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Re: [CSS2.1] Background boundaries and attachment

From: Ian Hickson <ian@hixie.ch>
Date: Mon, 16 Feb 2004 14:45:36 +0000 (UTC)
To: fantasai <fantasai@escape.com>
Cc: www-style@w3.org
Message-ID: <Pine.LNX.4.58.0402161436370.2210@dhalsim.dreamhost.com>

On Wed, 28 Jan 2004, fantasai wrote:
>>> background-attachment: fixed;    /* fixed wrt viewport, which has the
>>>                                     effect of being
>>>                                     fixed wrt the border when the parent scrollbox
>>>                                     isn't being scrolled -- which covers frames behavior*/
>>> background-attachment: attached; /* hypothetical CSS3 property: fixed
>>>                                     wrt border */
>> background-attachment: fixed; /* fixed wrt viewport */
>> background-attachment: scroll; /* fixed to element */
>> background-attachment: content; /* fixed to content */
>> I don't understand why one is better or worse than the other. I seem to
>> recall the decision to define it the way it is was more based on the
>> weight of existing implementations at the time than preferences either way
>> on the issue, since the two options are pretty much symmetric.
> Having the 'scroll' keyword mean fixed-to-content would, I believe, be
> more consistent with authors' expectations because fixed-to-content is
> the behavior you get when you specify 'scroll' on the main canvas -- or
> on any non-scrolling block. In these (most common) cases, 'scroll' _most
> notably_ causes the text and the background scroll together in all
> implementations. If you define it to mean fixed-to-element, then this
> interpretation breaks on scrolling elements. /That/ is the problem.

I understand what you are saying. However, I don't see it as very
important, especially given that the group's investigations suggested that
on the whole the opposite effect is more commonly implemented in UAs that
have faced the problem.

Ian Hickson                                      )\._.,--....,'``.    fL
U+1047E                                         /,   _.. \   _\  ;`._ ,.
http://index.hixie.ch/                         `._.-(,_..'--(,_..'`-.;.'
Received on Monday, 16 February 2004 09:45:38 UTC

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