The spec states:
The IDL attribute `complete` must return true if […]The final task that
is queued by the networking task source once the resource has been
fetched has been queued, but has not yet been run, and the img element
is not in the broken state.
The img element is completely available.
http://www.whatwg.org/specs/web-apps/current-work/multipage/embedded-content-1.html#dom-img-complete
If I understand correctly the spec calls for Image.complete to be false
when the image is broken — and this doesn't match implementations. At
least Firefox, Chrome and Safari set image.complete == true when the image
is broken. Test case:
<img src="data:image/gif,broken" onerror="alert(this.complete)">
Having complete == true set on broken images is actually useful: it allows
distinguishing between images that haven't been loaded yet and images that
have been loaded and failed to decode (.complete == true && .naturalWidth
== 0).
--
regards, Kornel
