关于bug收集

1、IOS Safari设置body和html的overflow:hidden不起作用

https://teamtreehouse.com/community/overflow-hidden-not-working-in-ios-safari

2、fixed element scroll 穿透

https://css-tricks.com/forums/topic/prevent-body-scrolling-when-the-user-scrolls-on-fixed-position-div/

http://blog.christoffer.me/six-things-i-learnt-about-ios-safaris-rubber-band-scrolling/