fix: add .js extension to fast-deep-equal ESM import

[nperez0111]

Summary

Fixes the CI failure introduced by d8fb6c2 (Next.js server-util integration test) by adding the .js extension to the fast-deep-equal/es6/react import in @blocknote/react.

Rationale

The fast-deep-equal package has no exports field in its package.json, so Node.js ESM strictly requires the .js file extension to resolve subpath imports. The Next.js test app runs under ESM, causing ERR_MODULE_NOT_FOUND at runtime.

Changes

• Added .js extension to fast-deep-equal/es6/react import in packages/react/src/hooks/useEditorState.ts

Impact

No impact on existing bundler-based consumers (Webpack, Vite, etc.) since they already resolve extensionless imports. This change only affects Node.js ESM resolution, fixing the server-util test.

Testing

• Rebuilt @blocknote/react and verified the dist output contains the corrected import path with .js extension.

Checklist

• Code follows the project's coding standards.
• All existing tests pass.

Summary by CodeRabbit

• Chores
  • Internal dependency path adjustment to ensure proper module resolution.

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Project	Deployment	Actions	Updated (UTC)
blocknote	Ready	Preview	Apr 13, 2026 0:01am
blocknote-website	Ready	Preview	Apr 13, 2026 0:01am

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 3584bdec-b2b6-4214-b2f9-c39dd74e0bd2

📥 Commits

Reviewing files that changed from the base of the PR and between 90b1598 and 1b86baf.

📒 Files selected for processing (1)

• packages/react/src/hooks/useEditorState.ts

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📝 Walkthrough

Walkthrough

Updated the import path for the deepEqual function in the useEditorState hook from fast-deep-equal/es6/react to fast-deep-equal/es6/react.js, resolving the module entry without altering any hook logic or control flow.

Changes

Cohort / File(s)	Summary
Import Path Update packages/react/src/hooks/useEditorState.ts	Updated deepEqual import path to include explicit .js file extension for module resolution.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A tiny tweak, so small and neat,
An import path made more complete,
With .js appended, clear as day,
The module resolves the proper way!
✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and concisely describes the main change—adding .js extension to the fast-deep-equal ESM import to fix a CI failure.
Description check	✅ Passed	The description covers all critical sections: Summary, Rationale, Changes, Impact, and Testing. Non-critical sections like Screenshots and full Checklist items are appropriately omitted or marked as complete.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/fix-next-server-util-ci

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commit: 1b86baf