diff --git a/assets/js/app.js b/assets/js/app.js
new file mode 100644
index 0000000..280b896
--- /dev/null
+++ b/assets/js/app.js
@@ -0,0 +1,14 @@
+/*jslint es5: true, indent: 2, browser: true*/
+/*global jQuery: true*/
+
+(function ($) {
+  'use strict';
+
+  $(document).ready(function () {
+   $('#select-command').on('change', function () {
+    $('.command').text($(this).val());
+   });
+  });
+
+})(jQuery);
+
diff --git a/assets/js/app.min.js b/assets/js/app.min.js
new file mode 100644
index 0000000..c5a8c20
--- /dev/null
+++ b/assets/js/app.min.js
@@ -0,0 +1 @@
+!function($){"use strict";$(document).ready(function(){$("#select-command").on("change",function(){$(".command").text($(this).val())})})}(jQuery);
\ No newline at end of file
diff --git a/assets/js/cmd.coffee b/assets/js/cmd.coffee
deleted file mode 100644
index 1e44b46..0000000
--- a/assets/js/cmd.coffee
+++ /dev/null
@@ -1,3 +0,0 @@
-$(document).ready ->
-  $('#select-command').on 'change', ->
-    $('.command').text $(this).val()
diff --git a/assets/js/cmd.min.js b/assets/js/cmd.min.js
deleted file mode 100644
index 6fbda24..0000000
--- a/assets/js/cmd.min.js
+++ /dev/null
@@ -1 +0,0 @@
-(function(){$(document).ready(function(){return $("#select-command").on("change",function(){return $(".command").text($(this).val())})})}).call(this);
\ No newline at end of file
diff --git a/index.html b/index.html
index 4787b9b..5ba8a75 100644
--- a/index.html
+++ b/index.html
@@ -66,6 +66,6 @@
     </div>
     <a href="https://github.com/martinp/ifconfig"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_red_aa0000.png" alt="Fork me on GitHub"></a>
     <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
-    <script src="/assets/js/cmd.min.js"></script>
+    <script src="/assets/js/app.min.js"></script>
   </body>
 </html>