@loopback/docs/site/apidocs/express.middlewaregroups.cors.md

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---
lang: en
title: 'API docs: express.middlewaregroups.cors'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
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[Home](./index.md) &gt; [@loopback/express](./express.md) &gt; [MiddlewareGroups](./express.middlewaregroups.md) &gt; [CORS](./express.middlewaregroups.cors.md)

## MiddlewareGroups.CORS variable

Enforce CORS

<b>Signature:</b>

```typescript
CORS = "cors"
```