12721 2007-02-09 15:53:21 -0800 getter/setter does not follow the behavior of Firefox 2012-03-07 18:21:24 -0800 1 1 1 Unclassified WebKit WebCore JavaScript 420+ Mac OS X 10.4 RESOLVED DUPLICATE 49739 P2 Normal --- 1 ian.eng.webkit webkit-unassigned ap barraclough bedney feng joker806 t.brain oldest_to_newest 24564 0 ian.eng.webkit 2007-02-09 15:53:21 -0800 Case: window.screen.__defineGetter__("width", function(){return "foo";}); Firefox allows defining a getter on a readonly property, WebKit ignores it. 24489 1 13106 ap 2007-02-10 10:29:12 -0800 Created attachment 13106 test case 124287 2 ap 2009-06-04 04:10:27 -0700 See also: bug 18737. 124289 3 ap 2009-06-04 04:10:37 -0700 *** Bug 26127 has been marked as a duplicate of this bug. *** 124301 4 t.brain 2009-06-04 06:52:35 -0700 (In reply to comment #3) > *** Bug 26127 has been marked as a duplicate of this bug. *** As I described under bug 26127, this isn't limited to "read-only" properties as described here, but rather getters and setters on any native DOM property. And this contradicts the behavior of Firefox, IE8 and even Chrome. 187560 5 bedney 2010-02-03 17:26:08 -0800 I've confirmed this behavior as well. Any fix to this would be most welcome! :-) Cheers, - Bill 573454 6 barraclough 2012-03-07 18:21:24 -0800 The behaviour of __defineGetter__ is correct here, we should not be able to redefine non-configurable properties. The problem is likely that these properties are directly on the instance of the object, rather than accessors on the prototype. Per WebIDL, this is a bug in our implementation. *** This bug has been marked as a duplicate of bug 49739 *** 13106 2007-02-10 10:29:12 -0800 2007-02-10 10:29:12 -0800 test case getter.html text/html 521 ap PGJvZHk+CjxzY3JpcHQ+CnRyeSB7CiAgICBkb2N1bWVudC53cml0ZSgiYXJyYXk6PGJyPiIpOwog ICAgYXJyID0gbmV3IEFycmF5OwogICAgYXJyLl9fZGVmaW5lR2V0dGVyX18oImxlbmd0aCIsIGZ1 bmN0aW9uKCl7cmV0dXJuICJmb28iO30pOwp9IGNhdGNoKGV4KSB7CiAgICBkb2N1bWVudC53cml0 ZShleCArICI8YnI+Iik7Cn0KCmRvY3VtZW50LndyaXRlKCI8YnI+Iik7Cgp0cnkgewogICAgZG9j dW1lbnQud3JpdGUoIndpbmRvdy5zY3JlZW4uLi48YnI+Iik7CiAgICB3aW5kb3cuc2NyZWVuLl9f ZGVmaW5lR2V0dGVyX18oIndpZHRoIiwgZnVuY3Rpb24oKXtyZXR1cm4gImZvbyI7fSk7CiAgICBp ZiAod2luZG93LnNjcmVlbi53aWR0aCA9PSAiZm9vIikKICAgICAgICBkb2N1bWVudC53cml0ZSgi U1VDQ0VTUyIpOwogICAgZWxzZQogICAgICAgIGRvY3VtZW50LndyaXRlKCJGQUlMVVJFIik7Cn0g Y2F0Y2goZXgpIHsKICAgIGRvY3VtZW50LndyaXRlKGV4ICsgIjxicj4iKTsKfQo8L3NjcmlwdD4K PC9ib2R5Pgo=