[johtso]

The sexiest example I've seen is in the XState docs.. not sure what they're using to get the types into the tooltips.. https://stately.ai/docs/xstate/running-machines/react#usemac...

[nawgz]

Looks like Shiki: https://github.com/shikijs/shiki

If you "inspect" the elements with the mouseovers, you can see they statically compiled the TS definition into the HTML.

I guess it probably uses the same APIs to read the types VSCode does, given what they state the purpose of Shiki is.

[afidrya]

It's Docusaurus 2 + TwoSlash: https://docusaurus.io/blog/2022/08/01/announcing-docusaurus-...