微信小程序报错：thirdScriptError 求解决方案。

Question

#错误提示：thirdScriptError：
Cannot read property 'songlist' of undefined;at api request success callback function
TypeError: Cannot read property 'songlist' of undefined
#源代码：

// pages/list/list.js
var config = require('../../config.js');

var formatSeconds = function(value) {
  var time = parseFloat(value);
  var m = Math.floor(time / 60);
  var s = time - m * 60;

  return [m, s].map(formatNumber).join(':');

  function FormatNumber(n) {
    n = n.toString()
    return n[1] ? n : '0' + n
  }
}

Page({
  data: {
    board: '',
    songlist: [],
    loading: false,
  },
  onLoad: function(options) {
    var self = this;
    var topid = options.type;

    this.setData({
      loading: true
    })

    wx: wx.request({
      url: config.config.hotUrl,
      data: {
        topid: topid
      },
      success: function(e) {
        if (e.statusCode == 200) {
          var songlist = e.data.showapi_res_body_pagebean.songlist;

          for (var i = 0; i < songlist.length; i++) {
            songlist[i].seconds = formatSeconds(songlist[i].seconds);
          }
          self.setData({
            board: e.data.showapi_res_body_pagebean.songlist[0].albumpic_big,
            songlist: songlist,
            loading: false
          });

          wx.setStorageSync('songlist', songlist);
        }
      }
    });
  }

})

Answer 1

如果需要补充本文件其他源代码的直接告诉我，需要哪一部分。