---
title: "Row Grouping - Displaying Grouped Data"
enterprise: true
framework: javascript
version: "36.1.0"
---

# Row Grouping - Displaying Grouped Data

Grouping hierarchy can be displayed in the grid in different ways.

## Display Types

The row hierarchy can be shown in three different ways, configured by the `groupDisplayType` grid option:

- A [Single Group Column](https://www.ag-grid.com/javascript-data-grid/grouping-single-group-column/) containing all row group levels.
- [Multiple Group Columns](https://www.ag-grid.com/javascript-data-grid/grouping-multiple-group-columns/) with each column representing a row group level.
- [Group Rows](https://www.ag-grid.com/javascript-data-grid/grouping-group-rows/) where parent rows are displayed as full width rows.

#### Grouping Display Types

```ts
import {
  ClientSideRowModelModule,
  GridApi,
  GridOptions,
  ModuleRegistry,
  RowGroupingDisplayType,
  createGrid,
  enableDevValidations,
} from "ag-grid-community";
import { RowGroupingModule } from "ag-grid-enterprise";
import { IOlympicData } from "./interfaces";

// Enable extended validations only for development
if (process.env.NODE_ENV !== "production") {
  enableDevValidations();
}

ModuleRegistry.registerModules([ClientSideRowModelModule, RowGroupingModule]);

let gridApi: GridApi<IOlympicData>;

const gridOptions: GridOptions<IOlympicData> = {
  columnDefs: [
    { field: "country", rowGroup: true, hide: true },
    { field: "year", rowGroup: true, hide: true },
    { field: "athlete" },
    { field: "sport" },
    { field: "gold" },
    { field: "silver" },
    { field: "bronze" },
  ],
  defaultColDef: {
    flex: 1,
    minWidth: 100,
  },
  autoGroupColumnDef: {
    minWidth: 200,
  },
  groupDefaultExpanded: 1,
};

function onDisplayTypeChange() {
  const displayType = (
    document.querySelector("#input-display-type") as HTMLSelectElement
  ).value as RowGroupingDisplayType;
  gridApi!.setGridOption("groupDisplayType", displayType);
}

var gridDiv = document.querySelector<HTMLElement>("#myGrid")!;
gridApi = createGrid(gridDiv, gridOptions);

fetch("https://www.ag-grid.com/example-assets/olympic-winners.json")
  .then((response) => response.json())
  .then((data: IOlympicData[]) => gridApi!.setGridOption("rowData", data));

if (typeof window !== "undefined") {
  // Attach external event handlers to window so they can be called from index.html
  (<any>window).onDisplayTypeChange = onDisplayTypeChange;
}
```

[Live example: Grouping Display Types](https://www.ag-grid.com/examples/grouping-display-types/group-display-types/typescript)

To configure the display type, set the `groupDisplayType` property in the grid options to one of `"singleColumn"`, `"multipleColumns"` or `"groupRows"` as demonstrated in the following configuration:

```js
const gridOptions = {
    groupDisplayType: 'multipleColumns',

    // other grid options ...
}
```

> **Note**
>
> While not advised, it is also possible to configure these columns using [Custom Group Columns](https://www.ag-grid.com/javascript-data-grid/grouping-custom-group-columns/).