---
id: fast-foundation.listboxoption.checkedchanged
title: ListboxOption.checkedChanged() method
hide_title: true
---
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[@microsoft/fast-foundation](./fast-foundation.md) &gt; [ListboxOption](./fast-foundation.listboxoption.md) &gt; [checkedChanged](./fast-foundation.listboxoption.checkedchanged.md)

## ListboxOption.checkedChanged() method

Updates the ariaChecked property when the checked property changes.

<b>Signature:</b>

```typescript
protected checkedChanged(prev: boolean | unknown, next?: boolean): void;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  prev | boolean \| unknown | the previous checked value |
|  next | boolean | the current checked value |

<b>Returns:</b>

void
