Extension Types

The declaration of an extension is done by an Extension Manifest, either registered via an Umbraco-Package Manifest or directly to the Extension Registry in JavaScript.

This page is a work in progress and may undergo further revisions, updates, or amendments. The information contained herein is subject to change without notice.

Extension Manifest Type

Each Extension Manifest has to declare its type, this is used to determine where it hooks into the system. It also looks at what data is required to declare within it.

The abilities of the extensions rely on the specific extension type. The Type sets the scene for what the extension can do and what it needs to be utilized. Some extension types rely on a reference to other extensions.

The pages of this article describe all the extension types that Backoffice supports. Here is a list of the most common types:

Creating a Custom DashboardProperty Editors CompositionSections & Trees

Declare Extension Manifest

Extension Manifest and can be declared in multiple ways. One of these is to declare it as part of the Umbraco Package Manifest.

You can declare new Extension Manifests in JavaScript at any given point.

import { umbExtensionsRegistry } from "@umbraco-cms/backoffice/extension-registry"

const manifest = {
    type: '...',


Backoffice also comes with two Extension types which can be used to register more extensions.

Using bundle to declare other Extension Manifest

The bundle extension type can be used for declaring multiple Extension Manifests with JavaScript in a single file.

The bundle declares a single JavaScript file that will be loaded at startup. All the Extension Manifests exported from this Module will be registered in the Extension Registry.

Read more about the bundle extension type in the Bundle article.

Using backofficeEntryPoint as your foundation

The backofficeEntryPoint extension type is special, it can be used to run any JavaScript code at startup. This can be used as an entry point for a package. The entry point declares a single JavaScript file that will be loaded and run when the Backoffice starts.

The entryPbackofficeEntryPointoint extension is also the way to go if you want to load in external libraries such as jQuery, Angular, React, etc. You can use the backofficeEntryPoint to load in the external libraries to be shared by all your extensions. Loading global CSS files can also be used in the backofficeEntryPoint extension.

Read more about the backofficeEntryPoint extension type in the Entry Point article.

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