How does the C++ command line version work?

[cblc]

I'm not a web developer, so that explains why I'm asking this question. I see that Diagon is written in JS. How does the C++ standalone application invoke the JS code? Is it through a browser invoked from the command line? The question is basically because I would like to use Diagon in my apps, but I have some requirements: the apps must be able to run with no Internet connection, they cannot depend on Python, I cannot bundle a full Javascript interpreter in my apps (that would be way overkill for my small apps), and, to be honest, I'd rather prefer not to depend on web browsers either...

[ArthurSonzogni]

Diagon is written in C++.

I can be used everywhere and portably, including in a web browser via a C++ -> WebAssembly compile step. It is also lightweight (707 KB .deb) and without any runtime dependencies.

Happy to help you if you have questions around using it as a C++ library.