vue项目打包优化
一只小菜鸡111 人气:01.按需加载第三方库
例如 ElementUI、lodash 等
a, 装包
npm install babel-plugin-component -D
b, babel.config.js
module.exports = { "presets": [ "@vue/cli-plugin-babel/preset" ], "plugins": [ [ "component", { "libraryName": "element-ui", "styleLibraryName": "theme-chalk" } ] ] }
c, main.js
import ElementUI from 'element-ui' import 'element-ui/lib/theme-chalk/index.css' Vue.use(ElementUI)
换成
import './plugins/element.js'
element.js
import Vue from 'vue' import { Button, Form, FormItem, Input, Message, Header, Container, Aside, Main, Menu, Submenu, MenuItemGroup, MenuItem, Breadcrumb, BreadcrumbItem, Card, Row, Col, Table, TableColumn, Switch, Tooltip, Pagination, Dialog, MessageBox, Tag, Tree, Select, Option, Cascader, Alert, Tabs, TabPane, Steps, Step, CheckboxGroup, Checkbox, Upload, Timeline, TimelineItem } from 'element-ui' Vue.use(Button) Vue.use(Form) Vue.use(FormItem) Vue.use(Input) Vue.use(Header) Vue.use(Container) Vue.use(Aside) Vue.use(Main) Vue.use(Menu) Vue.use(Submenu) Vue.use(MenuItemGroup) Vue.use(MenuItem) Vue.use(Breadcrumb) Vue.use(BreadcrumbItem) Vue.use(Card) Vue.use(Row) Vue.use(Col) Vue.use(Table) Vue.use(TableColumn) Vue.use(Switch) Vue.use(Tooltip) Vue.use(Pagination) Vue.use(Dialog) Vue.use(Tag) Vue.use(Tree) Vue.use(Select) Vue.use(Option) Vue.use(Cascader) Vue.use(Alert) Vue.use(Tabs) Vue.use(TabPane) Vue.use(Steps) Vue.use(Step) Vue.use(CheckboxGroup) Vue.use(Checkbox) Vue.use(Upload) Vue.use(Timeline) Vue.use(TimelineItem) // 把弹框组件挂着到了 vue 的原型对象上,这样每一个组件都可以直接通过 this 访问 Vue.prototype.$message = Message Vue.prototype.$confirm = MessageBox.confirm
效果图
优化 按需加载第三方工具包(例如 lodash)或者使用 CDN 的方式进行处理。
按需加载使用的工具方法 (当用到的工具方法少时按需加载打包) 用到的较多通过cdn
通过form lodash 搜索 哪处用到
例如此处的 1.
换成
按需导入
效果图
2.移除console.log
npm i babel-plugin-transform-remove-console -D
babel.config.js
const prodPlugins = [] if (process.env.NODE_ENV === 'production') { prodPlugins.push('transform-remove-console') } module.exports = { presets: ['@vue/cli-plugin-babel/preset'], plugins: [ [ 'component', { libraryName: 'element-ui', styleLibraryName: 'theme-chalk' } ], ...prodPlugins ] }
效果图
3. Close SourceMap
生产环境关闭 功能
vue.config.js
module.exports = { productionSourceMap: false }
效果图
4. Externals && CDN
通过 externals 排除第三方 JS 和 CSS 文件打包,使用 CDN 加载。
vue.config.js
module.exports = { productionSourceMap: false, chainWebpack: (config) => { config.when(process.env.NODE_ENV === 'production', (config) => { const cdn = { js: [ 'https://cdn.staticfile.org/vue/2.6.11/vue.min.js', 'https://cdn.staticfile.org/vue-router/3.1.3/vue-router.min.js', 'https://cdn.staticfile.org/axios/0.18.0/axios.min.js', 'https://cdn.staticfile.org/echarts/4.1.0/echarts.min.js', 'https://cdn.staticfile.org/nprogress/0.2.0/nprogress.min.js', 'https://cdn.staticfile.org/quill/1.3.4/quill.min.js', 'https://cdn.jsdelivr.net/npm/vue-quill-editor@3.0.4/dist/vue-quill-editor.js' ], css: [ 'https://cdn.staticfile.org/nprogress/0.2.0/nprogress.min.css', 'https://cdn.staticfile.org/quill/1.3.4/quill.core.min.css', 'https://cdn.staticfile.org/quill/1.3.4/quill.snow.min.css', 'https://cdn.staticfile.org/quill/1.3.4/quill.bubble.min.css' ] } config.set('externals', { vue: 'Vue', 'vue-router': 'VueRouter', axios: 'axios', echarts: 'echarts', nprogress: 'NProgress', 'nprogress/nprogress.css': 'NProgress', 'vue-quill-editor': 'VueQuillEditor', 'quill/dist/quill.core.css': 'VueQuillEditor', 'quill/dist/quill.snow.css': 'VueQuillEditor', 'quill/dist/quill.bubble.css': 'VueQuillEditor' }) config.plugin('html').tap((args) => { args[0].isProd = true args[0].cdn = cdn return args }) }) } }
public/index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width,initial-scale=1.0"> <link rel="icon" href="<%= BASE_URL %>favicon.ico"> <title> <%= htmlWebpackPlugin.options.title %> </title> <% if(htmlWebpackPlugin.options.isProd){ %> <% for(var css of htmlWebpackPlugin.options.cdn.css) { %> <link rel="stylesheet" href="<%=css%>"> <% } %> <% } %> </head> <body> <noscript> <strong>We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work properly without JavaScript enabled. Please enable it to continue.</strong> </noscript> <div id="app"></div> <!-- built files will be auto injected --> <% if(htmlWebpackPlugin.options.isProd){ %> <% for(var js of htmlWebpackPlugin.options.cdn.js) { %> <script src="<%=js%>"></script> <% } %> <% } %> </body> </html>
