Pause, upon resume give last paused value

Question

I have a hot Observable fed by a socket. I can use the pausable to pause the socket feed. But once I \'unpause\' the observable, I need to display the last valu

Answer 1

You don't even need pausable to do this. (Note as well that you tagged RxJS5 but pausable only exists in RxJS 4). You simply need to convert your pauser into a higher order Observable:

var source = Rx.Observable.fromEvent(document, 'mousemove')
  // Always preserves the last value sent from the source so that
  // new subscribers can receive it.
  .publishReplay(1);

pauser
  // Close old streams (also called flatMapLatest)
  .switchMap(active => 
    // If the stream is active return the source
    // Otherwise return an empty Observable.
    Rx.Observable.if(() => active, source, Rx.Observable.empty())
  )
  .subscribe(/**/)

//Make the stream go live
source.connect();