ref-example.jsx

class MyApp extends Component {

  fullCalendar = React.createRef()

  render() {
    return (
      <div>
        <button onClick={ this.handleNext }>goto next</button>
        <FullCalendar ref={ this.fullCalendar } />
      </div>
    )
  }
  
  handleNext = () => {
    let calendarApi = this.fullCalendar.current.getApi()
    calendarApi.next()
  }
  
}
  
  
      

I like it, feels really clean.