can support Boolean ?

[chaiizii]

[victos]

I don't think so. And I think there's a same way to reach the same goal.

# the code below just like "showBusy = true;"
subject:Subject<any> = new Subject();
subscription:Subscription = subject.subscribe(() => {});
# the code below just like "showBusy=false;"
subject.complete();

just a little bit complex , right?