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Posted by Jukka K. Korpela on 02/27/06 00:07
Harlan Messinger <hmessinger.removethis@comcast.net> wrote:
> But the user may have a stylesheet with
>
> STRONG { background-color: red ! important; }
>
> though I doubt it.
Well, it's a poorly written style sheet since it does not specify
color. We cannot protect against such style sheets. We can and should
protect against clashes with technically well-designed user style
sheets, such as
STRONG { background-color: red ! important; color: white ! important; }
(which would not result in a problem in this case) _or_ the same
without the !important specifiers.
> However, in your scenario, you could use the
> selector
>
> div#content STRONG
>
> instead. The user's stylesheet is highly unlikely to have anything
> applicable that's of higher specificity than that.
Specificity isn't all. A user style sheet can trump all rules in an
author style sheet, even using the least specific selector *:
* { color: white !important; background: black !important; }
In this case, problems would arise if the user style sheet had
div { color: white !important; background: red !important; }
But things really get _more difficult_ when people try to avoid
declaring colors and backgrounds together. I can understand some
reasons to such reluctance, but there's really no other way to write
robust style sheets.
--
Yucca, http://www.cs.tut.fi/~jkorpela/
Pages about Web authoring: http://www.cs.tut.fi/~jkorpela/www.html
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