Umbraco Tiptap Extension

What is it?

A Tiptap Extension adds functionality to Umbraco's Rich Text Editor (which is built on Tiptap). Extensions can add new node types (like custom blocks), marks (like custom formatting), or other editor capabilities. The extension API provides the underlying Tiptap extensions that get registered with the editor.

Documentation

Always fetch the latest docs before implementing:

• Extension Types: https://docs.umbraco.com/umbraco-cms/customizing/extending-overview/extension-types
• Rich Text Editor: https://docs.umbraco.com/umbraco-cms/fundamentals/backoffice/property-editors/built-in-umbraco-property-editors/rich-text-editor
• Tiptap Docs: https://tiptap.dev/docs/editor/extensions/overview
• Foundation: https://docs.umbraco.com/umbraco-cms/customizing/foundation

Related Skills

• Tiptap Toolbar Extension: For adding toolbar buttons

  • Reference skill: umbraco-tiptap-toolbar-extension

• Tiptap Statusbar Extension: For adding statusbar elements

  • Reference skill: umbraco-tiptap-statusbar-extension

Workflow

1. Fetch docs - Use WebFetch on the URLs above
2. Ask questions - What functionality? Node, Mark, or Extension? Custom styles needed?
3. Generate files - Create manifest + API class based on latest docs
4. Explain - Show what was created and how to test

Minimal Examples

Manifest (manifests.ts)

import type { ManifestTiptapExtension } from '@umbraco-cms/backoffice/extension-registry';

const manifest: ManifestTiptapExtension = {
  type: 'tiptapExtension',
  alias: 'My.TiptapExtension.Highlight',
  name: 'Highlight Extension',
  api: () => import('./highlight.tiptap-api.js'),
  meta: {
    icon: 'icon-marker',
    label: 'Highlight',
    group: 'formatting',
  },
};

export const manifests = [manifest];

Extension API (highlight.tiptap-api.ts)

import { UmbTiptapExtensionApiBase } from '@umbraco-cms/backoffice/tiptap';
import type { UmbTiptapExtensionArgs } from '@umbraco-cms/backoffice/tiptap';
import Highlight from '@tiptap/extension-highlight';

export default class HighlightTiptapExtensionApi extends UmbTiptapExtensionApiBase {
  getTiptapExtensions(args?: UmbTiptapExtensionArgs) {
    return [
      Highlight.configure({
        multicolor: true,
      }),
    ];
  }
}

Custom Node Extension

import { UmbTiptapExtensionApiBase } from '@umbraco-cms/backoffice/tiptap';
import { Node } from '@tiptap/core';

export default class CalloutTiptapExtensionApi extends UmbTiptapExtensionApiBase {
  getTiptapExtensions() {
    const CalloutNode = Node.create({
      name: 'callout',
      group: 'block',
      content: 'block+',

      addAttributes() {
        return {
          type: {
            default: 'info',
          },
        };
      },

      parseHTML() {
        return [{ tag: 'div[data-callout]' }];
      },

      renderHTML({ HTMLAttributes }) {
        return ['div', { 'data-callout': '', ...HTMLAttributes }, 0];
      },
    });

    return [CalloutNode];
  }
}

Custom Mark Extension

import { UmbTiptapExtensionApiBase } from '@umbraco-cms/backoffice/tiptap';
import { Mark } from '@tiptap/core';

export default class CustomMarkTiptapExtensionApi extends UmbTiptapExtensionApiBase {
  getTiptapExtensions() {
    const CustomMark = Mark.create({
      name: 'customHighlight',

      addAttributes() {
        return {
          color: {
            default: 'yellow',
          },
        };
      },

      parseHTML() {
        return [{ tag: 'mark' }];
      },

      renderHTML({ HTMLAttributes }) {
        return ['mark', { style: `background-color: ${HTMLAttributes.color}` }, 0];
      },
    });

    return [CustomMark];
  }
}

Extension with Custom Styles

import { UmbTiptapExtensionApiBase } from '@umbraco-cms/backoffice/tiptap';
import { css } from '@umbraco-cms/backoffice/external/lit';
import Highlight from '@tiptap/extension-highlight';

export default class StyledHighlightApi extends UmbTiptapExtensionApiBase {
  getTiptapExtensions() {
    return [Highlight];
  }

  // Custom styles for the editor
  getStyles() {
    return css`
      mark {
        background-color: yellow;
        padding: 0.1em 0.2em;
        border-radius: 2px;
      }
    `;
  }
}

Using Configuration from Property Editor

import { UmbTiptapExtensionApiBase } from '@umbraco-cms/backoffice/tiptap';
import type { UmbTiptapExtensionArgs } from '@umbraco-cms/backoffice/tiptap';
import Highlight from '@tiptap/extension-highlight';

export default class ConfigurableHighlightApi extends UmbTiptapExtensionApiBase {
  getTiptapExtensions(args?: UmbTiptapExtensionArgs) {
    // Access data type configuration
    const multicolor = args?.configuration?.getValueByAlias('multicolor') ?? false;

    return [
      Highlight.configure({
        multicolor,
      }),
    ];
  }
}

Meta Properties

Property	Description
icon	Icon shown in configuration UI
label	Display name
group	Group for organizing extensions
description	Optional description

Common Extension Groups

• formatting - Text formatting (bold, italic, etc.)
• structure - Structural elements (headings, lists, etc.)
• media - Media elements (images, embeds, etc.)
• misc - Other functionality

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