On May 5, 2014, at 10:40 AM, John Barton wrote:
> I'm hoping someone can explain this result which surprises me.
>
> If I create an object with a Proxy-ed prototype, the resulting object does
> not obey .__proto__ equal Object.getPrototypeOf().
>
> For example:
> var aPrototype = {foo: 'foo'};
> var handler = {
> get: function(target, name, receiver) {
> console.log(' (Proxy handler \'get\' called for name = ' + name +
> ')');
> return target[name];
the above line needs to be:
return Reflect.get(target, name, receiver);
Object.prototype.__proto__ is an accessor property and to work correctly it
needs to have the originally accessed object passed at the this value. That's
why 'get' handlers (and others) have a 'receiver' argument.
> }
> };
> var aProxy = Proxy(aPrototype, handler);
> var hasProxyAsProto = Object.create(aProxy);
>
> At this point, I expected
> hasProxyAsProto.__proto__ === aProxy
> but it it not true. Moreover, the operation
> hasProxyAsProto.__proto__
> calls the Proxy handler get function with name === '__proto__': that makes no
> sense as hasProxyAsProto is not a Proxy.
>
> I tried this on Firefox 29 and Chrome 36. Complete example is here:
> https://gist.github.com/johnjbarton/f8a837104f0292fa088c
I can't speak to the correctness of those implementations but you need to have
change for it to even have a chance of working.
Allen
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