gestione visualizzazione dopo 15 secondi

src/index.js

@@ -4,7 +4,7 @@ import React from 'react';
 import ReactDOM from 'react-dom';
 import App from './App';
 import registerServiceWorker from './registerServiceWorker';
-import { HashRouter } from 'react-router-dom';
+import { HashRouter, BrowserRouter } from 'react-router-dom';
 
 ReactDOM.render(<HashRouter><App /></HashRouter>, document.getElementById('root'));
 registerServiceWorker();