From dbba62e86a0a7abbefe8c2f4cc80ba65060d9c68 Mon Sep 17 00:00:00 2001
From: tristantbg <tristan.bagot@gmail.com>
Date: Wed, 3 Apr 2019 22:15:04 +0200
Subject: [PATCH] Scroll to element that are in bottom of the page

Prevent a brutal stop animation if a targeted element is at the very bottom of the page.
---
 src/jump.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/jump.js b/src/jump.js
index a874be1..f04b18d 100644
--- a/src/jump.js
+++ b/src/jump.js
@@ -32,7 +32,15 @@ const jumper = () => {
   // element offset helper
 
   function top (element) {
-    return element.getBoundingClientRect().top + start
+    // get max scroll value
+    const windowHeight = (window.innerHeight || document.documentElement.clientHeight);
+    const documentHeight = document.body.clientHeight;
+    const max = documentHeight - windowHeight - offset;
+
+    // get element scroll top
+    const top = element.getBoundingClientRect().top + start;
+    
+    return Math.min(element.getBoundingClientRect().top + start, max);
   }
 
   // rAF loop helper