subject

A BehaviorSubject holds one value. When it is subscribed it emits the value immediately. A Subject doesn’t hold a value. Subject example (with RxJS 5 API): const subject = new Rx.Subject(); subject.next(1); subject.subscribe(x => console.log(x)); Console output will be empty BehaviorSubject example: const subject = new Rx.BehaviorSubject(0); subject.next(1); subject.subscribe(x => console.log(x)); Console output: 1 In … Read more