[whatwg] Image.complete in broken state
Kornel Lesiński
kornel at geekhood.net
Wed Oct 30 15:49:32 PDT 2013
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
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