Fixed a issue when script was loaded before jquery

js/christmas.js

@@ -17,18 +17,29 @@ if (new Date().getMonth() === 11) {
 
     // Wait for the snowfall script and jQuery to load
     window.addEventListener('load', function () {
-        $(document).snowfall({
-            flakeCount: ($(document).width() > 992 ? 500 : 100),
-            flakeIndex: -1,
-            minSize: 4,
-            maxSize: 5,
-            minSpeed: 1,
-            maxSpeed: 2,
-            round: true,
-            shadow: true
-        });
+        defer(proceedWithJquery);
+    });
+}
 
-        // Change background artist in the footer
-        $('#background-artist').html('<a href="http://www.publicdomainpictures.net/view-image.php?image=28562&picture=christmas-bulbs-red-background">Debi Geroux - Public Domain</a>');
+function defer(method) {
+    if (window.jQuery)
+        method();
+    else
+        setTimeout(function() { defer(method) }, 50);
+}
+
+function proceedWithJquery() {
+    $(document).snowfall({
+        flakeCount: ($(document).width() > 992 ? 500 : 100),
+        flakeIndex: -1,
+        minSize: 4,
+        maxSize: 5,
+        minSpeed: 1,
+        maxSpeed: 2,
+        round: true,
+        shadow: true
     });
+
+    // Change background artist in the footer
+    $('#background-artist').html('<a href="http://www.publicdomainpictures.net/view-image.php?image=28562&picture=christmas-bulbs-red-background">Debi Geroux - Public Domain</a>');
 }