import VirtualList from 'react-virtual-drag-list';

function Virtual() {

  const [list, setList] = useState([{id: '1', text: 'a'}, {id: '2', text: 'b'}, ...]);

  const onDrop = (event) => {
    // dnd complete
    setList(() => event.list);
  }

  // use style and className as jsx used
  return (
    <VirtualList
      className="virtual-list"
      style={{ height: '500px' }}
      dataKey="id"
      dataSource={ list }
      handle=".handle"
      header={ <div className="loading">top loading...</div> }
      footer={ <div className="loading">bottom loading...</div> }
      onDrop={ onDrop }
    >
      {
        (record, index, dataKey) => {
          return (
            <div>
              <span className=".handle">{ index }</span>
              { record.text }
            </div>
          )
        }
      }
    </VirtualList>
  )
}

...

const virtualRef = useRef();

const scrollToBottom = () => {
  virtualRef.current.scrollToBottom();
}

return (
  <button onClick={ scrollToBottom }></button>
  <virtualList
    ref={ virtualRef }
    ...
  >
    {
      (record) => <div>{ record.text }</div>
    }
  </virtualList>
)