React 16 boilerplate

index.js

import React from 'react';
// import ReactDOM from 'react-dom/client';
import {render} from 'react-dom'
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';

const container = document.getElementById('root');
render(
  <React.StrictMode>
    <App />
  </React.StrictMode>, container)


// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();