[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [getNestedErrorCtor](./rc-js-util.getnestederrorctor.md) ## getNestedErrorCtor() function Factory for creating a localized `NestedError` class, see [INestedError](./rc-js-util.inestederror.md). This should be used to create a base class, from which you can create extensions to represent specific error cases. **Signature:** ```typescript export declare function getNestedErrorCtor(config: INestedErrorCtorConfig): INestedErrorCtor>; ``` ## Parameters

Parameter	Type	Description
config	[INestedErrorCtorConfig](./rc-js-util.inestederrorctorconfig.md)<TLocalization>

**Returns:** [INestedErrorCtor](./rc-js-util.inestederrorctor.md)<TLocalization, [INestedError](./rc-js-util.inestederror.md)<TLocalization>>