## ReconnectingWebSocket.extensions property [​](/content/docs/sdk/core.reconnectingwebsocket.extensions#reconnectingwebsocketextensions-property/index.html)

**Signature:**

```typescript
get extensions(): string;
```

- [ReconnectingWebSocket.extensions property](/content/docs/sdk/core.reconnectingwebsocket.extensions#reconnectingwebsocketextensions-property/index.html)