re-render

(defn ifr []
  (reagent/create-class {:component-did-mount #(do
                                                 (utils/log "iframe did mount")
                                                 (rf/dispatch [:run]))
                         :reagent-render      (fn []
                                                (let [a @(rf/subscribe [:editors/iframe-update])]
                                                  [:iframe {:id                "result-iframe"
                                                            ;:a                 a
                                                            :name              (str "result-iframe" a)
                                                            :class             "iframe-result"
                                                            :sandbox           "allow-scripts allow-pointer-lock allow-same-origin allow-popups allow-modals allow-forms"
                                                            :allowTransparency "true"
                                                            :allowFullScreen   "true"}]))}))