Would it be possible to add support for MDX exports or admonitions?

[mmcdermott]

I think you could do so in the line below, and the plugins exist for it, I think:

Line:

react-jupyter-notebook/src/lib/BlockSource.tsx

Line 110 in deddebc

remarkPlugins={[RemarkGFM, RemarkMath]}

Plugins: https://github.com/mdx-js/mdx/tree/main/packages/remark-mdx, https://github.com/elviswolcott/remark-admonitions