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Re: [DOM Level 3 Events] optionality of the capture argument in addEventListener/removeEventListener

From: Olli Pettay <Olli.Pettay@helsinki.fi>
Date: Wed, 29 Sep 2010 20:04:00 +0300
Message-ID: <4CA37180.9010507@helsinki.fi>
To: Jonas Sicking <jonas@sicking.cc>
CC: Sergey Ilinsky <sergey@ilinsky.com>, www-dom@w3.org
On 09/24/2010 11:48 PM, Jonas Sicking wrote:
> On Fri, Sep 24, 2010 at 12:17 PM, Sergey Ilinsky<sergey@ilinsky.com>  wrote:
>> There are modern browsers that made 3rd argument in the
>> addEventListener/removeEventListener be optional. Is this a legal step?
>> If I understand correctly, specification requires 3rd argument to be passed,
>> thus the new behaviour not backed by the change
>> in specification only destabilizes web as a platform.
>> Personally, I like the behaviour, but cannot use it as long as not every
>> browser does that.
> Currently it does not appear to be legal based on my reading of the
> latest editor drafts. However I would love to change that. It wouldn't
> be a big change in the spec, just stick [optional] in front of the
> useCapture argument, and it should be no problem as far as backwards
> compatibility goes. And at least in gecko it would be trivial to
> implement.
> The only problem I can think of is that it means that people might
> write pages that only works in newer browsers, however that is true
> for any new feature added.
> / Jonas

I don't support this kind of change.
It happens way too often that people don't think about the phase, and 
that leads to bugs.

Received on Wednesday, 29 September 2010 17:04:36 UTC

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