It's easier to understand what's happening if you can look at it.

rxvision is a tool to visualize and debug your RxJS reactive streams.

You'll need webpack installed globally (npm install -g webpack).

npm install
webpack

Then you need to run a static server (so ajax will work in the demo). I use http-server (npm install -g http-server):

http-server -p 4321

then open http://localhost:4321/examples/gh-follow/index.html in a browser.

Check out the gh-follow source, or play with the playground here.