[fivea]

> Yes, but I'd argue that is an implementation detail. You can directly run a TypeScript file like this `deno run helloWorld.ts`.

Why yes, you can run directly Typescript code in Node (well, at least just as direct as Deno, as it transpiles TS to JS) with the likes of ts-node.

https://www.npmjs.com/package/ts-node

[nitsky]

Then it would be fair to say ts-node is a typescript runtime, while node is a javascript runtime.