@loopback/docs/site/apidocs/context.contextsubscriptionmanager.issubscribed.md

Documentation for LoopBack 4

---
lang: en
title: 'API docs: context.contextsubscriptionmanager.issubscribed'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/packages/context
permalink: /doc/en/lb4/apidocs.context.contextsubscriptionmanager.issubscribed.html
---

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [ContextSubscriptionManager](./context.contextsubscriptionmanager.md) &gt; [isSubscribed](./context.contextsubscriptionmanager.issubscribed.md)

## ContextSubscriptionManager.isSubscribed() method

Check if an observer is subscribed to this context

<b>Signature:</b>

```typescript
isSubscribed(observer: ContextObserver): boolean;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  observer | <code>ContextObserver</code> | Context observer |

<b>Returns:</b>

`boolean`