Play it here!

Set up.

$ npm install
$ npm start

At this point, you could open static files and manually build after changing files.

$ open dist/index.html
$ npm run build

You could also use elm reactor to automatically run your build. Just refresh the page after making changes.

$ npm run reactor
$ open http://localhost:8000/src/Main.elm

elm-format is used to format the code here.

$ npm run format