rc-js-util/docs/rc-js-util.stringnormalizeemptytoundefined.md

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

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## stringNormalizeEmptyToUndefined() function

Replaces length 0 strings with `undefined`<!-- -->.

**Signature:**

```typescript
export declare function stringNormalizeEmptyToUndefined(input: string | null | undefined): string | undefined;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

input


</td><td>

string \| null \| undefined


</td><td>


</td></tr>
</tbody></table>
**Returns:**

string \| undefined

`input` if it's a `string` of length greater than 0, otherwise `undefined`<!-- -->.

## Remarks

See [stringNormalizeEmptyToUndefined()](./rc-js-util.stringnormalizeemptytoundefined.md)<!-- -->.