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

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[Home](./index.md) &gt; [@loopback/express](./express.md) &gt; [BaseMiddlewareBindingOptions](./express.basemiddlewarebindingoptions.md)

## BaseMiddlewareBindingOptions interface

Options to create a middleware binding for the sequence action or interceptor.

**Signature:**

```typescript
export interface BaseMiddlewareBindingOptions<CTX extends Context> extends MiddlewareCreationOptions 
```
**Extends:** [MiddlewareCreationOptions](./express.middlewarecreationoptions.md)

## Properties

|  Property | Modifiers | Type | Description |
|  --- | --- | --- | --- |
|  [group?](./express.basemiddlewarebindingoptions.group.md) |  | string | _(Optional)_ An optional <code>group</code> name to be used for order of executions |
|  [key?](./express.basemiddlewarebindingoptions.key.md) |  | [BindingAddress](./context.bindingaddress.md)<!-- -->&lt;[GenericInterceptor](./context.genericinterceptor.md)<!-- -->&lt;CTX&gt;&gt; | _(Optional)_ Binding key for the middleware. |