On Thu, 19 Feb 2009, David-Sarah Hopwood wrote: > > MarkM's point is that *given that the object called Window is > inaccessible*, there's no way to observe that the object called Window > is at the top of the scope chain.
Granted, but there _is_ a way to observe that the object at the top of the scope chain isn't the same as the object returned by |this|, which is what I am concerned about. > > When a browsing context navigates from page A to page B, the object at > > the top of the scope chain in code from page A and the oject at the > > top of the scope chain in code from page B are not the same object, > > It's not possible to observe that, since by hypothesis neither object is > accessible to ECMAScript code. The object itself isn't, but properties on the object are. If two scripts check to see what value a variable "x" on their global object is, and they get different results, in the absence of any code changing anything, one can tell that they are different global objects. > I'm confused by the motivation of the change in HTML5. It seems like it > is imposing most of the complexity that would be needed to fix some of > the security problems associated with the global object, *without* > actually fixing those problems. What security problems does in not fix? The motivation is to make HTML5 describe what browsers do. > Also, it is a breach of standards development etiquette for the HTML WG > to make a a change (even in a draft) that it believes to be incompatible > with the ECMAScript spec, without consulting TC39. It should not have > been left to you in the role of an implementor to point out the > incompatibility. I am the editor of the HTML5 spec. My e-mail was an attempt at the consultation to which you refer. HTH, -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.' _______________________________________________ Es-discuss mailing list Es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
