What is RxJS?

RxJS stands for Reactive Extensions for JavaScript and is a library. It allows us to leverage observables in our JavaScript project, allowing us to do reactive programming. Because it allows us to combine our asynchronous actions or callback-based code into a sequence of operations executed on a stream of data that emits values from a publisher to a subscriber, RxJS is utilized in many popular frameworks like Angular. Other languages, such as Java and Python, provide packages that make it possible to build reactive code utilizing observables.