Conceptual image of an AngularJS codebase.

This is actually a pretty good introduction to doing state management without using a framework such as Redux or MobX.

This tutorial builds up from first principles and ends with a streams style reactive UI.

State immutablity is considered an optional thing which is something I disagree with but there’s nothing stopping you from handling things immutably.

http://meiosis.js.org/tutorial/01-hello-world-react.html