This is a very simple hello world app that you can use as a starting point for your application. https://github.com/facebook/flux/tree/master/examples/flux-todomvc
Check the bottom for: Remaining functionality
yarn
yarn build
# open path/to/flux-shell/index.html in your browser
Instead of manually building after each change it's possible to automatically recompile the javascript bundle when files change:
yarn watch
# make javascript changes, then refresh path/to/flux-shell/index.html