Check out example codes for "html grundgerüst". It will help you in understanding the concepts better.

Code Example 1

<!DOCTYPE html>
<html lang="de">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Titel</title>
  </head>
  <body>

  </body>
</html>

Learn ReactJs, React Native from akashmittal.com