Proposal to add symbol: "hasInstanceStrict"

Aleksander Efremov mr.efrem at
Mon Feb 19 16:50:01 UTC 2018

In my first example you can found what I mean. There not only function.
Just instead of that function can be black box results which we must check
on assignment to const.

19 февр. 2018 г. 20:42 пользователь "T.J. Crowder" <
tj.crowder at> написал:

> On Mon, Feb 19, 2018 at 4:35 PM, Aleksander Efremov <mr.efrem at>
> wrote:
> >
> > How do you offer to check a assignment of result of `fetch` to
> > the variable (const) ? For it also exists decorator?
> I'm not sure I know what you mean. If you could provide a code example
> of what you're asking about...?
> I don't think there is any concept of a decorator on a local
> variable/constant that can intercept all assignments to it, no, if
> that's what you mean. If you literally mean `fetch`, you could
> decorate the `then` callback function, but that wouldn't help with
> `await` syntax (which I'd expect to overtake promise syntax fairly
> quickly).
> -- T.J. Crowder
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