umbraco-global-context

name	umbraco-global-context
description	Implement global contexts in Umbraco backoffice using official docs
version	1.0.0
location	managed
allowed-tools	Read, Write, Edit, WebFetch

Umbraco Global Context

What is it?

Global contexts create a shared, type-safe layer of data and functions accessible throughout the backoffice. Unlike scoped contexts (like Workspace Contexts), global contexts persist for the entire backoffice session. Use them for sharing state between extensions, managing centralized services, or coordinating communication. Note: Prefer more specific context types when possible - Umbraco uses global contexts sparingly.

Documentation

Always fetch the latest docs before implementing:

• Main docs: https://docs.umbraco.com/umbraco-cms/extend-your-project/backoffice-extensions/extending-overview/extension-types/global-context
• Context API: https://docs.umbraco.com/umbraco-cms/extend-your-project/backoffice-extensions/foundation/context-api
• Foundation: https://docs.umbraco.com/umbraco-cms/extend-your-project/backoffice-extensions/foundation
• Extension Registry: https://docs.umbraco.com/umbraco-cms/extend-your-project/backoffice-extensions/extending-overview/extension-registry

Related Foundation Skills

• Context API: For understanding context consumption patterns

  • Reference skill: umbraco-context-api

• State Management: For reactive state within contexts

  • Reference skill: umbraco-state-management

Workflow

1. Fetch docs - Use WebFetch on the URLs above
2. Ask questions - What state to share? What services needed? Could a workspace context work instead?
3. Generate files - Create context token + implementation + manifest based on latest docs
4. Explain - Show what was created and how to consume the context

Minimal Examples

Context Token (my-global-context.token.ts)

import { UmbContextToken } from '@umbraco-cms/backoffice/context-api';
import type { MyGlobalContext } from './my-global-context.js';

export const MY_GLOBAL_CONTEXT = new UmbContextToken<MyGlobalContext>(
  'My.GlobalContext'
);

Context Implementation (my-global-context.ts)

import { UmbContextBase } from '@umbraco-cms/backoffice/class-api';
import type { UmbControllerHost } from '@umbraco-cms/backoffice/controller-api';
import { MY_GLOBAL_CONTEXT } from './my-global-context.token.js';

export class MyGlobalContext extends UmbContextBase {
  #currentValue = '';

  constructor(host: UmbControllerHost) {
    super(host, MY_GLOBAL_CONTEXT);
  }

  getValue(): string {
    return this.#currentValue;
  }

  setValue(value: string): void {
    this.#currentValue = value;
  }
}

Manifest (umbraco-package.json)

{
  "name": "My Global Context Package",
  "extensions": [
    {
      "type": "globalContext",
      "alias": "My.GlobalContext",
      "name": "My Global Context",
      "js": "/App_Plugins/MyPackage/my-global-context.js"
    }
  ]
}

Consuming the Context

import { UmbElementMixin } from '@umbraco-cms/backoffice/element-api';
import { MY_GLOBAL_CONTEXT } from './my-global-context.token.js';

class MyElement extends UmbElementMixin(LitElement) {
  #myContext?: MyGlobalContext;

  constructor() {
    super();
    this.consumeContext(MY_GLOBAL_CONTEXT, (instance) => {
      this.#myContext = instance;
    });
  }
}

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