Is it possible to make custom JavaScript class implementions known to PyCharm's class search?

I'm working on a project that is using some obscure custom javascript class implementation. It basicalls consists of type("classname", ...) calls to define a new class. classname is then available globally.

Is it somehow possible to make pycharm's autocompletion/class search understand this?

Maybe with a plugin? If yes, how complicated would it be? I have some java knowledge but never looked at the plugin APIs etc. yet.