[whatwg] "complete" DOM attribute (image elements)

[Boris Zbarsky]

Gavin Sharp wrote:
> I don't actually recall what I was referring to in that message, but 
> observing the images affect on layout seems to work pretty well:
> 
> https://people.mozilla.com/~gavin/detect-image.html

A site that cared about that could send image types for its image 404s, 
no?  Or does the spec require those to not be shown?

-Boris