On 27 November 2014 at 15:58, Andrea Giammarchi <[email protected]> wrote: > On Thu, Nov 27, 2014 at 2:44 PM, Andreas Rossberg <[email protected]> > wrote: >> Well, there is no functionally correct polyfill for WeakMaps that is >> actually weak, regardless of .clear. > > Please bear with me so I understand your point: if you have `o1` and `o2` > and `o1.link = o2;`, wouldn't `o2` be "free" once `o1` is not referenced > anymore ?
Yes, but this approach only works for regular, extensible, writable objects o1, i.e., fails for frozen or sealed objects, proxies, etc. And of course, as a polyfill for weak maps, it breaks other things, such as correctly iterating over properties of an object used as a key. /Andreas _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
