自学系列（零基础学小程序）---小程序实现简单的倒计时

 [JavaScript] 
//index.js  

// 从从60到到0倒计时  

function countdown(that) {  

 var second = that.data.second  

 if (second == 0) {  

  that.setData({  

   second: "60秒倒计时结束"  

  });  

  return ;  

 }  

 var time = setTimeout(function(){  

  that.setData({  

   second: second - 1  

  });  

  countdown(that);  

 }  

 ,1000)  

}  

   

Page({  

  data: {  

    second: 60  

  },  

  onLoad: function() {  

    countdown(this);  

  }  

});