This is mainly for clarification purpose since I need to handle these objects in a single place.
Reading descriptors's description: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-property-descriptor-specification-type and reading how descriptors are retrieved: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-ordinarygetownproperty I wonder if it will ever happen that inherited properties will be just ignored/dropped and descriptors made safer without being able to set properties, even by accident, on the `Object.prototype` ### Rationale & Examples It looks like `getOwnPropertyDescriptor` will always return objects with own properties, making considered inheritance for descriptor not only an issue when setting them, but also when reading them. ```js Object.prototype.get = function () {}; var descriptor = Object.getOwnPropertyDescriptor( Object.prototype, 'toString' ); // resultingo into Object { value: function, writable: true, enumerable: false, configurable: true, get: function } // note the get is inherited ``` How can I tell if I should accept a property without passing through `value in object || object.hasOwnProperty('get')` and similar stuff? I'd say own properties should have priority but then why are inherited properties considered at all if these cannot be overwritten without causing potential problems? As example, that descriptor that inherits from `Object.prototype` has been retrieved via native methods, `Object.getOwnPropertyDescriptor`, and it will **fail** through native methods. Following an example: ```js Object.defineProperty(Object.prototype, 'toString', descriptor); Uncaught TypeError: Invalid property. A property cannot both have accessors and be writable or have a value, #<Object>message: "Invalid property. A property cannot both have accessors and be writable or have a value, #<Object>"stack: (...)get stack: function () { [native code] }set stack: function () { [native code] }__proto__: Error ``` Thanks for any sort of outcome. Best Regards
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
