# Header_Plugins # Interface: Header\_Plugins\ Defined in: [types/Header.ts:11](https://github.com/TanStack/table/blob/main/packages/table-core/src/types/Header.ts#L11) Use this interface as a target for declaration merging to add your own plugin properties. Note: This will affect the types of all tables in your project. ## Type Parameters ### TFeatures `TFeatures` *extends* [`TableFeatures`](TableFeatures.md) ### TData `TData` *extends* [`RowData`](../type-aliases/RowData.md) ### TValue `TValue` *extends* [`CellData`](../type-aliases/CellData.md) = [`CellData`](../type-aliases/CellData.md)