Replaced the blank loading image with HTML trick.

_layouts/post.html

@@ -67,13 +67,9 @@ layout: default
         {% if page.image %}
           <img src="{{ page.image }}">
         {% endif %}
-        <!-- Add lozad class into image tags. see: <https://github.com/ApoorvSaxena/lozad.js#usage> -->
+        <!-- Using lozad. See: <https://github.com/ApoorvSaxena/lozad.js#usage> -->
         {% if content contains '<img src=' %}
-          {% capture loading %}
-           {{ "/assets/img/commons/loading.png" | relative_url }}
-          {% endcapture %}
-          {% assign replacement = '<img src=' | append: loading | append: ' data-src=' %}
-          {{ content | replace: '<img src=', replacement }}
+          {{ content | replace: '<img src=', '<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-src=' }}
         {% else %}
           {{ content }}
         {% endif %}