In my understanding, stdweb aims to only support Rust and thus can be very idiomatic, whereas bindgen aims to more or less be language independent and use webIDL. I don't know if stdweb too is planning to use webIDL in the future.

Bindgen is mentioned regularly in the weekly updates. stdweb is only mentioned once. Is the different treatment of the libraries by accident or by design? Which library do you reccoment for which use case in the short and the long run?