How to Create ReactJs Route Exmaple...?

Question

~> https://www.tutorialspoint.com/reactjs/reactjs_router.htm

 

Above Link Using Reference, I Have Create One Example but Proper Not Working So please Help Me anybody ...?

 

./src/App.js
  Line 499:  Parsing error: Only one default export allowed per module.

  497 |    }
  498 | }
> 499 | export default Home;
      | ^
  500 |
  501 | class About extends React.Component {
  502 |    render() {

 I have Created Task in Above Write error Generated .