---
id: fast-element.behavior.unbind
title: Behavior.unbind() method
hide_title: true
---
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[@microsoft/fast-element](./fast-element.md) &gt; [Behavior](./fast-element.behavior.md) &gt; [unbind](./fast-element.behavior.unbind.md)

## Behavior.unbind() method

Unbinds this behavior from the source.

<b>Signature:</b>

```typescript
unbind(source: unknown): void;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  source | unknown | The source to unbind from. |

<b>Returns:</b>

void
