learning-redux-App-Reducer-ActionType.js

import React from 'react'
import { Provider } from 'react-redux'
import { createStore } from 'redux'
import CounterContainer from './Counter.container'

const initialState = {
  count: 0
};

function reducer(state = initialState, action) {
  if (action.type === "INCREMENT") {
    return {
      count: state.count + 1
    }
  }

  return state
}

const store = createStore(reducer)

const App = () => (
  <Provider store={store}>
    <CounterContainer />
  </Provider>
)

export default App