electron将web应用构建跨平台桌面应用

Electron是由Github开发，用HTML，CSS和JavaScript来构建跨平台桌面应用程序的一个开源库。 Electron通过将Chromium和Node.js合并到同一个运行时环境中，并将其打包为Mac，Windows和Linux系统下的应用来实现这一目的。

本文利用vue-cli快速搭建一个项目说明怎么将一个web应用打包构建成桌面应用的过程

开始

使用npm init初始化项目，配置依赖electron，electron-builder（打包组件），这里如果安装electron或者启动时报错，可以删除node_modules中electron的使用npm i electron@+指定版本即可

{
  "name": "electron-quick-start",
  "version": "1.0.0",
  "description": "A minimal Electron application",
  "main": "main.js",
  "scripts": {
    "start": "electron .",
    "build_win": "electron-builder --win --x64",
    "build_mac": "electron-builder --mac --x64"
  },
  "build": {
    "productName": "vuecli"
  },
  "repository": "https://github.com/electron/electron-quick-start",
  "keywords": [
    "Electron",
    "quick",
    "start",
    "tutorial",
    "demo"
  ],
  "author": "GitHub",
  "license": "CC0-1.0",
  "devDependencies": {
    "electron": "^3.1.0",
    "electron-builder": "^21.2.0"
  }
}

package.json需要注意的参数：
：项目入口文件，文件用于配置启动所需参数
scripts：启动命令

• start：开发启动命令
• build_win：构建win桌面应用
• build_mac：构建macos桌面应用
  build：构建应用参数，所有参数参考electron-build
• productName：应用名称
• output：产出目录

main.js

官方例子

// Modules to control application life and create native browser window
const {app, BrowserWindow} = require('electron')
const path = require('path')

// 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 mainWindow

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

  // and load the index.html of the app.
  mainWindow.loadFile('index.html')

  // 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
  })
}

// 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', function () {
  // 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', function () {
  // 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 (mainWindow === null) createWindow()
})

BrowserWindow浏览器代理，设置窗口信息等，mainWindow.loadFile('index.html')引入主页文件，webSecurity设置false可忽略浏览器跨域等，该设置可禁止浏览器同源策略，只能在测试环境使用，如需上线正式环境需另外配置网络代理。

静态文件准备

http请求

在测试环境下，如在main.js中设置了webSecurity为false，接口请求地址可设置为绝对路径（此设置忽略跨域），生产环境需另配网络转发。

路由

需修改的相关静态文件地址为相对路径，vue.config.js配置如下：

module.exports = {
      assetsDir: 'static',
      publicPath: './'
};

启动npm run build开始打包，打包后的文件在dist中，dist文件夹下的文件全部拷贝到electron的初始化项目的根目录下，运行npm start即可正常访问，npm run build_mac开发打包，完成后在根目录的dist下生成vuecli-1.0.0.dmg的桌面应用安装包

原文地址