Bugzilla – Bug 20176
Syntax only supports 'mobile first'
Last modified: 2013-01-21 17:49:50 UTC
The img@srcset does not afford developers the ability to define the breakpoints for images as either minimum values (mobile first) or maximum values (desktop first) to match the media queries used in their design.
See: “Secret src” http://adactio.com/journal/5474/
Commenting per the HTML WG’s request:
This bug would be addressed by the proposed `picture` extension specification: See: http://picture.responsiveimages.org/#relationship-to-srcset
Further discussion is available in the WHATWG clone of this bug: https://www.w3.org/Bugs/Public/show_bug.cgi?id=20212