On Wed, May 16, 2012 at 8:37 AM, Odin Hørthe Omdal <odi...@opera.com> wrote: > Andy Davies <dajdav...@gmail.com> wrote: >> >> Looking at the srcset proposal it appears to be recreating aspects of >> media-queries in a terse less obvious form... >> >> We've already got media queries so surelt we should be using them to >> determine which image should be used and if media-queries don't have >> features we need then we should be extending them... > > > Ah! What a truly great question, so simple. > > The answer is: no, it is not media-queries although they look like it. A > big problem is that it's so easy to explain it by saying "it's just like > media-query max-width", rather than finding the words to illustrate that > they are totally different. > > The *limited effect* also feels similar which doesn't help the case at > all. > > So, even though I have a rather bad track record of explaining any > thing, I'll try again: > > Media queries come from the client side. They allow the author of a web > page to tell exactly how she want to lay out her design based on the > different queries. The browser *HAS* to follow these queries. And also, > I don't think (please correct me if wrong) the media query can be subset > to only the stuff that's really meaningful to do at prefetch-time. > > The srcset proposal, on the other hand, are purely HINTS to the browser > engine about the resources. They are only declarative hints that can be > leveraged in a secret sauce way (like Bruce said in another mail) to > always optimize image fetching and other features. If you make a new > kind of browser (like e.g. Opera mini) it can have its own heuristics > that make sense *for that single browser* without asking _anyone_. > Without relying on web authors doing the correct thing, or changing > anything or even announce to anyone what they are doing. It's opening up > for innovation, good algorithms and smart uses in the future. > > > That's the basic difference, totally different. :-)
If that's the case, would it make sense to get rid of the @media attribute on <source> elements in <video> and replace it with @srcset? Silvia.
