app.js

const {app, BrowserWindow, shell} = require('electron');
const Store = require('electron-store');

// 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 win;

function createWindow() {
	let store = new Store({defaults: {windowBounds: {width: 800, height: 600, x: 0, y: 0}}});
	let {width, height, x, y} = store.get('windowBounds');

	win = new BrowserWindow({
		icon: './dota2-inv.png',
		width, height,
		x, y,
		minWidth: 1024, minHeight: 800,
		show: false,
		frame: false,
		webPreferences: {
			nodeIntegration: true
		}
	});
	win.loadFile('index.html');
	win.setMenu(null);
	//win.webContents.openDevTools();

	win.once('ready-to-show', () => win.show());
	// The BrowserWindow class extends the node.js core EventEmitter class, so we use that API
	// to listen to events on the BrowserWindow. The resize event is emitted when the window size changes.
	win.on('resize', () => store.set('windowBounds', win.getBounds()));
	win.on('move', () => store.set('windowBounds', win.getBounds()));
	// 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.
	win.on('closed', () => win = null);

	// Open URLs externally
	win.webContents.on('new-window', (event, url) => {
		event.preventDefault();
		shell.openExternal(url);
	})
}

// 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', () => app.quit());