Where Flux applications traditionally have multiple stores, Redux applications have only one global, read-only application state. This state is calculated by "reducing" over a collection or stream of actions that update it in controlled ways.
What is @ngrx?
Redux state managers have been very well received and have inspired the creation of @ngrx, a set of modules that implement the same way of managing state as well as some of the middleware and tools in the Redux ecosystem. @ngrx was created to be used specifically with Angular and RxJS, as it leans heavily on the observable paradigm.
We'll describe how to use this approach in an application.