fix: add comments

Author: daya

layout/_third-party/comments/disqus.swig

@@ -28,8 +28,12 @@
             loadComments();
           } else {
             $(window).on('scroll.disqus_scroll', function () {
+              // offsetTop may changes because of manually resizing browser window or lazy loading images.
+              var offsetTop = $('#comments').offset().top - $(window).height();
               var scrollTop = $(window).scrollTop();
-              if (scrollTop >= offsetTop) {
+
+              // pre-load comments a bit? (margin or anything else)
+              if (offsetTop - scrollTop < 60) {
                 $(window).off('.disqus_scroll');
                 loadComments();
               }