WeChat Mini Programs login problem

what does the code circled in the following picture mean?

Feb.26,2021

means literally and should be read together with app.js.

app.js
// 
    wx.getSetting({
      success: res => {
        if (res.authSetting['scope.userInfo']) {
          //  getUserInfo 
          wx.getUserInfo({
            success: res => {
              //  res  unionId
              this.globalData.userInfo = res.userInfo

              //  getUserInfo  Page.onLoad 
              //  callback 
              if (this.userInfoReadyCallback) {
                this.userInfoReadyCallback(res)
              }
            }
          })
        }
      }
    })

if the wx.getUserInfo in app.js has not been returned, add a method userInfoReadyCallback to app.
take a look at app.js:
if (this.userInfoReadyCallback) {

this.userInfoReadyCallback(res)
This method is executed in the

}
wx.getUserInfo callback, and userInfoReadyCallback uses the arrow function, so this points to the current page.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-7c2f97-29051.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-7c2f97-29051.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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