From ba19987cdb2f6b5ef606dd0ca3b49de6872484c6 Mon Sep 17 00:00:00 2001
From: ruanyf <yifeng.ruan@gmail.com>
Date: Wed, 14 Oct 2015 18:51:59 +0800
Subject: [PATCH] scroll listener using window.requestAnimationFrame

---
 js/ditto.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/js/ditto.js b/js/ditto.js
index d2d96cc..fa4a620 100644
--- a/js/ditto.js
+++ b/js/ditto.js
@@ -286,8 +286,10 @@ function router() {
             var sHeight = h - wh;
 
             $w.on('scroll', function() {
+              window.requestAnimationFrame(function(){
                 var perc = Math.max(0, Math.min(1, $w.scrollTop() / sHeight));
                 updateProgress(perc);
+              });
             });
 
             function updateProgress(perc) {