From 2bb6cca0545bafbd1ecfe057edac765127858c4f Mon Sep 17 00:00:00 2001
From: Gaetan SENN <gaetan.senn@gmail.com>
Date: Wed, 21 Oct 2020 10:07:27 +0200
Subject: [PATCH 1/2] Add behaviour support on scroll

Add the possibility to pass behaviour type to window.scrollTo if supported by browser.
---
 src/util/scroll.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/util/scroll.js b/src/util/scroll.js
index d12461e99..e28d69675 100644
--- a/src/util/scroll.js
+++ b/src/util/scroll.js
@@ -160,6 +160,15 @@ function scrollToPosition (shouldScroll, position) {
   }
 
   if (position) {
-    window.scrollTo(position.x, position.y)
+    // $flow-disable-line
+    if ('scrollBehavior' in document.documentElement.style) {
+      window.scrollTo({
+        left: position.x,
+        top: position.y,
+        behavior: shouldScroll.behaviour || 'auto'
+      })
+    } else {
+      window.scrollTo(position.x, position.y)
+    }
   }
 }

From f0cd4dbabfb25c9eb1f7aac00de3b6be21750661 Mon Sep 17 00:00:00 2001
From: Eduardo San Martin Morote <posva13@gmail.com>
Date: Wed, 21 Oct 2020 14:34:41 +0200
Subject: [PATCH 2/2] refactor: typo

---
 src/util/scroll.js | 3 ++-
 types/router.d.ts  | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/util/scroll.js b/src/util/scroll.js
index e28d69675..d1adeb310 100644
--- a/src/util/scroll.js
+++ b/src/util/scroll.js
@@ -165,7 +165,8 @@ function scrollToPosition (shouldScroll, position) {
       window.scrollTo({
         left: position.x,
         top: position.y,
-        behavior: shouldScroll.behaviour || 'auto'
+        // $flow-disable-line
+        behavior: shouldScroll.behavior
       })
     } else {
       window.scrollTo(position.x, position.y)
diff --git a/types/router.d.ts b/types/router.d.ts
index b587bf3e1..ec48c7dca 100644
--- a/types/router.d.ts
+++ b/types/router.d.ts
@@ -86,7 +86,7 @@ export interface NavigationFailure extends Error {
 }
 
 type Position = { x: number; y: number }
-type PositionResult = Position | { selector: string; offset?: Position } | void
+type PositionResult = Position | { selector: string; offset?: Position, behavior?: ScrollBehavior } | void
 
 export interface RouterOptions {
   routes?: RouteConfig[]