- From: Jukka K. Korpela <jukka.k.korpela@kolumbus.fi>
- Date: Fri, 27 Sep 2013 23:04:26 +0300
- To: public-html@w3.org
2013-09-27 22:42, Brendan Long wrote:
> Sorry if this is a stupid question, but the use of media queries in the
> src attribute brings up an interesting question: Why don't we just let
> the src attribute be specified by CSS?
>
> <img alt="A cat" src="default-cat.jpeg" class="cat" />
>
> img.cat {
> @media (max-width: 600px) {
> src: "smaller-cat.jpeg";
> }
> @media (max-width: 400px) {
> src: "even-smaller-cat.jpeg";
> }
> }
>
That way, the approach would deviate quite a lot from the overall
structure of CSS. You don’t set element attributes in CSS, and you don’t
use @media queries inside rules. I’m not saying this would impossible,
just that it would probably be too different from design principles
applied so far.
But there’s a different approach to implementing a similar idea. Just
use @media queries as currently defined and implemented, and use CSS
code like
@media (max-width: 600px) {
img.cat { content: url(smaller-cat.jpeg) }
}
This is currently defined only in the CSS3 Generated Content Module, a
very old WD (from 2003), but this part of it has been implemented in
Opera, Safari, and Chrome.
--
Yucca, http://www.cs.tut.fi/~jkorpela/
Received on Friday, 27 September 2013 20:04:49 UTC