尝试运行基于电子的应用程序时遇到问题？

Question

我正在尝试根据 http://electron.atom.io/docs/tutorial/quick-start/ 的说明创建一个简单的基于 Electron 的应用程序，该说明提供以下代码。当我尝试使用电子 1.4.4 和 NodeJS 6.7.0 运行它时，我得到：

TypeError: Cannot read property 'on' of undefined
    at Object.<anonymous> (/path/to/proj/src/goelectron.js:29:4)

代码如下：

const {app, BrowserWindow} = 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 win

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

  // and load the index.html of the app.
  win.loadURL(`file://${__dirname}/index.html`)

  // 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.

这表明 'app' 未定义，但我不熟悉 const {app, BrowserWindow} = require('electron') 提供的符号，所以我不确定如何检查有什么问题？

Answer 1

原来这是用“electron”命令运行的，所以因为我没有全局安装它（假设我在我的项目目录中）：

node_modules/.bin/electron ./src/goelectron.js

如果我有，那就是：

electron ./src/goelectron.js