F# is a mature, open source, cross-platform, functional-first programming language. It targets not only the .Net platforms, but it is now also possible to transpile into Javascript.
DNN offers multiple ways of developing modules: WebForms, MVC, Razor, HTML-SPAs. This talk shows how to host Fable-Elmish SPAs, written in F#, and how to communicate to your WebApi Controllers, also written in F#. You can even use the same code on server and client side.