---
url: /api/kiln/variables/Changed.md
---
[Kiln API](../../index.md) / [kiln](../index.md) / Changed

# Variable: Changed

```ts
const Changed: (...traits) => TrackParam;
```

Filter: entities whose traits changed since this system last ran.

## Parameters

| Parameter | Type |
| ------ | ------ |
| ...`traits` | `Trait`\[] |

## Returns

`TrackParam`