Listing 3.8: click() instead of on('click').

Chapter 3/03.js

@@ -1,8 +1,12 @@
 $(document).ready(function () {
   'use strict';
   $('#switcher-default').addClass('selected');
-  
-  $('#switcher button').on('click', function () {
+
+  // Automatic handler names available for (jQuery 1.9.0):
+  // blur focus focusin focusout load resize scroll unload click dblclick.
+  // mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave
+  // change select submit keydown keypress keyup error contextmenu.
+  $('#switcher button').click(function () {
     var bodyClass = this.id.split('-')[1];
 
     $('body').removeClass().addClass(bodyClass);