---
id: fast-element.notifier.source
title: Notifier.source property
hide_title: true
---
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[@microsoft/fast-element](./fast-element.md) &gt; [Notifier](./fast-element.notifier.md) &gt; [source](./fast-element.notifier.source.md)

## Notifier.source property

The source object that this notifier provides change notification for.

<b>Signature:</b>

```typescript
readonly source: any;
```