[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [stringNormalizeNullUndefinedToEmpty](./rc-js-util.stringnormalizenullundefinedtoempty.md) ## stringNormalizeNullUndefinedToEmpty() function Replaces `null` / `undefined` with an empty `string`. **Signature:** ```typescript export declare function stringNormalizeNullUndefinedToEmpty(input: string | null | undefined): string; ``` ## Parameters

Parameter	Type	Description
input	string \| null \| undefined

**Returns:** string `input` if it's a `string` of length greater than 0, otherwise an empty `string`. ## Remarks See [stringNormalizeNullUndefinedToEmpty()](./rc-js-util.stringnormalizenullundefinedtoempty.md).