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

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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-64f5-1bedabe-140d8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bedabe-140d8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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