Fulcro + React Native Web (without expo)

core.cljs

(ns demo.fulcro.rnw
  "Set up Fulcro and React Native Web"
  (:require ["react-native-web" :refer [AppRegister]])

(defsc Person [this {:person/keys [name age]}]
  (dom/div
    (dom/p "Name: " name)
    (dom/p "Age: " age)))

(def ui-person (comp/factory Person))

(defsc Root [this props]
  (dom/div
    (dom/div "Hello!")
    (ui-person {:person/name "Lucy" :person/age 29})))
  
(defn register-root-component! [app-name root-component fulcro-app]
  (-> AppRegistry (.registerComponent app-name (fn [] (mroot/floating-root-react-class root-component fulcro-app)))))

(defn run-application! [app-name root-tag]
  (-> AppRegistry (.runApplication app-name (clj->js {:rootTag (.getElementById js/document root-tag)}))))
  
(defn set-root! [app root-component]
  (swap! (::app/state-atom app) #(merge {:fulcro.inspect.core/app-id (comp/component-name root-component)} %))
  (app/set-root! app root-component {:initialize-state? true}))

(defn -mount-app []
  (register-root-component! "App" Root)
  (set-root! app Root)
  (run-application! "App" "app"))
  
(-mount-app)