<div id="example"></div>
<div id="footer"></div>
ReactDOM.render(
  <h1>Hello, world!</h1>,
  document.getElementById("example")
);

ReactDOM.render(
  <span>Bye Bye</span>,
  document.getElementById("footer")
);
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External CSS

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External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/react/15.3.1/react.min.js
  2. https://cdnjs.cloudflare.com/ajax/libs/react/15.3.1/react-dom.min.js