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    ReplaySubject: remembering events from the past

    rxjsRxJS
    ^5.0.0

    A BehaviorSubject can remember the latest value emitted, but what if we wanted Observer B to see all the previous values emitted in the past? We can't do that with BehaviorSubject, but there is ReplaySubject, which allows us to do that. This lessons teaches you everything you need to know about ReplaySubjects.