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---
lang: en
title: 'API docs: rest.validationoptions.ajverrors'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/rest
permalink: /doc/en/lb4/apidocs.rest.validationoptions.ajverrors.html
---
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
[Home](./index.md) > [@loopback/rest](./rest.md) > [ValidationOptions](./rest.validationoptions.md) > [ajvErrors](./rest.validationoptions.ajverrors.md)
## ValidationOptions.ajvErrors property
Enable custom error messages in JSON-Schema for AJV validator from https://github.com/epoberezkin/ajv-errors - `true`<!-- -->: Enable `ajv-errors` - `AjvErrorOptions`<!-- -->: Enable `ajv-errors` with options
<b>Signature:</b>
```typescript
ajvErrors?: AjvErrorOptions;
```