效果图
继续对 ElementUI 的加载方式进行优化
vue.config.js
module.exports = { chainWebpack: config => { config.when(process.env.NODE_ENV === 'production', config => { config.set('externals', { './plugins/element.js': 'ELEMENT' }) config.plugin('html').tap(args => { args[0].isProd = true return args }) }) } }
public/index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width,initial-scale=1.0"> <link rel="icon" href="<%= BASE_URL %>favicon.ico"> <title> <%= htmlWebpackPlugin.options.isProd ? '' : 'dev - ' %>电商后台管理系统 </title> <% if(htmlWebpackPlugin.options.isProd){ %> <!-- element-ui 的样式表文件 --> <link rel="stylesheet" href="https://cdn.staticfile.org/element-ui/2.13.0/theme-chalk/index.css" /> <!-- element-ui 的 js 文件 --> <script src="https://cdn.staticfile.org/element-ui/2.13.0/index.js"></script> <% } %> </head> <body> <noscript> <strong>We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work properly without JavaScript enabled. Please enable it to continue.</strong> </noscript> <div id="app"></div> <!-- built files will be auto injected --> </body> </html>
效果图
5.路由懒加载的方式
import Vue from 'vue' import VueRouter from 'vue-router' import Login from '../components/Login.vue' Vue.use(VueRouter) const routes = [ { path: '/', redirect: '/login' }, { path: '/login', component: Login }, { path: '/Home', component: () => import('../components/Home.vue'), redirect: '/welcome', children: [ { path: '/welcome', component: () => import('../components/Welcome.vue') }, { path: '/users', component: () => import('../components/user/Users.vue') }, { path: '/rights', component: () => import('../components/power/Rights.vue') }, { path: '/roles', component: () => import('../components/power/Roles.vue') }, { path: '/categories', component: () => import('../components/goods/Cate.vue') }, { path: '/params', component: () => import('../components/goods/Params.vue') }, { path: '/goods', component: () => import('../components/goods/List.vue') }, { path: '/goods/add', component: () => import('../components/goods/Add.vue') }, { path: '/orders', component: () => import('../components/order/Order.vue') }, { path: '/reports', component: () => import('../components/report/Report.vue') } ] } ] const router = new VueRouter({ routes }) router.beforeEach((to, from, next) => { // to 要访问的路径 // from 从哪里来的 // next() 直接放行,next('/login') 表示跳转 // 要访问 /login 的话那直接放行 if (to.path === '/login') return next() const tokenStr = window.sessionStorage.getItem('token') // token 不存在那就跳转到登录页面 if (!tokenStr) return next('/login') // 否则 token 存在那就放行 next() }) export default router
其他:图片压缩、CSS 压缩和提取、JS 提取...
1.部署到 Nginx
下载 Nginx,双击运行 nginx.exe,浏览器输入 localhost 能看到界面表示服务启动成功!
前端 axios 中的 baseURL 指定为 /api,配置 vue.config.js 代理如下
module.exports = { devServer: { proxy: { '/api': { target: 'http://127.0.0.1:8888', changeOrigin: true } } } }
路由模式、基准地址、404 记得也配置一下
const router = new VueRouter({ mode: 'history', base: '/shop/', routes: [ // ... { path: '*', component: NotFound } ] })
执行 npm run build 打包,把 dist 中的内容拷贝到 Nginx 的 html 文件夹中
修改 Nginx 配置
http { server { listen 80; location / { # proxy_pass https://www.baidu.com; root html; index index.html index.htm; try_files $uri $uri/ /index.html; } location /api { # 重写地址 # rewrite ^.+api/?(.*)$ /$1 break; # 代理地址 proxy_pass http://127.0.0.1:8888; # 不用管 proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } } }
重启服务
nginx -s reload
访问 localhost 查看下效果吧
开启 Gzip 压缩
前端通过 vue.config.js 配置,打包成带有 gzip 的文件
const CompressionWebpackPlugin = require('compression-webpack-plugin') module.exports = { configureWebpack: config => { if (process.env.NODE_ENV === 'production') { config.plugins = [...config.plugins, new CompressionWebpackPlugin()] } } }
Nginx 中开启 gzip 即可
总结
加载全部内容