main.js

const {Menu, BrowserWindow, app} = 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.
let mainWindow = null;

const menuTemplate = [
  {
    label: 'View',
    submenu: [
      {
        label: 'Reload',
        accelerator: 'CmdOrCtrl+R',
        click (item, focusedWindow) {
          if (focusedWindow) {
            focusedWindow.reload();
          }
        }
      },
      {
        label: 'Toggle Developer Tools',
        accelerator: process.platform === 'darwin' ? 'Alt+Command+I' : 'Ctrl+Shift+I',
        click (item, focusedWindow) {
          if (focusedWindow) {
            focusedWindow.webContents.toggleDevTools();
          }
        }
      },
      {
        type: 'separator'
      },
      {
        role: 'resetzoom'
      },
      {
        role: 'zoomin'
      },
      {
        role: 'zoomout'
      },
      {
        type: 'separator'
      },
      {
        role: 'togglefullscreen'
      }
    ]
  },
  {
    role: 'window',
    submenu: [
      {
        role: 'minimize'
      },
      {
        role: 'close'
      },
      {
        type: 'separator'
      },
      {
        label: 'Preferences',
        click () {
          let preferencesWindow = new BrowserWindow({frame: true, parent: mainWindow, modal: true});
          preferencesWindow.loadURL(`file://${__dirname}/pages/preferences/preferences.html`);
          preferencesWindow.once('ready-to-show', () => {
              preferencesWindow.show();
          });
        }
      }
    ]
  },
  {
    role: 'help',
    submenu: [
      {
        label: 'Learn More',
        click () {
          require('electron').shell.openExternal('https://github.com/Dica-Developer/ttws');
        }
      }
    ]
  }
];
let menu = Menu.buildFromTemplate(menuTemplate);
Menu.setApplicationMenu(menu);

function createWindow () {
  mainWindow = new BrowserWindow({width: 800, height: 600});

  mainWindow.loadURL(`file://${__dirname}/pages/main/main.html`);

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

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