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[whatwg] Questions on error handling in web workers

From: Ian Hickson <ian@hixie.ch>
Date: Thu, 16 Jul 2009 00:17:22 +0000 (UTC)
Message-ID: <Pine.LNX.4.62.0907160016100.12284@hixie.dreamhostps.com>
On Wed, 15 Jul 2009, Jian Li wrote:
>
> I have a couple questions regarding error handling in HTML 5 workers. In 
> the spec, it says "Whenever a runtime script error occurs in one of the 
> worker's scripts, if the error did not occur while handling a previous 
> script error, the user agent must report the error using the 
> WorkerGlobalScope object's onerror attribute.". Does it mean that 
> onerror attribute of WorkerContext would be called? In addition to the 
> errors being thrown?

The term "report the error" is defined here:

   http://www.whatwg.org/specs/web-apps/current-work/#report-the-error


> The spec also says "For dedicated workers, if the error is still not 
> handled afterwards, or if the error occurred while handling a previous 
> script error, the user agent must queue a task to fire a worker error 
> event at the Worker object associated with the worker.".  What does it 
> mean by "the error is still not handled afterwards"? Does it mean that 
> the onerror attribute is not set for WorkerContext?

The term "not handled" is defined here:

   http://www.whatwg.org/specs/web-apps/current-work/#concept-error-nothandled

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Wednesday, 15 July 2009 17:17:22 UTC

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