Built in React. To build: npm run build, to run: php -S localhost:3000. Keep it simple, stupid!
There are 2 versions. The most basic version is v1 and is a Promise based React app, while v2 is a more complex version that enables slot locking. The v1 is currently available on http://www.vincentbruijn.nl/fruitmachine/
(c) 2018 Vincent Bruijn v@y-a-v-a.org