diff --git a/README.md b/README.md
index ee8c51a..d006f61 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,13 @@ $ cljs watch sitegen
 $ node target/sitegen.js
 ```
 
+Build client-side code:
+
+```
+$ cljs watch client
+$ cljs watch interactive
+```
+
 To publish the site to the [GitHub Pages deployment repo](https://github.com/cljs/cljs.github.io):
 
 ```
diff --git a/cljs.edn b/cljs.edn
index 81c656e..7aab049 100644
--- a/cljs.edn
+++ b/cljs.edn
@@ -10,6 +10,10 @@
                    :compiler {:main "client.core"
                               :output-to "output/js/client.js"
                               :optimizations :advanced}}
+          :interactive {:src "src"
+                        :compiler {:main "client.interactive"
+                                   :output-to "output/js/interactive.js"
+                                   :optimizations :advanced}}
           :server {:src "src"
                    :compiler {:target :nodejs
                               :main "server.core"
diff --git a/src/client/interactive.cljs b/src/client/interactive.cljs
new file mode 100644
index 0000000..5b08ae8
--- /dev/null
+++ b/src/client/interactive.cljs
@@ -0,0 +1,3 @@
+(ns client.interactive)
+
+(js/console.log "Interactive !")
diff --git a/src/sitegen/api_pages.cljs b/src/sitegen/api_pages.cljs
index 41840d9..6919a8c 100644
--- a/src/sitegen/api_pages.cljs
+++ b/src/sitegen/api_pages.cljs
@@ -479,7 +479,8 @@
 
 (defn create-sym-page! [{:keys [ns name-encode] :as sym}]
   (->> (sym-page sym)
-       (common-layout {:head {:title (str "CLJS - " (docname-display (:full-name sym)))}})
+       (common-layout {:head {:title (str "CLJS - " (docname-display (:full-name sym)))}
+                       :interactive true})
        (hiccup/render)
        (urls/write! (urls/api-sym ns name-encode))))
 
diff --git a/src/sitegen/layout.cljs b/src/sitegen/layout.cljs
index 6685152..a170869 100644
--- a/src/sitegen/layout.cljs
+++ b/src/sitegen/layout.cljs
@@ -5,6 +5,7 @@
 (declare head)
 (declare body-header)
 (declare body-footer)
+(declare interactive)
 
 (defn common-layout [opts content]
   [:html
@@ -14,7 +15,8 @@
         (body-header)
         content
         (body-footer)]
-      [:script {:src "/js/client.js"}]]])
+      [:script {:src "/js/client.js"}]
+      (interactive (:interactive opts))]])
 
 (defn sidebar-layout [& columns]
   (case (count columns)
@@ -90,3 +92,7 @@
         [:a {:href "http://opensource.org/licenses/eclipse-1.0.php"} "EPL 1.0"]
         [:br]
         "Copyright © Rich Hickey"]]])
+
+(defn interactive [is-interactive]
+  (when is-interactive
+    [:script {:src (str "/js/interactive.js")}]))