[cmrdporcupine]

Yep. Except that the base semantics of the language really are tuned for JavaScript. So I can't see a separation being feasible between the two.

It would have to be a new language, sharing maybe 90% of syntax etc. but differing in some places where interoperability with JS has forced compromises (base number types is one thing I can think of. I'd like separate int and floats, etc.) and, yeah, targeting WASM etc. And honestly, I'd be game for that. Esp if it came with performance advantages.

[munificent]

What you're describing is essentially the origin story for Dart.

[noveltyaccount]

Yes that's what I meant by proper type system - int, float, decimal... proper date/time/timezone support. To name a few :)