---
id: fast-element.subscriber
title: Subscriber interface
hide_title: true
---
<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[@microsoft/fast-element](./fast-element.md) &gt; [Subscriber](./fast-element.subscriber.md)

## Subscriber interface

Implemented by objects that are interested in change notifications.

<b>Signature:</b>

```typescript
export interface Subscriber 
```

## Methods

|  Method | Description |
|  --- | --- |
|  [handleChange(source, args)](./fast-element.subscriber.handlechange.md) | Called when a source this instance has subscribed to changes. |
