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Rxjava has a method Observable.never(), that creates an empty observable, that never completes and never emits anything.
What is the purpose of that specific observable?
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An Observable that emits no items to the Observer and never completes.
The RxJS isEmpty() operator returns an observable with a Boolean value indicating whether the observable was empty or not. It returns an output as true if the source observable is empty; otherwise, false.
RxJS is one of the key libraries each modern JavaScript developer should have in his kit. It's a library that helps developers simplify the process of composing callback-based or asynchronous code.
The main purpose is to prevent completing a stream or provide non-emitting Observable to operators that otherwise react to signals of secondary sources (for example, window, takeUntil). In addition, it is great for testing timeout with sequences.
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