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---
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) > [@loopback/express](./express.md) > [BaseMiddlewareBindingOptions](./express.basemiddlewarebindingoptions.md)
## BaseMiddlewareBindingOptions interface
Options to create a middleware binding for the sequence action or interceptor.
<b>Signature:</b>
```typescript
export interface BaseMiddlewareBindingOptions<CTX extends Context> extends MiddlewareCreationOptions
```
<b>Extends:</b> [MiddlewareCreationOptions](./express.middlewarecreationoptions.md)
## Properties
| Property | Type | Description |
| --- | --- | --- |
| [group?](./express.basemiddlewarebindingoptions.group.md) | string | <i>(Optional)</i> An optional <code>group</code> name to be used for order of executions |
| [key?](./express.basemiddlewarebindingoptions.key.md) | [BindingAddress](./context.bindingaddress.md)<!-- --><[GenericInterceptor](./context.genericinterceptor.md)<!-- --><CTX>> | <i>(Optional)</i> Binding key for the middleware. |