index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>React Basic</title>
  </head>
  <body>
    <!-- <h1>Header it will be there always</h1> -->
    <div id="root">
      this is react app root it will be replaced because ReactDOM uses innerHTML
      looks like
    </div>
    <!-- <h1>Footer it will be there always</h1> -->
    <!-- first file is just react code can be used as react native apps but the second script helps us to use react on browser to connect -->
    <!-- <script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script>
        <script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script> -->
    <script type="module" src="App.js"></script>
  </body>
</html>