David,
the explanation you give of this fact make sense and is the more
plausible one. I have had others giving me that same bit of
information.

Unfortunately that's only our guess up to now, I haven't disassembled
their DLL (not yet) ! ;-)

--
Diego


On 6 Ott, 19:01, David Flanagan <da...@davidflanagan.com> wrote:
> Klaus Hartl wrote:
> > Hi all, in IE8
>
> > window === window.top
>
> > is false, whereas
>
> > window == window.top
>
> This may already be common knowledge, but it is new to me....
>
> HTML5 mandates that window.top, window.parent, etc. all be WindowProxy
> objects rather than true Window objects.  A WindowProxy acts just like a
> Window object because all of its properties are proxied directly to a
> Window.  A Window and a WindowProxy are not the same object, however,
> and so they are not === to each other.  I'm a little surprised that they
> are actually == to each other in IE8, but maybe that's the way all the
> browser vendors will do it.
>
> One fix to the code would be to use == instead of ===.  Another, I
> suppose might be to test something like:
>
>    window.top.document === window.document
>
> (The DOM isn't ready when this code is executed, but the document object
> exists, doesn't it?)
>
> I haven't seen an explanation of why the WindowProxy is necessary,
> though I suppose that something must exist in the HTML 5 mailing lists.
>   I'd love to understand this, if anyone has pointers.
>
>         David
>
> > evaluates to true. Because of this the ready event will always rely on
> > document's onreadystatechange event instead of using Diego Perini's
> > doScroll trick, see line 833 in event.js. I assume his trick is better
> > in terms if "earliness".
>
> > Can somebody please confirm this? Or is it that we want to rely on the
> > event in IE8?
>
> > --Klaus
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