---
id: fast-element.observationrecord
title: ObservationRecord interface
hide_title: true
---
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[@microsoft/fast-element](./fast-element.md) &gt; [ObservationRecord](./fast-element.observationrecord.md)

## ObservationRecord interface

A record of observable property access.

<b>Signature:</b>

```typescript
export interface ObservationRecord 
```

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [propertyName](./fast-element.observationrecord.propertyname.md) | string | The name of the observable property on [ObservationRecord.propertySource](./fast-element.observationrecord.propertysource.md) that was accessed. |
|  [propertySource](./fast-element.observationrecord.propertysource.md) | any | The source object with an observable property that was accessed. |
