Make a ClojureScript object accessible as a JavaScript object without converting it

proxy.cljs

;; https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
(defn proxy [m]
  (js/Proxy. m #js {:get (fn [target prop]
                           (let [prop' (if (vector? target)
                                        (js/parseInt prop)
                                        (keyword prop))]
                             (let [v (or (get target prop')
                                         (get target prop))]
                               (if (coll? v)
                                 (proxy v)
                                 v))))}))

(comment
  (def deeply-nested {:a {:b [{:c {:d 1}}]}})

  (-> (proxy deeply-nested)
    (aget "a")
    (aget "b")
    (aget 0)
    (aget "c")
    (aget "d")) ;; => 1
  )