See NuclearJS: Getting Started for a detailed explanation of this example.
Taken (and slightly modified) from https://github.com/voronianski/flux-comparison
You must have npm installed on your computer. From the root project directory run these commands from the command line:
npm install
This will install all dependencies.
To build the project, first run this command:
npm start
After starting the watcher, you can open index.html in your browser to
open the app.