ADD: scrolling to active TOC if TOC > viewport.

Scrolling to center active TOC element if TOC content is taller then viewport.
iissnan · Sep 23, 2017 · 619c49e · 619c49e
1 parent 61086aa
commit 619c49e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/source/js/src/post-details.js b/source/js/src/post-details.js
@@ -17,6 +17,9 @@ $(document).ready(function () {
 
         removeCurrentActiveClass();
         $currentActiveElement.addClass('active-current');
+
+        // Scrolling to center active TOC element if TOC content is taller then viewport.
+        $tocElement.scrollTop($currentActiveElement.offset().top - $tocElement.offset().top + $tocElement.scrollTop() - ($tocElement.height() / 2));
       })
       .on('clear.bs.scrollspy', removeCurrentActiveClass);