---
title: undefined_
---

# undefined_

<a href="https://github.com/remix-run/remix/blob/remix@3.0.0-alpha.6/packages/data-schema/src/lib/schema.ts#L1001" target="_blank">View Source</a>

## Summary

Create a schema that accepts `undefined`.

## Signature

```ts
function undefined_(): Schema<unknown, undefined>;

```

## Returns

A schema that produces `undefined`