super-props.js

import React from 'react';
import ReactDOM from 'react-dom';

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = { 
      example: 'test'
    };
  }
  
  render() {
    return (
      <div>
          Display stuff like state .....
          {this.state.example}
      </div>
    );
  }
}