index.js

import React from "react";
import ReactDOM from "react-dom";
import { BrowserRouter } from "react-router-dom";
import { Provider } from "react-redux";
import { createStore, applyMiddleware, compose } from "redux";
import thunk from "redux-thunk";
import rootReducer from "./src/reducers";
import App from "./src/app";

import "./node_modules/bootstrap/dist/css/bootstrap.min.css";
import "./css/normalize.css";
import "./css/main.css";

const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;

const store = createStore(rootReducer, composeEnhancers(applyMiddleware(thunk)));

ReactDOM.render(
    <Provider store={store}>
        <BrowserRouter>
            <App />
        </BrowserRouter>
    </Provider>,
    document.getElementById("root")
);