RxJS has a flexible implementation comparing e.g. to RxJava, separating the operators from the observable object itself. This allows other developers to create their own operators and even publish them as third-party libraries. This is the case e.g. for the RxJSx library containing operators for dealing with arrays and tuples. In this talk, we will introduce the RxJS operators ecosystem, draw some examples from RxJSx to showcase how to use operators from a third-party library, and finally showcase how one can create their own operators.