ngx-datatable html select update value

ngx-datatable-html-select-update-value.ts

/**
   * Update select list (html select)
   */
  updateValueList(event, cell, rowIndex, row) {
    var data = {
      //"nid": [{"value": row.nid}],
      "type":[{"target_id":"request_material"}],
      "field_req_material_state": [{"value": event.target.value}]
    };
    
    this._rest.patchResource(`/node/${row.nid}`, data).subscribe(res => {
      this.rows[rowIndex][cell] = event.target.value;
      this.rows = [...this.rows];
    });
  }