From 0ff36c22bbf3f8de1647abc5b283259917edf065 Mon Sep 17 00:00:00 2001
From: "qingwei.li" <cinwell.li@gmail.com>
Date: Sat, 11 Feb 2017 14:54:02 +0800
Subject: [PATCH] fix(event):  has no effect on a FF mobile browser, fixed #67

---
 CHANGELOG.md | 7 +++++++
 src/event.js | 4 +++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9de3b3a..553df70 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,15 @@
 ## 2.3.0
 
 > 2017-02-11
+
+### Features
+
 - feat(src): add alias feature
 
+### Bug fixes
+- fix(event): `auto2top` has no effect on a FF mobile browser, fixed #67
+
+
 ## 2.2.1
 
 > 2017-02-11
diff --git a/src/event.js b/src/event.js
index 72130cc..b4df387 100644
--- a/src/event.js
+++ b/src/event.js
@@ -135,8 +135,10 @@ export function bindToggle (dom) {
   }
 }
 
+const scrollingElement = document.scrollingElement || document.documentElement
+
 export function scroll2Top (offset = 0) {
-  document.body.scrollTop = offset === true ? 0 : Number(offset)
+  scrollingElement.scrollTop = offset === true ? 0 : Number(offset)
 }
 
 export function sticky () {