[Webkit-unassigned] [Bug 80028] New: Setting crossOrigin attribute for images won't trigger onerror on CORS denial

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=80028

           Summary: Setting crossOrigin attribute for images won't trigger
                    onerror on CORS denial
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows Vista
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: niklasvh at gmail.com


Created an attachment (id=129704)
 --> (https://bugs.webkit.org/attachment.cgi?id=129704&action=review)
example where onerror / onload isn't triggered

When defining the crossOrigin attribute for an Image element, it won't return an onload/onerror event if the image exists, but denied by CORS policy. In other words, there is no event to determine when the image has finished loading and whether it managed to load it, unless you check with timers for the complete attribute to change. 

The expected result would be for the onerror event of the image to be triggered (as it does in Firefox), and as defined in http://www.whatwg.org/specs/web-apps/current-work/multipage/embedded-content-1.html#attr-img-crossorigin "Set the img element to the broken state, and fire a simple event named error at the img element."

Tested on both 19.0.1057.0 canary and 17.0.963.56 m, and neither is triggering the real onerror in the example.

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