1. Pass value through url
   First, call a click to detail method, mainly through wx.navigateTo of wechat API

toDetail: function(e){
    var index = e.currentTarget.dataset.index;        //Get subscript
    var title = this.data.listDatas[index].title;     //Get title
    wx.navigateTo({                                   //Keep this page and jump to another page
      url: '/pages/detail/detail?title='+title,       //Pass url + value
    })
  }

Then the details page receives the value

 onLoad: function (options) {
    var title=options.title;
    console.log('details'+title);
  }

1. Pass values by setting global variables
   Set a global variable host in app.js

App({
  onLaunch: function () {
  },
  globalData: {
    userInfo: null,
    host:'http://www.xzylogic.xyz/wx_Json_Img/bdy.json',
  }
})

Then reassign in the method of jump details

 toDetail: function(e){
    var index = e.currentTarget.dataset.index;        //Get subscript
    var title = this.data.listDatas[index].title;     //Get title
    const app=getApp();                               //Get app
    app.globalData.host=title;                        /Copy the global variable again, and then extract the value in details
    console.log(title);
  }

1. According to Tencent officials, the local cache can be set to 10MB
   First pass the value, and call Tencent's APIwx.setStorage

// toDetail: Specifies the binding method on the wxml page
  toDetail: function(e){
    var index = e.currentTarget.dataset.index;        //Get subscript
    var title = this.data.listDatas[index].title;     //Get title
    wx.setStorage({                                   //Set local cache
      key: "title",
      data: title
    })
     wx.navigateTo({                                   //Keep this page and jump to another page
     url: '/pages/detail/detail',                       //url + value of page path
     })
  },

Then get the cache in detail

onLoad: function (options) {
    wx.getStorage({
      key: 'title',
      success: function(res) {
        var title=res.data;
        console.log('Value obtained: '+title);
      },
    })
  }