@loopback/docs/site/apidocs/repository.isentitynotfounderror.md

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---
lang: en
title: 'API docs: repository.isentitynotfounderror'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/repository
permalink: /doc/en/lb4/apidocs.repository.isentitynotfounderror.html
---

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[Home](./index.md) &gt; [@loopback/repository](./repository.md) &gt; [isEntityNotFoundError](./repository.isentitynotfounderror.md)

## isEntityNotFoundError() function

<b>Signature:</b>

```typescript
export declare function isEntityNotFoundError(e: any): e is EntityNotFoundError<any>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  e | any |  |

<b>Returns:</b>

e is [EntityNotFoundError](./repository.entitynotfounderror.md)<!-- -->&lt;any&gt;