---
id: fast-element.subscriberset.has
title: SubscriberSet.has() method
hide_title: true
---
<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[@microsoft/fast-element](./fast-element.md) &gt; [SubscriberSet](./fast-element.subscriberset.md) &gt; [has](./fast-element.subscriberset.has.md)

## SubscriberSet.has() method

Checks whether the provided subscriber has been added to this set.

<b>Signature:</b>

```typescript
has(subscriber: Subscriber): boolean;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  subscriber | [Subscriber](./fast-element.subscriber.md) | The subscriber to test for inclusion in this set. |

<b>Returns:</b>

boolean
