I agree it shouldn't, this is why I call it a stopgap measure. Beyond the fact we both dislike extra markup I do find this solution cleaner than picturefill how

I agree it shouldn't, this is why I call it a stopgap measure. Beyond the fact we both dislike extra markup I do find this solution cleaner than picturefill however, at least there are no extra divs inside the markup itself just a data attribute.