I'm doing exactly this now ... the problem is multiple iterations of trying to set an architecture and a pattern to where things go. The architecture presented, if it was to be implemented that way would have been perfectly fine.

Now there are 3 iterations .. with 3 different patterns of what would be a state container, UI business flows split across 3 layers (data access/api, business/decision , view models) and view models (NOT VIEWS) sharing state.

What also doesn't help is the tooling is close to non existent .. I got so used to webpack / lib(framework) dev tools / hot reloading / all in 1 dependency management / intellisense