important that proxies be able
to faithfully emulate ES5 failed "Reject" semantics, so that ES-next code
can fully implement a conformant DOM.

Received on Thursday, 11 August 2011 02:45:43 UTC

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