- From: Simon Pieters <simonp@opera.com>
- Date: Mon, 13 Apr 2015 23:50:48 +0200
- To: www-style@w3.org, "Boris Zbarsky" <bzbarsky@mit.edu>
On Mon, 13 Apr 2015 23:26:41 +0200, Boris Zbarsky <bzbarsky@mit.edu> wrote:
> On 4/13/15 5:13 PM, Simon Pieters wrote:
>> Yeah, it should be null to match scrollTop's behavior. This was an
>> oversight.
>>
>> https://github.com/w3c/csswg-drafts/commit/ad098d66cfc02a4952e8af2eeea742c520d10c2b
>
> So what _is_ scrollTop's behavior, exactly? Consider this testcase
> (quirks mode):
>
> <html>
> <body style="display: none">
> </body>
> <script>
> var body = document.createElement("body");
> document.documentElement.appendChild(body);
> var div = document.createElement("div");
> div.style.height = "5000px";
> body.appendChild(div);
> </script>
> </html>
>
>
> scroll down and check document.body.scrollTop.
>
> I believe the current spec says that this should return window.scrollY
> (because the element in question is the body element and does not have a
> scrolling box), but in Firefox it does not (because it doesn't have a
> box at all).
Do you think we should change the spec? I'd be OK to match Firefox for
this case.
> In IE11, .scrollTop on _both_ of the <body> elements in that testcase
> returns the scroll position. So does
> document.documentElement.scrollTop...
This seems a bit weird. :-)
--
Simon Pieters
Opera Software
Received on Monday, 13 April 2015 21:51:18 UTC