Thanks for the reply Allen, I was under the impression that inherited properties can be overridden, regardless of their write-ability on the __proto__.
Also as far as I understand freeze will make properties including constructor non-confugurable, will I still be able to override such properties using Object.defineProperty ? Also this was simplified example and it's not really possible to do the freeze after. Will try `Object.defineProprety` though. Thanks -- Irakli Gozalishvili Web: http://www.jeditoolkit.com/ Address: 29 Rue Saint-Georges, 75009 Paris, France <http://goo.gl/maps/3CHu> On Thu, Feb 17, 2011 at 02:21, Allen Wirfs-Brock <[email protected]>wrote: > The error looks correct to me. By freezing Type.proto you make all its own > properties "read only". One of those is the constructor that is > automatically created on every func.prototype object. When you assign to > object.constructor you are trying to over-ride an inherited read-onoy > property. ECMAScript has never allowed this. You can say: > Object.defineProperty(object,"constructor",{value: function Foo() {}, > /* any other attributes you want to set */}); > to over-ride the inherited constructor property. > Or you can restructure you code so you do the freeze after you do the > assignment. > > On Feb 16, 2011, at 5:09 PM, Irakli Gozalishvili wrote: > > Hi, > > I've run into one issue and even after reading ES5 specs several times it's > not clear to me what should be an expected behavior: > > Currently on Firefox nightly following code: > > (function() { > "use strict"; > > function Type() {} > Object.freeze(Type.prototype); > var object = Object.create(Type.prototype); > object.constructor = function Foo() {}; > > return object > })(); > > throws TypeError: object.constructor is read-only > while on chrome > > it returns object with constructor Foo > > I would like to know what is an expected behavior to fill a bug to an > appropriate project. > > > Thanks! > -- > Irakli Gozalishvili > Web: http://www.jeditoolkit.com/ > Address: 29 Rue Saint-Georges, 75009 Paris, France<http://goo.gl/maps/3CHu> > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > >
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