在background,js里面引用Menu

import { Menu } from 'electron'

再在当前文件中如下地方添加如下代码

async function createWindow() {
  // Create the browser window.
  Menu.setApplicationMenu(null) // null值取消顶部菜单栏
  const win = new BrowserWindow({
    width: 1280,
    height: 960,
    webPreferences: {
      nodeIntegration: true,
      contextIsolation: false
    }
  })

  if (process.env.WEBPACK_DEV_SERVER_URL) {
    await win.loadURL(process.env.WEBPACK_DEV_SERVER_URL)
    if (!process.env.IS_TEST) win.webContents.openDevTools()
  } else {
    createProtocol('app')
    win.loadURL('app://./index.html')
  }
}