[whatwg] srcset isn't future-friendly to screen size differences

Simon Pieters simonp at opera.com
Fri Sep 7 02:35:09 PDT 2012

On Fri, 07 Sep 2012 06:07:30 +0200, Fred Andrews <fredandw at live.com> wrote:

>> From: jackalmage at gmail.com
> ...
>> I'm not sure how best to solve this, but John Mellor suggested
>> allowing the specification of the image's native dimensions somehow.
>> That way, the browser could know that the 1600.jpg image is
>> appropriate to serve as an 800px wide high-dpi image, or a 1600px wide
>> low-dpi image.
> John has a proposal here:  
> http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2012-August/036958.html   
> e.g. '<img srcset="320x120, 320.jpg 1x, 640.jpg 2x, 1280.jpg 4x,  
> 2560.jpg 8x">' . As I understand it John's proposal only declares the  
> image sizes and is not intended for making a selection based on density  
> or screen size directly?

If what's necessary here is to declare the intrinsic dimensions, why not  
use the width="" and height="" attributes for this? (They can be  
overridden with CSS if you want e.g. 100% width.)

Simon Pieters
Opera Software

More information about the whatwg mailing list