Angular · Middle · Question 54 of 75

How does `ReplaySubject(3)` differ from `BehaviorSubject`?

✓Correct answer: It replays the last 3 values to new subscribers and needs no initial value
2It emits each value 3 times
3It completes after 3 values

Explanation

BehaviorSubject always has a current value (one) and requires an initial value. ReplaySubject buffers a configurable number of values.

Further reading

RxJS: Subject ↗

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