app.js

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

// 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 () {
    // Create the browser window.
    win = new BrowserWindow({width: 800, height: 600});

    // Hide menubar
    //win.setMenu(null);

    /*
    const template = [
	{
	    label: 'Edit',
	    submenu: [
		{role: 'undo'},
		{role: 'redo'},
		{type: 'separator'},
		{role: 'cut'},
		{role: 'copy'},
		{role: 'paste'},
		{role: 'pasteandmatchstyle'},
		{role: 'delete'},
		{role: 'selectall'}
	    ]
	},
	{
	    label: 'View',
	    submenu: [
		{role: 'reload'},
		{role: 'forcereload'},
		{role: 'toggledevtools'},
		{type: 'separator'},
		{role: 'resetzoom'},
		{role: 'zoomin'},
		{role: 'zoomout'},
		{type: 'separator'},
		{role: 'togglefullscreen'}
	    ]
	},
	{
	    role: 'window',
	    submenu: [
		{role: 'minimize'},
		{role: 'close'}
	    ]
	},
	{
	    role: 'help',
	    submenu: [
		{
		    label: 'Learn More',
		    click () { require('electron').shell.openExternal('https://electron.atom.io') }
		}
	    ]
	}
    ]

    if (process.platform === 'darwin') {
	template.unshift({
	    label: app.getName(),
	    submenu: [
		{role: 'about'},
		{type: 'separator'},
		{role: 'services', submenu: []},
		{type: 'separator'},
		{role: 'hide'},
		{role: 'hideothers'},
		{role: 'unhide'},
		{type: 'separator'},
		{role: 'quit'}
	    ]
	})

	// Edit menu
	template[1].submenu.push(
	    {type: 'separator'},
	    {
		label: 'Speech',
		submenu: [
		    {role: 'startspeaking'},
		    {role: 'stopspeaking'}
		]
	    }
	)

	// Window menu
	template[3].submenu = [
	    {role: 'close'},
	    {role: 'minimize'},
	    {role: 'zoom'},
	    {type: 'separator'},
	    {role: 'front'}
	]
    }

    const menu = BrowserWindow.buildFromTemplate(template)
    BrowserWindow.setApplicationMenu(menu)
    */

    // and load the index.html of the app.
    win.loadURL(url.format({
        pathname: path.join(__dirname, 'index.html'),
        protocol: 'file:',
        slashes: true
    }));

    // Open the DevTools.
    //win.webContents.openDevTools();

    // Emitted when the window is closed.
    win.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.
        win = null;
    });
}

// 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', () => {
    // On macOS 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', () => {
    // On macOS 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 (win === null) {
        createWindow();
    }
});

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.