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Rxjs - Coggle Diagram

- - - - const observer1 = subject.subscribe(...)
        
        subscription is the same as Observable
      - subject.next(....)
        
        emit value: any
  - - - const observer2 = subject.subscribe(...)
        
        receives last emitted value from subject
      - const subject = new BehaviorSubject()
    - - const subject = new ReplaySubject(amount, millitime)
      - const observer2 = subject.subscribe(...)
        
        receives specified amount of emitted value within specified time in milliseconds
    - - const subject = new AsyncSubject()
        
        Note: subject.complete()
      - const observer2 = subject.subscribe(...)
        
        receives last emitted value after subject is completed
- - - - observers.subscribe(...)
        
        receives values of both observers
  - - - observer1.add( observer2 )
        
        observer1.unsubscribe()
        
        observer1 and observer2 will unsubscribe together
      - observer1.add(() => {...})
        
        do other thing when unsubscribe