Wechat applets life cycle and global variables

App({
  // Lifecycle callback -- listens for applets initialization
  onLaunch (options) {

  },
  // Lifecycle callback -- listens for applets to start or cut foreground
  onShow (options) {

  },
  // Lifecycle callback -- listen for applets to cut background
  onHide () {

  },
  // Error listener function
  onError (msg) {

  },
  // There is no listener on the page
  onPageNotFound (options) {
 
  },
  // Unprocessed Promises reject event listeners
  onUnhandledRejection (options) {

  },
  // Listen for system theme changes
  onThemeChange(options){},// Developers can add any function or data variable to the Object argument, which can be accessed with this
  globalData: 'I am global data'
})
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// Other js files get global variables
var appInstance = getApp()
console.log(appInstance.globalData) // I am global data
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