ReduxStoreActionReducer

import { createStore } from 'redux';

const reducer = function(state, action){
  if(action.type === 'CMT'){
    return state + action.payload;
  }
  return state;
}

const store = createStore(r, {
  user: {
    name: 'wacko',
    age: 48
  },
  commentCount: 2,
  loginHistory: {
    loginDate: '2017-01-01',
    result: 'success'
  },
  ...
});

//Action dispatched to your Store
store.dispatch({ type: 'CMT', payload: 1 });

//Called any time an action is dispatched
store.subscribe(());