Electron是一个能帮你用JS来写桌面程序的node项目。原先是为Atom打造的,后来直接演化成兄弟项目。现在已经有很多大厂也开始使用Electron来写桌面app了。比如独角兽slack、微软的VS code、avocode、weFlow等等等等。

ok,接下来就让我们来开始动手吧。以下内容除去下载文件的时间,三分钟就可以完成。

1.安装Electron。

// 全局安装electron,因为我们要用到它的命令行。

$ npm install electron -g

// 但是npm安装electron要从国外下载一个45MB左右的zip包,特别的慢(8KB…),所以我们可以采用下面的这条安装命令。
// 这条安装命令会从淘宝的镜像站下载这个zip包,速度很快,达到你的带宽巅峰。

$ npm install electron -g –registry=http://registry.npm.taobao.org

// 当然你也可以使用cnpm来全局安装electron

$ npm install cnpm -g –registry=http://registry.npm.taobao.org
$ cnpm install electron -g

2.准备三个小文件(以下内容直接粘贴复制)
本部分来自于官网quick start。

新建一个项目目录文件夹,名字就叫desktopApp好了。
新建三个文件

desktopApp/
├── package.json
├── main.js
└── index.html

三个文件填入以下内容:

在package.json中:

{
“name” : “your-app”,
“version” : “0.1.0”,
“main” : “main.js”
}

在main.js中

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.

在index.html中

<!DOCTYPE html>
<html>
<head>
<meta charset=”UTF-8″>
<title>Hello World!</title>
</head>
<body>
<h1>Hello World!</h1>
We are using node <script>document.write(process.versions.node)</script>,
Chrome <script>document.write(process.versions.chrome)</script>,
and Electron <script>document.write(process.versions.electron)</script>.
</body>
</html>

3.运行
在这个项目目录下面运行一条命令就可以启动我们的app了。

$ electron .

Done!完美!天才第一步,达成!

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