how to unsubscribe for an observable

Question

I have an angular application where I am reading a file and processing it and this processing is part of observable. I have a service which returns the observable an (ngbus

Answer 1

You must unsubscribe from the subscription, not the observable:

processItems() {
    const ngbusy = this.myservice.observable.subscribe(items => {
        // perform some business logic 


        // unsubscribe at some point...
        ngbusy.unsubscribe();
    });

    // this will unsubscribe immediately...
    ngbusy.unsubscribe();

}