Looks really nice! Also, super happy that the interactive examples are not super sluggish code sandbox iframes, they're actually usable! A more typescript-first approach would have been nice, or at least typescript/JavaScript toggles, but the React team seems to be aware that that's an area they need to work on.

Yeah we'd like to add TS throughout but it will require some technical and some content work. We didn't want to block the release on that.

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...

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.