[whatwg] Example wrong in web workers

[Drew Wilson]

FWIW, I've usually looked at self.postMessage when trying to determine
whether running in dedicated or shared worker context, although Anne's
suggestion (using "in") is better.

-atw

On Mon, Oct 26, 2009 at 7:00 AM, Anne van Kesteren <annevk at opera.com> wrote:

> On Mon, 26 Oct 2009 13:57:10 +0100, Simon Pieters <simonp at opera.com>
> wrote:
>
>> Web Workers has the following in some example (twice):
>>
>> // support being used as a shared worker as well as a dedicated worker
>> if (this.onmessage) // dedicated worker
>>   ....
>>
>> This ought to be doing something like (typeof this.onmessage !=
>> 'undefined') , as the event property is presumably 'null' by the time of the
>> test.
>>
>
> ("onmessage" in this) might be somewhat safer fwiw.
>
>
> --
> Anne van Kesteren
> http://annevankesteren.nl/
>
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