为什么打印出来的data是非法操作？

Question

代码：login: function(){    wx.login({      success:function(res){        console.log(res.code)        wx.request({          url:'https://xiaoyuan.0319zp.cn/interface .php/home/index/login',          数据:{ js_code:res.code},          标头:{            'content-type' : 'application/json'          },           成功:function(res){            console.log(资源数据)          }        })      }    })  }