main.js

// Skeleton electron application copied from https://github.com/electron/electron-quick-start
const electron = require('electron');
const app = electron.app;
const BrowserWindow = electron.BrowserWindow;
const path = require('path');
const url = require('url');

let debug = /--dev/.test(process.argv[2]);
let win;

function createWindow () {
  // Create the browser window.
  win = new BrowserWindow({
    width: 1200,
    height: 900,
    show: !!debug
  });

  // and load the index.html of the app.
  win.loadURL(url.format({
    pathname: path.join(__dirname, 'index.html'),
    protocol: 'file:',
    slashes: true
  }));

  // Open the DevTools in debug mode
  debug && win.webContents.on('did-frame-finish-load', () => win.webContents.openDevTools());

  // Emitted when the window is closed.
  win.on('closed', () => win = null);
}

// 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', createWindow);

// Quit when all windows are closed.
app.on('window-all-closed', () => {
  // 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 (win === null) {
    createWindow();
  }
});