From 31ccc0a1e13bdf2d10375f2276d429b08c6d887e Mon Sep 17 00:00:00 2001
From: Alexander Parkhomenko <arikito.91@gmail.com>
Date: Tue, 10 Apr 2018 12:03:09 +0300
Subject: [PATCH] Update scrollspy.js

Included offsetTop option
---
 src/js/modules/scrollspy.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/js/modules/scrollspy.js b/src/js/modules/scrollspy.js
index ae17cac..5e9d975 100644
--- a/src/js/modules/scrollspy.js
+++ b/src/js/modules/scrollspy.js
@@ -12,6 +12,8 @@ function ScrollSpy (wrapper, opt) {
   this.className = opt.className;
 
   this.callback = opt.callback;
+  
+  this.offsetTop = opt.offsetTop;
 
   this.init();
 }
@@ -109,7 +111,7 @@ ScrollSpy.prototype.isInView = function (el) {
     scrollBottom = scrollTop + winH,
     rect = el.getBoundingClientRect(),
     elTop = rect.top + scrollTop,
-    elBottom = elTop + el.offsetHeight;
+    elBottom = elTop + el.offsetHeight - this.offsetTop;
 
   return (elTop < scrollBottom) && (elBottom > scrollTop);
 };