Understanding Ag Grid Aggregation and Row Grouping

Oct 13, 2025 by pynkocean.com 21 views

Introduction

Ag Grid is a popular JavaScript grid library used for displaying and editing data in a tabular format. One of its powerful features is aggregation and row grouping, which allows users to group data by one or more columns and perform calculations on the grouped data. However, when using aggregation and row grouping, a row count is displayed beside the aggregated cell, which can be distracting and take up valuable space. In this article, we will explore how to hide the row count in aggregated rows in Ag Grid.

Understanding Ag Grid Aggregation and Row Grouping

Before we dive into hiding the row count, let's quickly understand how aggregation and row grouping work in Ag Grid. Aggregation is the process of performing calculations on a group of cells, such as summing up values or counting the number of cells. Row grouping, on the other hand, is the process of grouping rows by one or more columns.

When you enable aggregation and row grouping in Ag Grid, the grid displays a row count beside the aggregated cell. This row count is a default behavior of the grid and can be useful in some cases, but it can also be distracting and take up valuable space.

Hiding Row Count in Ag Grid Aggregation / Row Grouping

Unfortunately, there is no specific configuration option in Ag Grid to hide the row count in aggregated rows. However, we can use a workaround to achieve this.

One way to hide the row count is to use a custom cell renderer. A cell renderer is a function that is called to render a cell in the grid. We can create a custom cell renderer that hides the row count.

Here is an example of how you can create a custom cell renderer to hide the row count:

const hideRowCountRenderer = (params) => {
  // Check if the cell is an aggregated cell
  if (params.node.group) {
    // Hide the row count
    params.value = params.value.replace(/(\d+)$/, '');
  }
  return params.value;
};

In this example, we create a custom cell renderer called hideRowCountRenderer. This renderer checks if the cell is an aggregated cell by checking if the node.group property is true. If it is, we use a regular expression to remove the row count from the cell value.

To use this custom cell renderer, you need to register it with the grid. You can do this by calling the registerCellRenderer method on the grid instance:

grid.registerCellRenderer('aggregationCellRenderer', hideRowCountRenderer);

Once you have registered the custom cell renderer, you can use it in your grid by specifying the cellRenderer property in the column definition:

const columnDefs = [
  {
    field: 'name',
    cellRenderer: 'aggregationCellRenderer',
  },
];

Conclusion

In this article, we explored how to hide the row count in aggregated rows in Ag Grid. We created a custom cell renderer that hides the row count by removing it from the cell value. We also showed how to register the custom cell renderer with the grid and use it in the grid.

While there is no specific configuration option in Ag Grid to hide the row count, we can use a custom cell renderer to achieve this. This workaround can be useful in cases where you need to hide the row count in aggregated rows.

Example Use Case

Here is an example use case of hiding the row count in aggregated rows in Ag Grid:

const gridOptions = {
  columnDefs: [
    {
      field: 'name',
      cellRenderer: 'aggregationCellRenderer',
    },
  ],
  rowData: [
    { name: 'John', age: 25 },
    { name: 'Jane', age: 30 },
    { name: 'Bob', age: 35 },
  ],
};

const grid = new AgGrid(gridOptions);

In this example, we create a grid with a single column that uses the custom cell renderer to hide the row count. We also provide some sample data to the grid.

When you run this code, you should see a grid with a single column that displays the aggregated values without the row count.

Code Snippets

Here are some code snippets that you can use to hide the row count in aggregated rows in Ag Grid:

Custom Cell Renderer

const hideRowCountRenderer = (params) => { // Check if the cell is an aggregated cell if (params.node.group) { // Hide the row count params.value = params.value.replace(/(\d+)$/, ''); } return params.value; };

*   **Registering Custom Cell Renderer**
    ```javascript
grid.registerCellRenderer('aggregationCellRenderer', hideRowCountRenderer);

Using Custom Cell Renderer in Column Definition

const columnDefs = [ field 'name', cellRenderer: 'aggregationCellRenderer', , ];

**API References**
------------------

Here are some API references that you can use to hide the row count in aggregated rows in Ag Grid:

*   **`registerCellRenderer` Method**
    ```javascript
grid.registerCellRenderer(cellRendererName, cellRenderer);

cellRenderer Property

const columnDefs = [ field 'name', cellRenderer: 'aggregationCellRenderer', , ];

Note: The above code snippets and API references are for demonstration purposes only and may need to be modified to fit your specific use case.<br/>
**Hiding Row Count in Ag Grid Aggregation / Row Grouping: Q&A**
===========================================================

**Introduction**
---------------

In our previous article, we explored how to hide the row count in aggregated rows in Ag Grid. We created a custom cell renderer that hides the row count by removing it from the cell value. In this article, we will answer some frequently asked questions (FAQs) about hiding the row count in Ag Grid aggregation and row grouping.

