Merge branch 'scrollBar' into test

src/js/scrollBar.js

@@ -259,6 +259,8 @@ const $ = require("jquery");
             // 调用scrollTo方法。
             if(self.$scrollDir =="Y"){
               self.scrollTo(self.$cont[0].scrollTop + wheelRange*self.options.wheelStep)
+            }else{
+              self.scrollTo(self.$cont[0].scrollLeft + wheelRange*self.options.wheelStep)
             }
            
             // if(self.$cont[0].scrollTop !==0 ){