main.js

'use strict';

const electron = require('electron');
const app = electron.app;
const BrowserWindow = electron.BrowserWindow;

let mainWindow;

function createWindow () {
  mainWindow = new BrowserWindow({width: 800, height: 600});

  if (process.env.NODE_ENV === 'development') {
    mainWindow.loadURL('file://' + __dirname + '/src/index.html');
    mainWindow.webContents.openDevTools();
  } else {
    mainWindow.loadURL('file://' + __dirname + '/dist/index.html');
  }

  mainWindow.on('closed', function() {
    mainWindow = null;
  });
}

app.on('ready', createWindow);

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();
  }
});