index.js

'use strict';
const electron = require('electron');
const autoUpdater = require('electron-updater').autoUpdater;
const isDev = require('electron-is-dev');
const app = electron.app;
const BrowserWindow = electron.BrowserWindow;

// adds debug features like hotkeys for triggering dev tools and reload
require('electron-debug')();

// prevent window being garbage collected
let mainWindow;

function onClosed() {
	// dereference the window
	// for multiple windows store them in an array
	mainWindow = null;
}

function createMainWindow() {
	const win = new BrowserWindow();

	win.loadURL(`file://${__dirname}/build/index.html`);
	win.on('closed', onClosed);

	return win;
}

app.on('window-all-closed', () => {
	if (process.platform !== 'darwin') {
		app.quit();
	}
});

app.on('activate-with-no-open-windows', () => {
	if (!mainWindow) {
		mainWindow = createMainWindow();
	}
});

app.on('ready', () => {
	mainWindow = createMainWindow();
});

if (!isDev) {
	autoUpdater.logger = require('electron-log');
	autoUpdater.logger.transports.file.level = 'info';

	autoUpdater.on('update-downloaded', (info) => {
		autoUpdater.quitAndInstall();
	});

	app.on('ready', function () {
		autoUpdater.checkForUpdates();
	});
}