main.js

const {app, BrowserWindow} = require('electron');
const path = require('path');

if (process.env.NODE_ENV === "development") {
	require('electron-reload')(__dirname);
}

// 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() {
	mainWindow = new BrowserWindow({
		width: 1024, 
		height: 768
	});

	mainWindow.loadFile("./app/index.html");

	if (process.env.NODE_ENV === "development") {
		mainWindow.webContents.openDevTools();
	}

	mainWindow.on('closed', () => {
		// 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;
	});

	require('./mainMenu');
}

app.on('ready', createWindow);

app.on('activate', () => {
	// 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();
	}
});

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();
	}
});