Rx.Observable.timer(dueTime, [period], [scheduler])
Returns an observable sequence that produces a value after dueTime has elapsed and then after each period. Note for rx.lite.js, only
relative time is supported.
Arguments
dueTime(Date|Number): Absolute (specified as a Date object) or relative time (specified as an integer denoting milliseconds) at which to produce the first value.[period|scheduler=Rx.Scheduler.timeout](Number|Scheduler): Period to produce subsequent values (specified as an integer denoting milliseconds), or the scheduler to run the timer on. If not specified, the resulting timer is not recurring.[scheduler=Rx.Scheduler.timeout](Scheduler): Scheduler to run the timer on. If not specified, the timeout scheduler is used.
Returns
(Observable): An observable sequence that produces a value after due time has elapsed and then each period.