fix(extensions/placeholder): Allow emptyNodeClass take a function

[somonek]

Allow setting a different classname per node type in case of complex documents with multiple placeholders, by using a function as emptyNodeClass option for placeholder extension.

Changes Overview

Added option to pass a function to emptyNodeClass

Implementation Approach

Added option to pass a function to emptyNodeClass

Testing Done

Manual testing done

Verification Steps

Pass a function to emptyNodeClass instead of a string, and different classnames per different node types

Additional Notes

NA

Doc update

ueberdosis/tiptap-docs#475

Checklist

• I have created a changeset for this PR if necessary.
• My changes do not break the library.
• I have added tests where applicable.
• I have followed the project guidelines.
• I have fixed any lint issues.

Related Issues

NA

[changeset-bot]

⚠️ No Changeset found

Latest commit: a3783f8

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