# Extension

> **API Reference** ▸ [Renderer](/api/renderer.md) ▸ **Extension**

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> [`Source`](https://github.com/Neft-io/neft/blob/f9c128ccb37aa79380c961e878cd76ec9e79c99e/src/renderer/types/extension.litcoffee)


* * * 

### `when`

<dl><dt>Type</dt><dd><i>Boolean</i></dd></dl>


* * * 

### `onWhenChange()`

<dl><dt>Parameters</dt><dd><ul><li>oldValue — <i>Boolean</i></li></ul></dd><dt>Type</dt><dd><i>Signal</i></dd></dl>


> [`Source`](https://github.com/Neft-io/neft/blob/f9c128ccb37aa79380c961e878cd76ec9e79c99e/src/renderer/types/extension.litcoffee#signal-extensiononwhenchangeboolean-oldvalue)


* * * 

### `target`

<dl><dt>Type</dt><dd><i>Item</i></dd></dl>


* * * 

### `onTargetChange()`

<dl><dt>Parameters</dt><dd><ul><li>oldValue — <i>Item</i></li></ul></dd><dt>Type</dt><dd><i>Signal</i></dd></dl>


> [`Source`](https://github.com/Neft-io/neft/blob/f9c128ccb37aa79380c961e878cd76ec9e79c99e/src/renderer/types/extension.litcoffee#signal-extensionontargetchangeitem-oldvalue)


* * * 

### `running`

<dl><dt>Type</dt><dd><i>Boolean</i></dd><dt>Read Only</dt></dl>


* * * 

### `onRunningChange()`

<dl><dt>Parameters</dt><dd><ul><li>oldValue — <i>Boolean</i></li></ul></dd><dt>Type</dt><dd><i>Signal</i></dd></dl>


> [`Source`](https://github.com/Neft-io/neft/blob/f9c128ccb37aa79380c961e878cd76ec9e79c99e/src/renderer/types/extension.litcoffee#signal-extensiononrunningchangeboolean-oldvalue)


* * * 

### `enable()`

> [`Source`](https://github.com/Neft-io/neft/blob/f9c128ccb37aa79380c961e878cd76ec9e79c99e/src/renderer/types/extension.litcoffee#extensionenable)


* * * 

### `disable()`

> [`Source`](https://github.com/Neft-io/neft/blob/f9c128ccb37aa79380c961e878cd76ec9e79c99e/src/renderer/types/extension.litcoffee#extensiondisable)