On Jul 17, 2013, at 16:48 , Jonas Sicking <[email protected]> wrote: > On Wed, Jul 17, 2013 at 4:36 PM, Jonas Sicking <[email protected]> wrote: >> >> I'm still confused as to when it's correct for an API to return a Date >> object. >> >> At least in SpiderMonkey it's impossible to create Date objects that >> represent a timezone other than the user's current timezone. I.e. >> getTimezoneOffset returns the same value for all object instances. >> Maybe that's a limitation that's implementation specific and is there >> because no current JS APIs happen to need it? >> >> But that makes it impossible to create, for example a Calendar API >> which returns a Date object which represents the time and timezone of >> when a particular event is going to happen. >> >> So at least in SpiderMonkey a Date object is not a time+timezone, but >> rather simply a timestamp whose API always represents that timestamp >> in a particular (but possibly changing) timezone. >> >> Is this simply a SpiderMonkey bug? Do we expect JS code to be able to >> handle Date objects representing timezones other than the user's >> current timezone? >> >> Another question is if it's wrong of the Task Scheduler API [1] to use >> Date objects in the ScheduledTask [2] API since the time that a task >> is scheduled sometimes represents a point-in-time rather than a >> particular time+timezone >> >> [1] http://www.w3.org/2012/sysapps/web-alarms/ >> [2] http://www.w3.org/2012/sysapps/web-alarms/#interface-scheduledtask >> >> / Jonas > > And then there is the thread started at [3], and this particular email > [4] which seems to conclude that Date objects in fact are just > timestamps, and not timezone+timestamp. > > [3] https://mail.mozilla.org/pipermail/es-discuss/2013-February/028847.html > [4] https://mail.mozilla.org/pipermail/es-discuss/2013-February/028857.html
And then there was this thread, which ended with your largely correct idea for how to implement floating time alarms: http://lists.w3.org/Archives/Public/public-script-coord/2013AprJun/thread.html#msg452 http://lists.w3.org/Archives/Public/public-script-coord/2013AprJun/0479.html Norbert _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
