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Re: timeStamp and DOMTimeStamp

From: Ian Hickson <ian@hixie.ch>
Date: Tue, 28 Mar 2006 04:22:46 +0000 (UTC)
To: Bjoern Hoehrmann <derhoermi@gmx.net>
Cc: public-webapi@w3.org
Message-ID: <Pine.LNX.4.62.0603280418070.315@dhalsim.dreamhost.com>

On Tue, 28 Mar 2006, Bjoern Hoehrmann wrote:
>
> * Ian Hickson wrote:
> >I propose we define DOMTimeStamp in ECMAScript as being a Number giving 
> >the number of milliseconds, excluding those in leap seconds, since 
> >1970-01-01T00:00:00.0Z.
> 
> While the current text isn't particularily clear, my reading is that 
> implementations should determine some "epoch" time and set the time- 
> Stamp relative to it for all events. This may but need not be the time 
> you suggest, the system start time is given as another example.
> 
> I think this is sensible since the implementation does not necessarily 
> have access to the current time or might not want to make it available 
> to applications due to security concerns. When applications do have 
> access to this information, they can easily derive it from a timeStamp 
> by comparing two of them with a given time.

Well I don't really mind what esoteric implementations might do, but, as 
discussed on today's telecon, for Web browsers we want interoperability.


> Is there a specific reason why you think this should be relative to this 
> specific time?

Time stamps should be of comparable magnitude with comparable deltas 
across different Web browsers, IMHO. Every difference between browsers 
introduces a new possibility for a Web page bug. Web authors manage to 
find plenty of ways to shoot themselves in the foot already, there's no 
reason for us to give them even more ways.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Tuesday, 28 March 2006 04:22:53 GMT

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