监测是否支持3d

 

 最早来自iscroll的源码里面：

 

https://github.com/cubiq/iscroll/commit/f6778c2618c33d701440d34de8ae2cb599ea5f4a

 

 

function has3d(){
     'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix();
}