Setting react App in codepen

Dear Campers,

My react app is failing to render here on Codepen while the same code renders seamlessly
on On Scrimba. What is happening on codepen?

@nibble You have several things causing your problems in Codepen.

  1. You need to add Babel as a preprocessor under the JS Module
  2. You need to make sure the react-dom library is added after (not before) the react library.
  3. In the following line, you need to preface Component with React.
class App extends Component{

Thanks for taking time to answer this question