I'm confused. Clojure doesn't have Reagent either. ClojureScript does. And Reagent is a pretty straightforward React wrapper, not so different from Rum. What do you think makes it special? Even Rum renders server-side.
The author of the post is the creator of cljfx https://github.com/cljfx/cljfx which basically allows you to use the reagent model to build JavaFx GUIs. I believe that is what parent is referring too.
