Move into your React development environment and install Redux:
cd webpack-4-quickstart/
npm i redux --save-dev
Create a directory for the store:
mkdir -p src/js/store
Create a new file named index.jsin src/js/storeand finally initialize the store:
// src/js/store/index.js
import { createStore } from "redux";
import rootReducer from "../reducers/index";
const store = createStore(rootReducer);
export default store;
createStore is the function for creating the Redux store.
createStore takes a reducer as the first argument, rootReducer in our case.