###### tags: `Node.js`

# Electron 包裝

首先安裝Electron

npm install electron --save

建立main.js
主要控制electron的視窗函式
以下為官方提供
可將其內的code放於其他js檔內，以可調用為主**
##### main.js

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})

  // 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.

將要顯示的首頁設為index.html
接下來設定package.json
##### package.json

{
  "name": "watching",
  "version": "1.0.0",
  "description": "watching product.",
  "main": "api.js",
  "scripts": {
    "start": "electron .",
    "bulid_win":"electron-packager . WinApp --platform=win32 --arch=x64"
  },

此例中
我將官方提供的main.js的程式碼放入api.js，以便能同時開啟sever，這應該不是最好的辦法啦
第5行的main設定引用有官方程式碼的檔案
第7行是使用electron啟動專案
第8行是將專案輸出成.exe檔
指令為

npm run build_win


# 示範

# Tip
1.若要不顯示開發者視窗
將此行註解

win.webContents.openDevTools();

2.隱藏主選單列
在 createWindow方法內加入

electron.Menu.setApplicationMenu(null);

3.若希望隱藏程式碼，可以在輸出時加入 --asar ，讓electron封裝起來
將bulid_win改成下列

"build_win": "electron-packager . WinApp --platform=win32 --arch=x64 --asar"

4.其餘版本的輸出指令
Linux

"bulid_linux":"electron-packager . LinuxApp --platform=linux --arch=x64 --asar"

Linux ARM

"bulid_arm":"electron-packager . ARMApp --platform=linux --arch=armv7l --asar"

# Dark Theme CSS

{%hackmd theme-dark %}