I’m looking for a way to replace the URL popup with a custom implementation so users can select a file on the server and the link for that file is used in the URL. Server backend is not a problem, but where do I start with prosemirror? Can this be done somehow?
The core library doesn’t come with a URL popup (unless you mean the prompt provided by the prosemirror-menu package), so while this should definitely be doable, you’ll first have to figure out which URL popup extension you are running.