es7 proposal/polyfill?: base Map/WeakMap off Proxy + Weak References

Tab Atkins Jr. jackalmage at
Fri Feb 19 21:03:55 UTC 2016

On Fri, Feb 19, 2016 at 12:59 PM, Boris Zbarsky <bzbarsky at> wrote:
> On 2/19/16 3:50 PM, Coroutines wrote:
>> Side discussion: Why does Javascript have this limitation? - what I
>> view as a limitation?  You'd think this could be supported without
>> breaking older JS..
> I don't see how it could.  I'll bet $50 someone out there is using
> obj[location] for example.

Yes, relying on the stringification behavior is very common.
Absolutely no way to change it at this point without something like
AWB's (abandoned) Object Model Reformation proposal
that would allow changing the behavior of [].


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