Technically Deno supports TS and I assume that is a transpilation step to JS. Not sure if they use TSC or their own “compiler” however. But it is baked into Deno at some point.
Relevant:
> I'm just going to be explicit. In 2020, Henry created 12 issues, commented 25 times, and created 29 pull requests. This is across all Babel orgs.
Babel, Rome, Deno, are all transpilers the tech isn't as unique as it once was. Things come and go in JS land, and Babel will go the way of Dodo.js