Umbraco Header Apps

What is it?

Header apps are single-purpose extensions that appear in Umbraco's top navigation bar, positioned next to the user profile avatar and global search. They provide globally accessible functionality to the Backoffice, such as quick links to documentation, tools, or custom interactive features. Header apps can be simple links or custom interactive components that open modals or perform actions.

Documentation

Always fetch the latest docs before implementing:

• Main docs: https://docs.umbraco.com/umbraco-cms/customizing/extending-overview/extension-types/header-apps

• Foundation: https://docs.umbraco.com/umbraco-cms/customizing/foundation

• Extension Registry: https://docs.umbraco.com/umbraco-cms/customizing/extending-overview/extension-registry

Related Foundation Skills

If you need to explain these foundational concepts when implementing header apps, reference these skills:

Umbraco Element: When implementing interactive header apps, explaining UmbHeaderAppButtonElement, or custom elements

• Reference skill: umbraco-umbraco-element

Context API: When implementing context access, modals, notifications, or services from header apps

• Reference skill: umbraco-context-api

Controllers: When implementing controllers, action handlers, click handlers, or header app behavior

• Reference skill: umbraco-controllers

Workflow

• Fetch docs - Use WebFetch on the URLs above

• Ask questions - What will it do? Simple link or interactive? What icon/label?

• Generate files - Create manifest + element (if interactive) based on latest docs

• Explain - Show what was created and how to test

Minimal Examples

Simple Link Header App (umbraco-package.json)

{ "type": "headerApp", "alias": "My.HeaderApp", "name": "My Header App", "kind": "button", "meta": { "label": "Documentation", "icon": "icon-help", "href": "https://docs.umbraco.com/" } }

Interactive Header App Manifest (manifest.ts)

export const manifests = [ { type: "headerApp", alias: "My.Interactive.HeaderApp", name: "My Interactive Header App", element: () => import('./header-app.element.js'), meta: { label: "Tools", icon: "icon-tools" } } ];

Interactive Header App Element (header-app.element.ts)

import { html, customElement } from '@umbraco-cms/backoffice/external/lit'; import { UmbHeaderAppButtonElement } from '@umbraco-cms/backoffice/header-app';

@customElement('my-header-app') export class MyHeaderAppElement extends UmbHeaderAppButtonElement {

#onClick() { // Handle click - open modal, navigate, etc. console.log('Header app clicked!'); }

render() { return html <uui-button @click="${this.#onClick}" label="${this.manifest?.meta?.label}" compact > <uui-icon name="${this.manifest?.meta?.icon}"></uui-icon> </uui-button> ; } }

export default MyHeaderAppElement;

Common Use Cases

• Quick Links: External documentation, help resources, or admin tools

• Global Actions: Search, notifications, or system-wide operations

• Custom Tools: Integration with external services or custom functionality

That's it! Always fetch fresh docs, keep examples minimal, generate complete working code.