[Bug 22058] New: "error" event should fire before final readystatechange event

https://www.w3.org/Bugs/Public/show_bug.cgi?id=22058

            Bug ID: 22058
           Summary: "error" event should fire before final
                    readystatechange event
    Classification: Unclassified
           Product: WebAppsWG
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: XHR
          Assignee: annevk@annevk.nl
          Reporter: hallvord@opera.com
        QA Contact: public-webapps-bugzilla@w3.org
                CC: mike@w3.org, public-webapps@w3.org

#request-error part of spec:

Step 6: Fire an event named readystatechange. 

.
.

Step 9: Fire a progress event named event. // this fires the actual 'error'
event

This seems to be an order of events that isn't really user-friendly. 

Given a typical XHR-using script has logic like this:

if readystatechange fires with readyState === 4
  report "success", handle response data

if error event fires
  report failure

this typical XHR user would end up running the "success" code first, then the
"failure" code. This seems less than ideal.. Is there any reason we can't move
the "fire error" step to before the "fire readystatechange" step?

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Received on Thursday, 16 May 2013 09:42:05 UTC