That's new to me too. Very interesting, but mysterious. There's a lengthy discussion of it here:
https://mail.mozilla.org/pipermail/es-discuss/2009-February/008818.html -Mike On Tue, Oct 6, 2009 at 10:01 AM, 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 > > > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "jQuery Development" group. To post to this group, send email to jquery-dev@googlegroups.com To unsubscribe from this group, send email to jquery-dev+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/jquery-dev?hl=en -~----------~----~----~----~------~----~------~--~---
