Then F# it is. :)

Rust was partially inspired by F# and OCaml and actually had a much more ML-like syntax early on. Probably something similar goes for Typescript. And actually, the same for Gleam as well.

F# doesn't really relate to Haskell at all. They are very different languages. F# is a multiparadigm language that easily supports concise code in the imperative, OOP, and functional styles.

It sounds like you maybe don't know much about F# if you think it's like Haskell, which is okay. But that's also why I would recommend checking it out.

F# is not Haskell at all. If you want to write non functional code you can. It's functional first but it has side effects, mutable variables and a host of features you get in other languages. I really recommend trying it.

I use ReScript for this. Bindings for node are very complete and for deno they're enough for the most common uses.

+1 to this.

Love Rust and everything about it.

However, to script something small/casual I would like all the rest of Rust but with automatic garbage collection, without having to worry about lifetimes.

Not practically.

There are some one-person attempts at compilers from F#/OCaml to BEAM, but they haven’t seen an update for some years.

Caramel is a very similar language (ML dialect) that builds for BEAM.

https://caramel.run/