text: 
  class Example extends React.Component {
    constructor(...args) {
      super(...args);
      this.state = {};
    }
  
    render() {
      return (
        <div>
          <Button onClick={() => this.setState({ open: !this.state.open })}>
            click
          </Button>
          <Fade in={this.state.open}>
            <div>
              <Well>
                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.
              </Well>
            </div>
          </Fade>
        </div>
      );
    }
  }
  
  ReactDOM.render(<Example />, mountNode);
  