[whatwg] Implementation complexity with elements vs an attribute (responsive images)

[Boris Zbarsky]

On 5/12/12 9:28 AM, Mathew Marquis wrote:
> While that information may be available at the time the img tag is parsed, I don’t believe it will be available at the time of prefetching

Which information?

At least in Gecko, prefetching happens "when the tag is parsed".

So in fact in Gecko the srcset approach would be much more amenable to 
prefetching than the <picture> approach.

-Boris