I created a class compatible with Redux time travel and debugging tools that works like this (in typescript): interface FooState { myNumber: number;

I created a class compatible with Redux time travel and debugging tools that works like this (in typescript): interface FooState { myNumber: number; myArray: number[] } class Foo extends DataModelImpl<FooState> implements IDataModel<FooState> {...} Then you use it like so: const foo:IDataModel<FooState> = new Foo() foo.updateState(state => state.myNumber = 10) Anything that wants to be notified when myNumber changes: const callback = (num:number) => {...} const unsubscribe = foo.watch(state => state.myNumber,callback); ... unsubscribe() I've bound this to React, Vue and other view libraries. It even works properly with nested objects. Drawback is that it uses Observers. I believe the next "killer state library" will use a pattern like what I've described above.