To test this:

yarn install
react-native run-android
# OR
react-native run-ios

Make sure you have yarn installed:

npm i -g yarn

The definitions-test.tsx file was created just for TS compilations tests. It's not a functional piece of code.

Compile typescript with:

npx tsc

PS: Add a --noEmit false flag if you want to see the compiled code.

Important: I haven't tested on iOS (because I can't ☹)