[nailer]

Pretty much as you can see. A lot of people want it. It's not done yet.

Obviously Svelte is a JS to JS transformative compiler - you need to make a TS to JS transformative compiler.

I'm hacking on my next app using TypeScript on the backend (particularly around the data layer) and JS/Svelte on the frontend. I would like TS on Svelte, but the rest of Svelte is compelling enough I'd still use it over older tech like React.