Re: Solving the "how do I tell whether I have an HTML element?" (or image element, or whatever) problem from Boris Zbarsky on 2013-01-01 (public-script-coord@w3.org from January to March 2013)

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Tue, 01 Jan 2013 14:06:03 -0500
To: public-script-coord@w3.org
Message-ID: <50E3339B.8040406@mit.edu>

On 1/1/13 2:08 AM, Brendan Eich wrote:
> Private reply:
>
> Boris Zbarsky wrote:
>> 1)  Hack instanceof as Gecko has in the past.  This is actually a bit
>> of a pain to implement even in Gecko, without changes to SpiderMonkey,
>> because function objects can't have the magic behavior the RHS needs
>> above in SpiderMonkey at the moment.
>
> What's missing? I still see Class::hasInstance in jsclass.h.

Functions can't have a custom JSClass in SpiderMonkey.  They always have 
js::FunctionClass.

-Boris

Received on Tuesday, 1 January 2013 19:06:33 UTC