fix: filter out invalid heading items based on the current block schema in the slash menu #2253

[nperez0111]

Summary

This filters out heading items from the list of slash menu items if the heading item is not actually valid within the current schema.

The items are not valid within the current schema, and therefore should not be presented to the user #2253

Rationale

Changes

Impact

Testing

Screenshots/Video

Checklist

• Code follows the project's coding standards.
• Unit tests covering the new feature have been added.
• All existing tests pass.
• The documentation has been updated to reflect the new feature

Additional Notes

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Updated (UTC)
blocknote	Ready	Preview	Dec 11, 2025 11:05am
blocknote-agent-demo	Error		Dec 11, 2025 11:05am
blocknote-website	Ready	Preview	Dec 11, 2025 11:05am

[pkg-pr-new]

Open in StackBlitz

@blocknote/ariakit

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/ariakit@2259

@blocknote/code-block

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/code-block@2259

@blocknote/core

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/core@2259

@blocknote/mantine

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/mantine@2259

@blocknote/react

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/react@2259

@blocknote/server-util

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/server-util@2259

@blocknote/shadcn

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/shadcn@2259

@blocknote/xl-ai

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/xl-ai@2259

@blocknote/xl-docx-exporter

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/xl-docx-exporter@2259

@blocknote/xl-email-exporter

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/xl-email-exporter@2259

@blocknote/xl-multi-column

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/xl-multi-column@2259

@blocknote/xl-odt-exporter

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/xl-odt-exporter@2259

@blocknote/xl-pdf-exporter

npm i https://pkg.pr.new/TypeCellOS/BlockNote/@blocknote/xl-pdf-exporter@2259

commit: b3840a1