Yes, only own properties are taken into account. I think there might be some open issues related to __proto__ depending on whether it ends up being an accessor or magic data property in the end. On Aug 17, 2012 6:04 AM, "Andrea Giammarchi" <[email protected]> wrote:
> As far as I can tell, Object.observe(obj) create a notifier in the obj > itself which means, after that, if you Object.prototype.whatever = 123; the > obj notifier *won't* fire since it's not its own property and I do hope > this works with own properties only otherwise not only we can have > hijacking attacks but tremendous performance impact ( if a notifier has to > automatically create a notifier up to the proto chain until the null > prototype ... a non-sense, imho ) > > On Fri, Aug 17, 2012 at 11:01 AM, gaz Heyes <[email protected]> wrote: > >> On 17 August 2012 10:57, Andrea Giammarchi >> <[email protected]>wrote: >> >>> the Notifier is lazily instantiated and I believe not enumerable so >>> JSON.stringify should ever expose this property. >>> >>> Moreover, it does not look like there is a {}.__notifier__ property >>> anywhere, Object.getNotifier(obj) is required indeed so a WeakMap that >>> relates the obj, and its notifier, cannot be serialized in a meaningful way >>> via JSON.stringify neither. >>> >> >> Ah no I wasn't talking about the JSON object but remotely hacking JSON >> feeds themselves using external scripts and hijacking the Object prototype >> with Observe. >> > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
