This is a small dummy app that I'm using to learn Mithril and TypeScript. It's very unlikely to be interesting to you, but if you find it interesting, have fun. Fork it, do whatever. It's largely just an adaptation of the main Mithril tutorial, tweaked for TypeScript and my own sanity. (I.e., brunch, not webpack, etc.).
To run it, you should be able to get away with
yarn npm start
And then enjoy things hot-loading on http://localhost:3333. Enjoy!