1.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="https://www.atool.online/article/<%= 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="https://www.atool.online/article/<%=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="https://www.atool.online/article/<%=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="https://www.atool.online/article/<%= 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

到此这篇关于vue项目打包优化的文章就介绍到这了,更多相关vue项目打包优化内容请搜索阿兔在线工具以前的文章或继续浏览下面的相关文章希望大家以后多多支持阿兔在线工具!

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