原文：

Add -webkit-transform: translateZ(0) to the position: fixed element. This forces Chrome to use hardware acceleration to continuously paint the fixed element and avoid this bizarre behavior.

I created a Chrome bug for this . Please star it so this can get some attention.

 

也就是为样式添加translateZ(0)属性强制开启硬件加速，为了兼容各个平台，需要写成

.test{
       position:fixed;    -webkit-transform: translateZ(0);    -moz-transform: translateZ(0);    -ms-transform: translateZ(0);    -o-transform: translateZ(0);    transform: translateZ(0);}