如何隐藏electron窗体的菜单栏

electron中默认带有顶部菜单栏，有时候我们的应用不需要。
再background.js文件(主进程文件)中设置

const electron = require('electron') 
const path = require('path') 
const url = require('url') 
let mainWindow 
const Menu = electron.Menu 
function createWindow () {
　// 隐藏菜单栏
  Menu.setApplicationMenu(null)   // Create the browser window.设置窗口宽高，最小宽高，图标等   mainWindow = new BrowserWindow({ 
    width: 800, 
    height: 600, 
    minWidth: 1280, 
    minHeight: 800, 
    resizable: false, 
    allowRunningInsecureContent: true, 
    experimentalCanvasFeatures: true, 
    icon: './favicon.ico'
    })   
mainWindow.loadURL("http://www.nlfit.cn/saas/index.html#/login")     mainWindow.on('closed', function () {     
  mainWindow = null   
}) }

constelectron = 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.

// const app = electron.app

// const BrowserWindow = electron.BrowserWindow

constpath = require('path')

consturl = require('url')

letmainWindow

constMenu = electron.Menu

functioncreateWindow () {

Menu.setApplicationMenu(null)

// Create the browser window.

mainWindow = newBrowserWindow({ width:800, height:600, minWidth:1280, minHeight:800, resizable:false, allowRunningInsecureContent:true, experimentalCanvasFeatures:true, icon:'./favicon.ico'})

// and load the index.html of the app.

mainWindow.loadURL("http://www.nlfit.cn/saas/index.html#/login")

// Open the DevTools.

// mainWindow.webContents.openDevTools()

// Emitted when the window is closed.

mainWindow.on('closed', function () {

// 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.

mainWindow = null

})

}