Weak event listener

Mark S. Miller erights at google.com
Tue Mar 26 12:18:31 PDT 2013


WeakSet may or may not happen by ES6. But even if it doesn't, WeakSet is
trivially shimmable on WeakMap.

WeakRef will definitely not happen earlier than ES7. I do hope it will
happen in ES7, but this discussion has yet to happen.


On Tue, Mar 26, 2013 at 4:30 PM, Sam Tobin-Hochstadt <samth at ccs.neu.edu>wrote:

> On Tue, Mar 26, 2013 at 12:28 PM, Rick Waldron <waldron.rick at gmail.com>
> wrote:
> >
> >
> >
> > On Tue, Mar 26, 2013 at 12:23 PM, Domenic Denicola
> > <domenic at domenicdenicola.com> wrote:
> >>
> >> From: Rick Waldron [waldron.rick at gmail.com]
> >>
> >> > TC39 reached consensus on the inclusion of WeakSet, though it needs to
> >> > be designed:
> >> >
> >> >
> https://github.com/rwldrn/tc39-notes/blob/master/es6/2012-09/sept-19.md#weakset
> >>
> >> Is this ES6 timeframe, or ES7? I have run into a few use cases for it
> >> since hearing this, and was hoping it was on-track.
> >
> >
> > The discussion immediately preceding that discussion indicates that
> WeakSet
> > will be a requirement of Proxy:
> >
> >
> https://github.com/rwldrn/tc39-notes/blob/master/es6/2012-09/sept-19.md#proxy-and-private-names
>
> Note that this requirement is conditional on a particular approach
> (which I still favor) to the interaction between proxies and private
> names, and so since that's still up in the air, the WeakSet
> requirement for ES6 may go away.
>
> Sam
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>



-- 
    Cheers,
    --MarkM
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