Maybe because TypeScript is not valid JavaScript (yet)? If you don't strip types, your code doesn't work.
It depends on the runtime: Node can run Typescript because it automatically strips types (which is so convenient during development).
But in browser, for now only the more limited JSDoc-style types can be shipped as-is indeed.
alt Hacker News
It depends on the runtime: Node can run Typescript because it automatically strips types (which is so convenient during development).
But in browser, for now only the more limited JSDoc-style types can be shipped as-is indeed.