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              <html lang="en">

  <title>React JS</title>

  <div id="app"></div>

              html, body {
  margin: 0;
  font-family: 'Roboto', Arial, sans-serif;
  font-size: 1.2em;


import { Button } from 'react-bootstrap';
import { Panel } from 'react-bootstrap';
import { Fade} from 'react-bootstrap';
import { Collapse } from 'react-bootstrap';

class App extends React.Component {
  constructor() {
    this.state = {};

  render() {
    return (
        <Button onClick={ ()=> this.setState({ open: !this.state.open })}>
        <Collapse in={this.state.open}>
              Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid.
              Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.


  <App />, document.getElementById('app')
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