PiJS.app is fullstack, isomorphic JavaScript for the Raspberry Pi. It's also React Progressive Web App. It's also Open Source.
In the project directory, you run yarn run
to get a ilst of available scripts. All the old favourites are there.
start, deploy, build, serve... etc
This project was bootstrapped with Create React App. You can learn more in the Create React App documentation To learn React, check out the React documentation