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

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[Home](./index.md) &gt; [@loopback/typeorm](./typeorm.md) &gt; [ApplicationUsingTypeOrm](./typeorm.applicationusingtypeorm.md) &gt; [connection](./typeorm.applicationusingtypeorm.connection.md)

## ApplicationUsingTypeOrm.connection() method

**Signature:**

```typescript
connection(options: ConnectionOptions): void;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  options | ConnectionOptions |  |

**Returns:**

void