- From: Anselm Hannemann <info@anselm-hannemann.com>
- Date: Tue, 12 Nov 2013 19:44:51 +0100
- To: "Tab Atkins Jr." <jackalmage@gmail.com>
- Cc: Markus Ernst <derernst@gmx.ch>, Ryosuke Niwa <rniwa@apple.com>, whatwg <whatwg@lists.whatwg.org>, Markus Lanthaler <markus.lanthaler@gmx.net>, "Jukka K. Korpela" <jkorpela@cs.tut.fi>, Adam Barth <w3c@adambarth.com>
Really? An empty div element? What about accessibility or When CSS cannot be loaded? What if only html is grabbed by another page? It doesn't seem to be a really solid solution in my opinion.
----
Anselm
> On 12 Nov 2013, at 19:40, "Tab Atkins Jr." <jackalmage@gmail.com> wrote:
>
>> On Tue, Nov 12, 2013 at 9:50 AM, Adam Barth <w3c@adambarth.com> wrote:
>> We might even be able to make this work without inventing anything:
>>
>> <style type="text/css">
>> @media (min-width: 480px) {
>> .artdirected {
>> width: 30px;
>> height: 30px;
>> background-image: image-set(url(small.png) 1x, url(small-hires.png) 2x);
>> }
>> }
>> @media (min-width: 600px) {
>> .artdirected {
>> width: 60px;
>> height: 60px;
>> background-image: image-set(url(large.png) 1x, url(large-hires.png) 2x);
>> }
>> }
>> </style>
>> <div class="artdirected"></div>
>>
>> All the information is there. We just need to teach the preload
>> scanner to parse a subset of CSS and match a subset of selectors. If
>> you stay within the "preloadable" subset, then your images will be
>> loaded by the preload scanner. Otherwise, they'll just be loaded
>> normally.
>>
>> What's most attractive to me about this approach is that it doesn't
>> require inventing anything new, which means the compatibility story
>> for older user agents is solid. You don't need a polyfill or anything
>> like that.
>
> If you legitimately think this will work, I'm for it. If you just
> think it's a vague "maybe", I'd like to continue pursuing new syntax.
>
> (If we do this, we just need to port the variable-sized-image stuff
> into image-set(). It wouldn't be hard.)
>
> ~TJ
Received on Tuesday, 12 November 2013 18:45:20 UTC