Redux 和 Ngrx
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.
One popular Angular 2 specific implementation of the Redux pattern is Ng2-Redux, which we'll be using to describe how to use this approach in an application.
What is Ngrx?
Redux implementation has been very well received and has 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 2 and RxJS, as it leans heavily on the observable paradigm.
Although we'll be using Ng2-Redux, a lot of the same lessons apply with regards to ngrx though the syntax may be different and have some slight differences in what abstractions are involved.
For further on Redux and ngrx see the Further reading section