Detecting the "type" of a DOM object
bruant.d at gmail.com
Mon Jun 25 06:11:59 PDT 2012
Le 25/06/2012 15:07, Rick Waldron a écrit :
> On Monday, June 25, 2012 at 4:28 AM, Brendan Eich wrote:
>> David Bruant wrote:
>>> Le 24/06/2012 14:51, Brendan Eich a écrit :
>>>> David Bruant wrote:
>>>>> Instead of adding a new [[instanceofHint]] internal property,
>>>>> maybe the
>>>>> [[NativeBrand]] could be reused.
>>>> +1 on that, which suggests [[NativeBrandMatch]] instead of
>>>> Your proposal is more general but I think we should extend HasInstance
>>>> only very concretely, with what's needed for WebIDL, and probably for
>>>> any such system that reflects nominal types.
>>> What form would it take?
>>> The constraints of enabling implementations of WebIDL in pure ES6
>>> (which, on the ES side is bound to the goal of getting rid of host
>>> objects) seems to force towards a general proposal.
>> One idea: expose [[NativeBrand]] as a private name object available,
>> depending on implementation details, only to privileged code.
> Can you give an example or scenario in which a given piece of code
> would be considered privileged?
(like changing dynamically the [[NativeBrand]]) can be useful.
I'm still internally debating whether this particular case would be
useful for writing code or whether it would be just a "spec toy".
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