electron入門代碼

Electron 提供了一個實時構建桌面應用的純 JavaScript 環境。Electron 能夠獲取到你定義在 package.json 中 main 文件內容，而後執行它。經過這個文件（一般咱們稱之爲 main.js），能夠建立一個應用窗口，這個應用窗口包含一個渲染好的 web 界面，還能夠和系統原生的 GUI 交互。

具體來講，就是當你啓動了一個 Electron 應用，就有一個主進程（main process ）被建立了。這條進程將負責建立出應用的 GUI（也就是應用的窗口），並處理用戶與這個 GUI 之間的交互。

但直接啓動 main.js 是沒法顯示應用窗口的，在 main.js 中經過調用BrowserWindow模塊才能將使用應用窗口。而後每一個瀏覽器窗口將執行它們各自的渲染器進程（ renderer process ）。渲染器進程將會處理一個真正的 web 頁面（HTML + CSS + JavaScript），將頁面渲染到窗口中。鑑於 Electron 使用的是基於 Chrominum 的瀏覽器內核，你就不太須要考慮兼容的問題。

const {app, BrowserWindow} = require('electron')
const path = require('path')
const url = require('url')

// 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, autoHideMenuBar: true })

  // and load the index.html of the app.
  win.loadURL(url.format({
    pathname: path.join(__dirname, 'index.html'),
    protocol: 'file:',
    slashes: true
  }))

  // 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.