main.js

const { app, Menu, BrowserWindow, ipcMain } = require("electron");

// 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.
var mainWindow = null;

// 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();
	}
});

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
app.on("ready", function() {
	// create the browser window.
	mainWindow = new BrowserWindow({
		width: 1200,
		height: 800
	});

	// and load the index.html of the app.
	mainWindow.loadURL(
		"file://" + __dirname + "/landho-core/index.html?version=" + process.env.npm_package_version
	);
	mainWindow.toggleDevTools();

	// 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;
	});
});