cljs.js/load-macros

(defn load-macros [bound-vars k macros reload reloads opts cb]
  (if (seq macros)
    (let [nsym (first (vals macros))
          k    (or (k reload)
                   (get-in reloads [k nsym])
                   (and (= nsym name) (:*reload-macros* bound-vars) :reload))]
      (require bound-vars nsym k
        (-> opts
          (assoc :macros-ns true)
          (dissoc :context)
          (dissoc :ns))
        (fn [res]
          (if-not (:error res)
            (load-macros bound-vars k (next macros) reload reloads opts cb)
            (cb res)))))
    (cb {:value nil})))