The idea with this section is to list nice tools that helps you when writing RxJS code
Found on github link https://github.com/kwintenp/rx-devtools The README lists how to install the the npm/ yarn module and also the chrome plugin.
Very nice tool for visualising what your code does and what values will be emitted.
Just go to the page http://rxfiddle.net/#type=editor and start writing your RxJS expressions. It will show you a visual of what a run looks like. It doesn't get any simpler.