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

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[Home](./index.md) &gt; [@loopback/socketio](./socketio.md) &gt; [SOCKET\_IO\_SUBSCRIBE\_METADATA](./socketio.socket_io_subscribe_metadata.md)

## SOCKET\_IO\_SUBSCRIBE\_METADATA variable

**Signature:**

```typescript
SOCKET_IO_SUBSCRIBE_METADATA: MetadataAccessor<(string | RegExp)[], MethodDecorator>
```