const duration = 300;
const timingFun = "ease";
const width = 0;

var ani_width = function(duration,timingFunc,width){
   if (undefined != duration){
      this.duration = duration;
   }
   if (undefined != timingFun) {
      this.timingFun = timingFun;
   }
   if (undefined != width) {
      this.width = width;
   }

   var animation = wx.createAnimation({
      duration: duration,
      timingFunction: timingFunc
   });
   animation.width(width).step();
   return animation.export();
}

module.exports = {
   ani_width: ani_width
}