React booking.js

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js" defer></script>
<script src="https://cdn.timekit.io/booking-js/v2/booking.min.js" defer></script>
<div id="app"></div>

React

class TestApp extends React.Component {
  componentDidMount() {
    var widget = new TimekitBooking();
    widget.init({
      app_key: 'live_widget_key_yYXHsUurvCUctNYflzGDMqEJo6mol0Yo',
      project_id: '352a29be-9ec4-4875-ac87-cb5fb3a2fe62'
    });
  }
  render() {
    return (
      <div>
        <h2>Widget:</h2>
        <div id="bookingjs"></div>
      </div>
    )
  }
}

ReactDOM.render(<TestApp />, document.querySelector("#app"))