@loopback/docs/site/apidocs/socketio.socketiobooter._constructor_.md

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

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[Home](./index.md) &gt; [@loopback/socketio](./socketio.md) &gt; [SocketIoBooter](./socketio.socketiobooter.md) &gt; [(constructor)](./socketio.socketiobooter._constructor_.md)

## SocketIoBooter.(constructor)

Constructs a new instance of the `SocketIoBooter` class

<b>Signature:</b>

```typescript
constructor(app: Application, projectRoot: string, socketioControllerConfig: ArtifactOptions, socketioServer: SocketIoServer);
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  app | [Application](./core.application.md) |  |
|  projectRoot | string |  |
|  socketioControllerConfig | [ArtifactOptions](./boot.artifactoptions.md) |  |
|  socketioServer | [SocketIoServer](./socketio.socketioserver.md) |  |