Is RxJS worth learning?

I would say yes . Especially if you are thinking of learning Angular. because Angular heavily use RXJS component, specially Observables. It is worth notice that so far Observable are the best way of handling asynchronous data in javascript.

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What does RxJS pipe do?

RxJS’ pipe() is both a standalone function and a method on the Observable interface that can be used to combine multiple RxJS operators to compose asynchronous operations . The pipe() function takes one or more operators and returns an RxJS Observable.

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