I created a simplified javascript statechart implementation several years ago, which I used to describe client-side application state: https://github.com/gregwe

I created a simplified javascript statechart implementation several years ago, which I used to describe client-side application state: https://github.com/gregwebs/StateTree https://github.com/gregwebs/StateTree This approach worked quite well for me at the time and still seems to have more clarity for high-level state management than the modern redux approach.