问AG Grid:如何将滚动放在底部

EN

<ag-grid-angular
  class="ag-dark"
  [rowData]="messages"
  [columnDefs]="columnDefs"
  [gridOptions]="gridOptions"
  (bodyScroll)="handleScroll($event)"
  (rowDataChanged)="handleRowDataChanged($event)">
</ag-grid-angular>

  gridOptions: GridOptions = {
    suppressScrollOnNewData: true,
  }
  handleRowDataChanged(event) {
    const index = this.messages.length - 1;
    this.gridOptions.api.ensureIndexVisible(index, 'bottom');
  }