From 730411688e98b07aa4bb463da397728ef4323b7b Mon Sep 17 00:00:00 2001
From: Digitroinc <craigbett@gmail.com>
Date: Fri, 9 Mar 2018 04:20:50 -0500
Subject: [PATCH 1/2] Implements issue #2069

Adds smooth scrolling option to scrollBehavior position
---
 src/util/scroll.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/util/scroll.js b/src/util/scroll.js
index cceb03640..1fab10e66 100644
--- a/src/util/scroll.js
+++ b/src/util/scroll.js
@@ -124,6 +124,14 @@ function scrollToPosition (shouldScroll, position) {
   }
 
   if (position) {
-    window.scrollTo(position.x, position.y)
+    if (isObject && shouldScroll.smooth === true) {
+      window.scrollTo({
+        top: position.x,
+        left: position.y,
+        behavior: 'smooth'
+      })
+    } else {
+      window.scrollTo(position.x, position.y)
+    }
   }
 }

From 4f2fa4627095c66b33bbafff5f7ed3fbbd34f11b Mon Sep 17 00:00:00 2001
From: Digitroinc <craigbett@gmail.com>
Date: Fri, 9 Mar 2018 05:21:14 -0500
Subject: [PATCH 2/2] Allows user to pass behaviour string with fallback

---
 src/util/scroll.js | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/util/scroll.js b/src/util/scroll.js
index 1fab10e66..61375c93b 100644
--- a/src/util/scroll.js
+++ b/src/util/scroll.js
@@ -124,12 +124,9 @@ function scrollToPosition (shouldScroll, position) {
   }
 
   if (position) {
-    if (isObject && shouldScroll.smooth === true) {
-      window.scrollTo({
-        top: position.x,
-        left: position.y,
-        behavior: 'smooth'
-      })
+    const docEl: any = document.documentElement
+    if ('scrollBehavior' in docEl.style) {
+      window.scrollTo({ top: position.y, left: position.x, behavior: isObject && typeof shouldScroll.behavior === 'string' ? shouldScroll.behavior : 'auto' })
     } else {
       window.scrollTo(position.x, position.y)
     }