patch

layout/includes/layout.pug

@@ -58,7 +58,7 @@ html(lang=config.language)
         if (element.parentNode.tagName !== 'A') {
           const dataSrc = element.getAttribute("data-src")
           const dataCaption = element.title || element.alt || ''
-          utils.wrapElement(element, 'a', { href: dataSrc, 'data-fancybox': '', 'data-caption': dataCaption, 'data-thumb': dataSrc })
+          utils.wrapElement(element, 'a', { href: dataSrc, 'data-fancybox': '', 'data-caption': dataCaption, 'data-thumb': dataSrc , class: "img-wrapper"})
         }
       })
       Fancybox.bind('[data-fancybox]', {});    

source/css/_partials/post_page/markdown_content.styl

@@ -70,6 +70,10 @@
     &:hover
       text-decoration: underline
 
+  .img-wrapper
+    display: contents
+    cursor: zoom-in
+
   img
     display: block
     margin: 20px auto 20px