@loopback/docs/site/apidocs/authentication-jwt.jwtauthenticationcomponent._constructor_.md

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---
lang: en
title: 'API docs: authentication-jwt.jwtauthenticationcomponent._constructor_'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/extensions/authentication-jwt
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---

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[Home](./index.md) &gt; [@loopback/authentication-jwt](./authentication-jwt.md) &gt; [JWTAuthenticationComponent](./authentication-jwt.jwtauthenticationcomponent.md) &gt; [(constructor)](./authentication-jwt.jwtauthenticationcomponent._constructor_.md)

## JWTAuthenticationComponent.(constructor)

Constructs a new instance of the `JWTAuthenticationComponent` class

<b>Signature:</b>

```typescript
constructor(app: Application);
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  app | [Application](./core.application.md) |  |