It has nothing to do with React (in fact, React, despite its name, does not represent the paradigm of reactive programming). This is for javascript programmers

It has nothing to do with React (in fact, React, despite its name, does not represent the paradigm of reactive programming). This is for javascript programmers who enjoy functional programming and want an introduction into Rx.js library. It may also be of interest for programmers in other languages (because rx has been implemented in many of them).