Breaking Changes

The main breaking change is that Node.js 16 is now the minimum supported version.
Across the ecosystem there were several small internal breaking changes. Everything’s released already. You can update all plugins now. If you ran into problems before, it should work now.
We also removed some infrequently used deprecated APIs. You’re likely fine but gloss over the v3 migration guide if you get errors.
Important to note when you use your lesser-known but powerful evaluate, run, or outputFormat: 'function-body' APIs, please pass the baseUrl option. That makes sure import.meta.url, import, and export work. You’ll get a runtime error when those features are used otherwise.

from https://mdxjs.com/blog/v3/

Migration Guide

https://mdxjs.com/migrating/v3/

Tasks