render() {
  return (
    <div id="hot-app">
      <HotTable data={this.data} colHeaders={true} rowHeaders={true} width="600" height="300" stretchH="all" />
    </div>
  );
}

var ht = new Handsontable(document.getElementById('example1'), options);

componentDidMount() {
  const hot = new Handsontable(document.getElementById('hot'));
  // hot.countCols();
}

render() {
  return (
    <React.Fragment>
      <HotTable id="hot" settings={...} />
    </React.Fragment>
  );
}