code refactoring

_includes/head.html

@@ -118,7 +118,10 @@
       image: "{{page.image.path}}",
       createdDate: "{{page.date}}",
       modifiedDate: "{{page.last_modified_at | strip}}",
-      blogUrl: "{{site.url}}{{site.baseurl}}"
+      blogUrl: "{{site.url}}{{site.baseurl}}",
+      views: 0,
+      likes: 0,
+      comments: 0
     };
 
   function liquidArrayToJsonArray(){