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

## PropertyChangeNotifier.source property

The source that property changes are being notified for.

<b>Signature:</b>

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