xxx

project/p9/src/index.js

@@ -0,0 +1,17 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+// ReactDOM.render(
+//   <React.StrictMode>
+//     <App />
+//   </React.StrictMode>,
+//   document.getElementById('root')
+// );
+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: https://bit.ly/CRA-PWA
+serviceWorker.unregister();