commit 1

src/index.js

@@ -1,12 +1,11 @@
+import 'react-app-polyfill/ie9';
+//import '@babel/polyfill';
 import React from 'react';
 import ReactDOM from 'react-dom';
 import './index.css';
 import App from './App';
-import * as serviceWorker from './serviceWorker';
+import registerServiceWorker from './registerServiceWorker';
+import { HashRouter } from 'react-router-dom';
 
-ReactDOM.render(<App />, document.getElementById('root'));
-
-// If you want your app to work offline and load faster, you can change
-// unregister() to register() below. Note this comes with some pitfalls.
-// Learn more about service workers: http://bit.ly/CRA-PWA
-serviceWorker.unregister();
+ReactDOM.render(<HashRouter><App /></HashRouter>, document.getElementById('root'));
+registerServiceWorker();