Save Object.observe()! (please) + make WeakMap/WeakSet observable.

[Brendan Eich]

I did watchpoints in SpiderMonkey in 1997 IIRC, implemented as replacement
accessors under the hood. ES5 and unfrozen ordinary objects allow
self-hosting of watchpoints (ES6 weakmaps and symbols help but are not
required).

We can't standardize watchpoints for all objects, of course.

/be

On Thu, Nov 5, 2015 at 11:49 AM Benoit Marchant <marchant at mac.com> wrote:

> Proxy at the granularity of a property would be perfect for that
>
> On Nov 5, 2015, at 10:11, Matthew Robb <matthewwrobb at gmail.com> wrote:
>
>
> On Thu, Nov 5, 2015 at 12:49 PM, Tom Van Cutsem <tomvc.be at gmail.com>
> wrote:
>
>> O.o is a much safer alternative to Proxy.startTrapping and covers at
>> least part of its use cases.
>
>
> ​Hmm.
>
> Okay so pretend all object's are really just proxies to whatever their
> internal backing might be. In this scenario perhaps what we might want is
> `Proxy.observeTraps` which should work just like Object.observe only
> synchronously and without a baked in ability to intercede. One could,
> however, respond to a set operation by resetting the old value. What this
> does is give you something VERY close to a built in observable Model type
> on top of plain objects.
>
>
>
> - Matthew Robb
>
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