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

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[Home](./index.md) &gt; [@loopback/express](./express.md) &gt; [buildName](./express.buildname.md)

## buildName() function

Build a name for the middleware

<b>Signature:</b>

```typescript
export declare function buildName<CFG>(middlewareFactory: ExpressMiddlewareFactory<CFG>, providedName?: string, suffix?: string): string | undefined;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  middlewareFactory | [ExpressMiddlewareFactory](./express.expressmiddlewarefactory.md)<!-- -->&lt;CFG&gt; | Express middleware factory function |
|  providedName | string | Provided name |
|  suffix | string | Suffix |

<b>Returns:</b>

string \| undefined