dispatcher - Asynchronous

1. Program Flow

     1) Synchronous

     2) Asynchronous

2. redux-saga

    about CQRS:

Event-sourcing

    1) Home

     https://redux-saga.js.org/

    2) Install

$ npm install --save redux-saga

   3) examples

    https://github.com/redux-saga/redux-saga/tree/master/examples

Reference:

     1. UNIDIRECTIONAL USER INTERFACE ARCHITECTURES - André Staltz

     2.  Clarified CQRS