Ok, thank you for those references I had not seen. CLOG looks like it creates the UI separately and essentially "streams" it to you over a websocket. While novel, that introduces it own problems. Perhaps this why there aren't any working examples that I could find?
The CL library you linked is for connection to GTK, a desktop UI scheme. So, while interesting, that doesn't really help someone who is trying to develop a browser-native app, which is where the world has gone at the moment.
I think Lisp got left behind on the journey, and I think this UI problem is one of the top reasons, the other one being terrible-non-IDE-like-substances.
The CLOG approach is not that novel. It's the same tech that Laravel Livewire, Rails Hotwire and Phoenix Liveview are pioneering. I mentioned GTK because your original comment hadn't mentioned you needed browser-native functionality specifically. For that, you would be well served with CLOG or you can try something like HTMX with a CL backend that serves just HTML.
I wouldn't go as far as to say CL got left behind in the journey, it's still very much alive. But if you want to go with something with more mainstream appeal (not a bad want IMO) there's always Clojure.
The CL library you linked is for connection to GTK, a desktop UI scheme. So, while interesting, that doesn't really help someone who is trying to develop a browser-native app, which is where the world has gone at the moment.
I think Lisp got left behind on the journey, and I think this UI problem is one of the top reasons, the other one being terrible-non-IDE-like-substances.