This template sets up a simple React Native application written in Scala through Scala.js, Slinky, and Expo, it's higly inspired in this template

Once you've created your project, first install npm dependencies with:

npm i 

then compile your Scala code to JavaScript by running

$ sbt fastOptJS

Then, launch the app with Expo

$ npm start

To create a minified app, first build an optimized Scala.js bundle

$ sbt fullOptJS

Then, go to App.js and uncomment module.exports = require("./target/scala-2.13/scalareactnative-opt.js").app; in order to enable the production bundle. Finally, switch Expo to production mode to load your production app.

If you need to develop your app without depending on Expo, you can eject at any time by running npm run eject. This gives you the option to either eject to a "bare" project that uses React Native's build tooling or to an unmanaged ExpoKit project that still uses Expo but lets you add in custom native dependencies.