How can wepy get the app instance in a js file?

question 1:
the wepy document says that in the Page page instance, the App instance can be accessed through this.$parent. What should I do if I want to access an app instance in a js? 

wepy.login({
  success: function({ code }) { 
    ajax("user/login", {
      code
    }).then(res => {
      if (res) {
        wx.setStorageSync("user_id", res.user_id)
        wx.setStorageSync("auth_token", res.auth_token)
      }
      // res.store_id  res.store_nameapp.globalData
      getDefaultStore().then(res => {
        fn()
      })
    })
  }
})

question 2:
wepy document says:
/ / how to use WePY, you need to enable Promise support. Refer to the development specification section
wepy.request ("xxxx"). Then ((d) = > console.log (d));
1). How to enable Promise support?
2. Can all native Wechat api be called in the way of wepy.apiName. For example, wx.login can use wepy.login, wx.setNavigationBarTitle can use wepy.setNavigationBarTitle

Mini-Program wepy
Mar.28,2021

the owner of the building can be obtained through wepy.$instance.globalData , and the personal test can be

.

question 1:

  • if you are writing a modular js file, you can pass in this.$parent to access the app instance when you load the module

question 2:

question 1: 

home.wpy
import login from '../utils/login'
onLoad(opts) {
  login.call(this, this.getHomeData)
}
------------------------------------------------
login.js
const login = function(fn) {
  console.log(this)  // undefined
  console.log('start login')
  wepy.checkSession({
    success: function(res) {
      console.log('login success')
      if (!wx.getStorageSync('auth_token')) {
        login$1.call(this, fn)
      } else {
        if (fn && typeof fn === 'function') {
          fn()
        }
      }
    },
    fail: function(res) {
      console.log('login fail')
      login$1.call(this, fn)
    }
  })
}
export default login

Previous: Js closure problem

Next: How to add color only to the pentagram inside, but not to the whole square?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
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-64f5-1b32895-2be05.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32895-2be05.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?