diff --git a/.drone.yml b/.drone.yml
index 6cca8f4..45be869 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -1,12 +1,20 @@
 kind: pipeline
 name: default
 steps:
+  - name: npm-deps
+    image: node
+    commands:
+      - cd reagent-reitit-demo
+      - npm install
+      #- npx shadow-cljs build app
+
   - name: Build
     image: clojure:tools-deps
     commands:
     - cd reagent-reitit-demo
     - cp resources/public/rename-me-index.html resources/public/index.html
-    - clj -A:prod
+    - clj -Mbuild-dev release app
+    #- clj -A:prod
 
   - name: deploy-site
     pull: True
diff --git a/reagent-reitit-demo/deps.edn b/reagent-reitit-demo/deps.edn
index 7893f09..e2f76ae 100644
--- a/reagent-reitit-demo/deps.edn
+++ b/reagent-reitit-demo/deps.edn
@@ -30,4 +30,6 @@
         com.bhauman/figwheel-main {:mvn/version "0.2.18"}}
  :paths ["src" "resources"]
  :aliases {:prod {:main-opts ["-m" "figwheel.main" "-bo" "dev"]}
+           :build-dev {:extra-deps {thheller/shadow-cljs {:mvn/version "2.23.3"}}
+                       :main-opts ["-m" "shadow.cljs.devtools.cli"]}
            :dev {:extra-deps {thheller/shadow-cljs {:mvn/version "2.23.3"}}}}}
diff --git a/reagent-reitit-demo/resources/public/rename-me-index.html b/reagent-reitit-demo/resources/public/rename-me-index.html
index 7182c97..9c9fd8b 100644
--- a/reagent-reitit-demo/resources/public/rename-me-index.html
+++ b/reagent-reitit-demo/resources/public/rename-me-index.html
@@ -26,7 +26,7 @@
     <div id="app">
       loading here
     </div>
-    <script src="/cljs-out/dev-main.js" type="text/javascript"></script>
+    <script src="/cljs-out/main_bundle.js" type="text/javascript"></script>
 
 </body>
 
diff --git a/reagent-reitit-demo/shadow-cljs.edn b/reagent-reitit-demo/shadow-cljs.edn
new file mode 100644
index 0000000..9577acc
--- /dev/null
+++ b/reagent-reitit-demo/shadow-cljs.edn
@@ -0,0 +1,11 @@
+{
+ :deps {:aliases [:dev]}
+ :dev-http {8080 "resources/public/"}
+ :source ["src" "../../components"]
+ :builds {:app {:output-dir "resources/public/cljs-out/"
+                :asset-path "."
+                :target :browser
+                :compiler-options {:infer-externs :auto
+                                   :output-feature-set :es6}
+                :modules {:main_bundle {:init-fn clojure-demo.core/startup!}}
+                :devtools {:after-load app.main/reload!}}}}
diff --git a/reagent-reitit-demo/src/clojure_demo/core.cljs b/reagent-reitit-demo/src/clojure_demo/core.cljs
index 710ec47..85cf505 100644
--- a/reagent-reitit-demo/src/clojure_demo/core.cljs
+++ b/reagent-reitit-demo/src/clojure_demo/core.cljs
@@ -1,6 +1,6 @@
 (ns ^:figwheel-hooks clojure-demo.core
   (:require ["react-dom/client" :refer [createRoot]]
-            ["@codemirror/state" :as cm-state :refer [EditorState] ]
+            ["@codemirror/state" :as cm-state :refer [EditorState Transaction] ]
             ["@codemirror/view" :as cm-view :refer [EditorView ViewUpdate]]
             ["@codemirror/commands" :as cm-commands :refer [defaultKeymap]]
             ["@codemirror/theme-one-dark" :refer [oneDark]]
@@ -59,22 +59,36 @@
 ;(def sci-ctx  (sci/empty-environment))
 (sci/alter-var-root sci/print-fn (constantly *print-fn*))
 
+(defn fetch-selected-text [v transactions]
+  (reduce (fn [text t]
+            (if (= "select.pointer" (str (.annotation t (.-userEvent Transaction) )))
+              (conj text 
+                    (.sliceDoc
+                     ^EditorState (.-state v)
+                     (.-from (.-main (.-selection t)))
+                     (.-to (.-main (.-selection t)))))
+              text))
+          []
+          transactions))
+
 (defn code-editor
   [content]
   (let [editor (atom nil)
         evaled-result (reagent/atom nil)
         update-timeout (reagent/atom nil)
         update-fn (.of (.-updateListener EditorView)
-                       (fn [^ViewUpdate v]
+                       (fn [^ViewUpdate view-update]
                          (js/clearTimeout @update-timeout)
                          (reset! update-timeout
                                  (js/setTimeout
                                   (fn []
-                                    (reset! evaled-result (sci/eval-string* sci-ctx
-                                                                            (.toString (.-doc (.-state v))) #_content ))
-                                    (prn "updated delayed")) 2000))
-                         #_(when  (.-docChanged v)
-                             (prn v))))
+                                    (let [selected-text (fetch-selected-text view-update (.-transactions view-update))
+                                          eval-code (if (seq selected-text)
+                                                      (first selected-text)
+                                                      (.-doc (.-state view-update)))]
+                                      (reset! evaled-result (sci/eval-string* sci-ctx
+                                                                              (.toString eval-code)  ))
+                                      (prn "updated delayed"))) 1000))))
         start-state
         (.create EditorState
                  (clj->js {:doc content