concept resubscribe in category rxjs

This is an excerpt from Manning's book RxJS in Action. Login to get full access to this book.

Figure 8.9. A resubscribe causes the producer and the observable sequence to execute. If the operator sequence has side effects, then new subscribers could see different results.

A resubscribe re-creates the same pipeline and reexecutes the code that produces events. Although the results emitted by the producer will be implementation dependent, if your observable pipeline remains pure, then you can guarantee that all subscribers will receive the same events for the same input produced.