// app.js
App({
 globalData: 1
})

// a.js
// The localValue can only be used in file a.js.
var localValue = 'a'
// Get the app instance.
var app = getApp()
// Get the global data and change it.
app.globalData++

// b.js
// You can redefine localValue in file b.js, without interference with the localValue in a.js.
var localValue = 'b'
// If a.js it run before b.js, now the globalData shoule be 2.
console.log(getApp().globalData)

// common.js
function sayHello(name) {
 console.log('Hello ' + name + '!')
}
module.exports = {
 sayHello: sayHello
}

var common = require('common.js')
Page({
 helloMINA: function() {
 common.sayHello('MINA')
 }
})