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

[Gavin Sharp]

Boris Zbarsky wrote:
> Ian Hickson wrote:
>> On Sun, 2 Sep 2007, Gavin Sharp wrote:
>>> It appears this behavior was explicitly chosen in Mozilla, in bug 
>>> 190561 (https://bugzilla.mozilla.org/show_bug.cgi?id=190561). I 
>>> think the arguments given in that bug might merit reconsideration; 
>>> detection of image existence is currently possible by other means
>
> How, exactly? 

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

There are also timing attacks, I suppose, but those aren't quite as 
reliable...

Gavin