---
title: "ErrorMap"
source: "https://github.com/remix-run/remix/blob/8905f3943706e1f53696ab83e70a84873cabfc90/packages/data-schema/src/lib/schema.ts#L40"
---

# ErrorMap

## Summary

Function used to customize issue messages.

Return `undefined` to use the default message.

## Signature

```ts
type ErrorMap = (context: ErrorMapContext) => string | undefined

```