main.js

// Modules to control application life and create native browser window
const {app, BrowserWindow} = require('electron')
const fs = require('fs')
const path = require('path')
const isDev = require('electron-is-dev')

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow

function createWindow () {
  // Create the database file rifht away
  let database = 'database.sqlite3'
  if (! fs.existsSync(app.getPath('userData') + '/' + database) || isDev) {
    fs.copyFileSync(path.join(__dirname, 'db', database), app.getPath('userData') + '/' + database)
  }

  // Create the browser window.
  mainWindow = new BrowserWindow({width: 1280, height: 720})

  // and load the index.html of the app.
  mainWindow.loadFile('public/index.html')
  // mainWindow.loadURL('http://pro-skool.com/web/group_admin');

  // Open the DevTools.
  if (isDev) {
    mainWindow.webContents.openDevTools()
  }

  // Emitted when the window is closed.
  mainWindow.on('closed', function () {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    mainWindow = null
  })
}

function startMonit() {
  if (isDev) {
    const elemon = require('elemon')
    elemon({
      app: app,
      mainFile: 'main.js',
      bws: [
        { bw: mainWindow, res: [] }
      ]
    })
    console.log('Hot reloading...')
  }
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', function() {
  createWindow()

  startMonit()
})

// Quit when all windows are closed.
app.on('window-all-closed', function () {
  // On OS X it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== 'darwin') {
    app.quit()
  }
})

app.on('activate', function () {
  // On OS X it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (mainWindow === null) {
    createWindow()
  }
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.