I might have misunderstood your comment but I don't think that's what htmx does, it just adds reactivity without needing to write JS, the HTML is represented in the project using Hiccup syntax which is essentially HTML in Clojure data structures - makes sense when code is data is a big part of the Lisp idea. It is an external template file into which you can replace fields, it's just a Clojure file too.