W3C home > Mailing lists > Public > public-media-capture@w3.org > March 2012

Re: PROPOSAL: Use events instead of callbacks

From: Rich Tibbett <richt@opera.com>
Date: Mon, 12 Mar 2012 15:11:49 +0100
Message-ID: <4F5E0425.4020207@opera.com>
To: Anant Narayanan <anant@mozilla.com>
CC: public-media-capture@w3.org
Anant Narayanan wrote:
> On 3/8/2012 3:21 AM, Rich Tibbett wrote:
>> Either an API is mature enough for release or it's not. CSS vendor
>> prefixes is a lesson learned. We don't want to see a repeat of this
>> practice.
> I hope having getUserMedia already implemented without a prefix in your
> builds won't mean we can't change the specification; as I suspect we are
> close, but not done.

We will support the standard. If the standard changes then the 
implementation will adapt accordingly.

Non-prefixing is a response to web silos and browser fragmentation that 
promotes less than optimal web development practices that leads to 
inconsistent user experiences. All of these things are bad for the web, 
UAs, developers and users.

In the link I attached to my initial reply, Paul Irish argues that 
non-prefixing does not hamper implementer maneuverability [1] and we 
agree with that sentiment. A lot of features would be in a lot better 
state if we hadn't prefixed them in final browser builds.

We've successfully tweaked our implementation a number of times over the 
last few months with getUserMedia (e.g. moving from string based options 
to object based options) without any significant problems. We expect to 
have to make more tweaks in the future.

Opera run a number of programs designed to fix incompatibilities between 
implementations. The least successful of these is reactive developer 
evangelism which is where vendor-prefixing leads all browser vendors 
eventually. The most successful approach is simply making provisions for 
API incompatibilities in our browser.js [2] as we go while maintaining a 
single consistent entry point for developers to use these APIs now and 
in the future.

It would be a lot better if we collectively release un-prefixed 
implementations while simultaneously creating a defacto cross-browser 
test suite that can be used to check and maintain consistency between 
different implementations rather than promoting silo-based development.

I could argue that had we prefixed we have locked a number of very cool 
very early demos in to an opera prefix. We decided not to do that.

- Rich

[1] http://paulirish.com/2012/vendor-prefixes-are-not-developer-friendly/

[2] http://www.opera.com/docs/browserjs/
Received on Monday, 12 March 2012 14:12:28 UTC

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