Interface: Extension

1st chunk of `content/reference/api/extensions-sdk/Extension.md`

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---
title: "Interface: Extension"
description: Docker extension API reference
keywords: Docker, extensions, sdk, API, reference
aliases:
 - /desktop/extensions-sdk/dev/api/reference/interfaces/Extension/
 - /extensions/extensions-sdk/dev/api/reference/interfaces/Extension/
---

**`Since`**

0.2.0

## Properties

### vm

• `Optional` `Readonly` **vm**: [`ExtensionVM`](ExtensionVM.md)

___

### host

• `Optional` `Readonly` **host**: [`ExtensionHost`](ExtensionHost.md)

___

### image

• `Readonly` **image**: `string`

**`Since`**

0.3.3

Title: Interface: Extension - Properties

Summary

This section describes the properties of the 'Extension' interface, including 'vm' (an optional ExtensionVM object), 'host' (an optional ExtensionHost object), and 'image' (a string representing the extension's image). The 'image' property was added in version 0.3.3, while the interface itself was introduced in version 0.2.0.