Pretty much every article on the Internet states that Svelte doesn't support Typescript. The community points this out as the largest disadvantage (comparing to React, Vue, and Angular).
Anybody who worked with Big 3 frameworks knows how easy it gets with DevTools. A lot of criticism Svelte had was due to lack of DevTools. No more
You know it's new and so on. But look at these numbers, it's breathing down angular's neck!