[psuter]

It is my understanding that QB64 [1] compiles through C++, although I haven't tried it myself. They in theory support a superset of QBasic, and you could compile the C++ generated files using emscripten (again, in theory).

[1] https://en.wikipedia.org/wiki/QB64

[rietta]

They are active on Twitter as well, https://twitter.com/QB64team.