[MajimasEyepatch]

That kind of other-language-to-JS stuff works great for small, one-man projects that never go to production. Unfortunately, other than TypeScript, none of these solutions have really achieved critical mass, and they all fizzle out after a few years, leaving you with a horrible mess to clean up. You have layers and layers of indirection, and you don't know whether your problem is your code, or a Python library, or the Python-to-JS layer, or one of the JS libraries, and no one on the Internet can help you because your stack is completely bespoke.

I applaud you trying to make it easier for people to get started, but throwing them on top of this Tower of Babel and pretending it will never come crumbling down into a mess of inconsistent languages and libraries is a recipe for pain. TypeScript is not that hard. If you're teaching beginners how to build a web front end, just start with that, and let them use either TypeScript or Python on the back end, depending on how ambitious they are.