# CustomAggregationFns

# Type Alias: CustomAggregationFns\<TFeatures, TData\>

```ts
type CustomAggregationFns<TFeatures, TData> = Record<string, AggregationFn<TFeatures, TData>>;
```

Defined in: [features/column-grouping/columnGroupingFeature.types.ts:39](https://github.com/TanStack/table/blob/main/packages/table-core/src/features/column-grouping/columnGroupingFeature.types.ts#L39)

## Type Parameters

### TFeatures

`TFeatures` *extends* [`TableFeatures`](../interfaces/TableFeatures.md)

### TData

`TData` *extends* [`RowData`](RowData.md)