无法在Electron应用程序中修改应用程序菜单

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

let mainWindow;

app.on('ready', () => {
  mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      nodeIntegration: true
    }
  });

  const template = [
    {
      label: 'File',
      submenu: [
        {
          label: 'Open',
          click: () => {
            console.log('Open file');
          }
        },
        {
          label: 'Save',
          click: () => {
            console.log('Save file');
          }
        },
        { role: 'quit' }
      ]
    },
    {
      label: 'Edit',
      submenu: [
        { role: 'undo' },
        { role: 'redo' },
        { type: 'separator' },
        { role: 'cut' },
        { role: 'copy' },
        { role: 'paste' }
      ]
    }
  ];

  const menu = Menu.buildFromTemplate(template);
  Menu.setApplicationMenu(menu);
});

const newTemplate = [
  {
    label: 'New Menu',
    submenu: [
      {
        label: 'New Item',
        click: () => {
          console.log('New item clicked');
        }
      }
    ]
  }
];

const newMenu = Menu.buildFromTemplate(newTemplate);
Menu.setApplicationMenu(newMenu);