Le 13/11/2014 17:29, Boris Zbarsky a écrit :
On 11/13/14, 6:44 AM, Andreas Rossberg wrote:
Well, the actual diabolic beast and universal foot gun in this example
is setPrototypeOf. ;)
Note that there is at least some discussion within Mozilla about
trying to make the prototype of Object.prototype immutable (such that
Object.getPrototypeOf(Object.prototype) is guaranteed to always return
the same thing, modulo someone overriding Object.getPrototypeOf),
along with a few other things along those lines. See
<https://bugzilla.mozilla.org/show_bug.cgi?id=1052139>.
This would result in objects which [[Prototype]] cannot be changed but
which properties can be changed.
This is not possible per ES6 semantics I believe unless the object is a
proxy (which setPrototypeOf trap throws unconditionally and forwards the
rest to the target). Is it a satisfactory explanation? Should new
primitives be added?
Whether this is web-compatible, we'll see.
I guess my above questions can wait the answer to this part.
David
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