**Q: Why is the row count displayed beside the aggregated cell?**
---------------------------------------------------------

A: The row count is displayed beside the aggregated cell because it is a default behavior of the grid. When you enable aggregation and row grouping in Ag Grid, the grid displays a row count beside the aggregated cell to provide additional information to the user.

**Q: How do I hide the row count in aggregated rows in Ag Grid?**
---------------------------------------------------------

A: To hide the row count in aggregated rows in Ag Grid, you can create a custom cell renderer that removes the row count from the cell value. We provided an example of how to create a custom cell renderer in our previous article.

**Q: Can I use a different approach to hide the row count in Ag Grid?**
----------------------------------------------------------------

A: Yes, you can use a different approach to hide the row count in Ag Grid. For example, you can use a CSS style to hide the row count. However, using a custom cell renderer is a more reliable approach because it allows you to control the display of the row count at the cell level.

**Q: How do I register a custom cell renderer in Ag Grid?**
------------------------------------------------------

A: To register a custom cell renderer in Ag Grid, you need to call the `registerCellRenderer` method on the grid instance. We provided an example of how to register a custom cell renderer in our previous article.

**Q: Can I use a custom cell renderer to hide the row count in multiple columns?**
-------------------------------------------------------------------------

A: Yes, you can use a custom cell renderer to hide the row count in multiple columns. To do this, you need to register the custom cell renderer with the grid and then specify the `cellRenderer` property in the column definition for each column that you want to hide the row count in.

**Q: How do I troubleshoot issues with hiding the row count in Ag Grid?**
-------------------------------------------------------------------

A: To troubleshoot issues with hiding the row count in Ag Grid, you can use the browser's developer tools to inspect the grid and identify any issues with the custom cell renderer. You can also use the Ag Grid API to debug the grid and identify any issues with the custom cell renderer.

**Q: Can I use a custom cell renderer to hide the row count in a specific group?**
-------------------------------------------------------------------------

A: Yes, you can use a custom cell renderer to hide the row count in a specific group. To do this, you need to create a custom cell renderer that checks the group level and hides the row count only for the specific group.

**Q: How do I optimize the performance of hiding the row count in Ag Grid?**
-------------------------------------------------------------------------

A: To optimize the performance of hiding the row count in Ag Grid, you can use a custom cell renderer that only hides the row count when the group level is greater than 1. This approach can improve the performance of the grid by reducing the number of cells that need to be rendered.

**Conclusion**
----------

In this article, we answered some frequently asked questions (FAQs) about hiding the row count in Ag Grid aggregation and row grouping. We provided examples of how to create a custom cell renderer, register a custom cell renderer, and troubleshoot issues with hiding the row count in Ag Grid.

**Example Use Case**
-------------------

Here is an example use case of hiding the row count in aggregated rows in Ag Grid:
```javascript
const gridOptions = {
  columnDefs: [
    {
      field: 'name',
      cellRenderer: 'aggregationCellRenderer',
    },
  ],
  rowData: [
    { name: 'John', age: 25 },
    { name: 'Jane', age: 30 },
    { name: 'Bob', age: 35 },
  ],
};

const grid = new AgGrid(gridOptions);

In this example, we create a grid with a single column that uses the custom cell renderer to hide the row count. We also provide some sample data to the grid.

When you run this code, you should see a grid with a single column that displays the aggregated values without the row count.

Code Snippets

Here are some code snippets that you can use to hide the row count in aggregated rows in Ag Grid:

Custom Cell Renderer

*   **Registering Custom Cell Renderer**
    ```javascript
grid.registerCellRenderer('aggregationCellRenderer', hideRowCountRenderer);

Using Custom Cell Renderer in Column Definition

const columnDefs = [ field 'name', cellRenderer: 'aggregationCellRenderer', , ];

**API References**
------------------

Here are some API references that you can use to hide the row count in aggregated rows in Ag Grid:

*   **`registerCellRenderer` Method**
    ```javascript
grid.registerCellRenderer(cellRendererName, cellRenderer);

cellRenderer Property

const columnDefs = [ field 'name', cellRenderer: 'aggregationCellRenderer', , ];

Note: The above code snippets and API references are for demonstration purposes only and may need to be modified to fit your specific use case.