On Wed, Jan 21, 2015 at 12:51 PM, Jordan Harband <[email protected]> wrote:
> To reiterate, I see the issue as boiling down to two questions: > 1) Should builtins have their @@toStringTag value configurable? > Can anyone provide a use case, or any value, to allowing this? If not, I > think they should not be configurable. I'd be very interested to hear why > it would aid debugging, or help Domenic's DOM concerns (which are totally > valid and admirable), or help with extensibility? > > 2) Should non-builtin JS values be able to pretend to be builtins via > spoofing @@toStringTag? > If the answer to (1) is "every builtin's @@toStringTag is not > configurable" then I think I'm actually comfortable with a value explicitly > pretending to be an Array, for example, and risking the consequences of > doing that incorrectly. In this scenario, dropping the prefixing entirely > makes sense to me. > > However, if the answer to (1) is "builtins' @@toStringTag is > configurable", then this question needs to be modified. > > I see no need to drop @@toStringTag, and little need to keep the prefixing > at all, if all builtins (not just ES5 ones) have a > nonconfigurable @@toStringTag. > > It also suddenly occurs to me that the ability to pretend to be a builtin > will in fact be very useful to me, personally, for the es*-shims. > > Is there anyone who wouldn't be happy with "all builtins' @@toStringTag is > not configurable" and "drop the ~ prefixing completely"? > Just checking: Are we talking about adding it to each instance as unconfigurable? > > On Wed, Jan 21, 2015 at 11:05 AM, Brendan Eich <[email protected]> > wrote: > >> Brendan Eich wrote: >> >>> Sure -- good point, I flinched and was slot >>> >> >> "slow", lulz. >> >> /be >> >>> to say "internal property" because we all don't like infernal slots. ;-) >>> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > -- Text by me above is hereby placed in the public domain Cheers, --MarkM
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