From 9956896401adf13cb1af02613fbc2e3e361f9326 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=BA=B8=E4=B8=8A=E6=89=AB=E9=9B=B7?= <zcyzcy88888@126.com>
Date: Mon, 20 Feb 2017 10:53:35 +0800
Subject: [PATCH] Fix

---
 examples/components/header.vue | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/components/header.vue b/examples/components/header.vue
index 3dea6096..e66138a8 100644
--- a/examples/components/header.vue
+++ b/examples/components/header.vue
@@ -259,7 +259,7 @@
       scroll(() => {
         if (this.isHome) {
           const threshold = 200;
-          let alpha = Math.min(document.body.scrollTop, threshold) / threshold;
+          let alpha = Math.min((document.documentElement.scrollTop || document.body.scrollTop), threshold) / threshold;
           this.$refs.header.style.backgroundColor = `rgba(32, 160, 255, ${ alpha })`;
         }
       });