Tiptap RTE: Fix Clear Formatting errors when HTML attribute extensions aren't enabled (closes #22502)

[AndyButland]

Prerequisites

• I have added steps to test this contribution in the description below

Fixes #22502

Description

The "Clear Formatting" toolbar button in the TipTap RTE throws a TypeError on click when the HtmlAttributeClass or HtmlAttributeStyle extensions are not enabled on the data type:

clear-formatting.tiptap-toolbar-api.ts:6 Uncaught TypeError: e?.chain(...).focus(...).clearNodes(...).unsetAllMarks(...).unsetClassName is not a function

Root cause

The "Clear Formatting" toolbar API calls .unsetClassName() and .unsetStyles() — custom chain commands provided by Umb.Tiptap.HtmlAttributeClass and Umb.Tiptap.HtmlAttributeStyle respectively. These extensions used to be bundled into "Rich Text Essentials" (guaranteed to be present) but were unbundled into separate opt-in extensions in #20042 (Sep 2025). Users whose saved toolbar still contains "Clear Formatting" after the upgrade — but whose data type doesn''t opt into both underlying extensions — hit the TypeError because the chain commands simply don''t exist.

Fix

Invoke unsetClassName and unsetStyles via a custom Tiptap command using optional chaining on commands.*. When the HTML-attribute extensions aren''t registered, those calls silently no-op, while clearNodes() and unsetAllMarks() (core commands) always run. No manifest dependency is declared — the button stays available regardless of which HTML-attribute extensions are opted into, and degrades gracefully.

Behaviour after the fix

• Users with both HTML-attribute extensions enabled: no change — button clears nodes, marks, classes and inline styles.
• Users missing one or both extensions: button clears nodes and marks; class/style unset steps no-op safely (there''s nothing to clear). No TypeError.

Testing

1. Create a Data Type using the TipTap Rich Text Editor.
2. Without enabling the `class` attributes or `style` attributes extensions, add "Clear Formatting" to the toolbar.
3. Apply formatting to a content item → click Clear Formatting → nodes and marks are cleared, no console errors.
4. Enable the `class` attributes and `style` attributes extensions, add classes/inline styles to content → click Clear Formatting → classes and inline styles are also cleared.

[Copilot]

Pull request overview

Fixes a TipTap RTE runtime error by declaring the extension dependencies for the “Clear Formatting” toolbar button so it is disabled/hidden when the required HTML-attribute extensions are not enabled on the data type.

Changes:

• Add forExtensions dependency declarations to the Clear Formatting toolbar manifest to require Umb.Tiptap.HtmlAttributeClass and Umb.Tiptap.HtmlAttributeStyle.

[leekelleher]

Thanks @AndyButland. I reworked the Clear Formatting code to conditionally call the unset class and style attribute methods. This way we can avoid the hard dependency on those 2 extensions in the UI.