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vue项目cdn打包优化

news 2025/8/17 12:33:56

0.用vue ui可以查看项目打包后的情况。

1.定义包的排除

let externals = {'axios': 'axios','element-ui': 'ELEMENT','echarts': 'echarts',}
configureWebpack: {externals: externals }

2.配置cdn包资源

// 配置
let cdn = {css: [// element-ui css'https://unpkg.com/element-ui/lib/theme-chalk/index.css',// 样式表],js: [// vue must at first!'https://unpkg.com/vue/dist/vue.js', // vuejs// element-ui js'https://unpkg.com/element-ui/lib/index.js', // elementUI]
}
// 插入html的属性中chainWebpack (config) {config.plugin('html').tap(args => {args[0].cdn = cdnreturn args})}

3.在public文件夹下的html的head标签中插入cdn资源

<% for(var css of htmlWebpackPlugin.options.cdn.css) { %><link rel="stylesheet" href="<%=css%>" />
<% } %>
<% for(var js of htmlWebpackPlugin.options.cdn.js) { %><script src="<%=js%>"></script>
<% } %>

4.根据环境,配置是否使用cdn

const isProd = process.env.NODE_ENV === 'production' 
...
cdn = isProd ? cdn : { css: [], js: [] }
externals = isProd ? externals : {}

5.运行npm run build打包即可。

注意：ui组件的css要在mian.js中注释掉(如import ‘element-ui/lib/theme-chalk/index.css’)，因为我们在externals并没有去定义排除。其他的能在externals定义的资源(如import ElementUI from ‘element-ui’;Vue.use(ElementUI)),都不需要改动，打包后也没有啥影响。还有ui组件我用的整体引入的方式,按需引入配置有点麻烦,就没去弄了。

6.完整代码：

vue.config.js

const { defineConfig } = require('@vue/cli-service')
// 排除
let externals = {'vue': 'Vue','axios': 'axios','element-ui': 'ELEMENT','echarts': 'echarts',
}
// cdn资源
let cdn = {css: [// element-ui css'https://unpkg.com/element-ui/lib/theme-chalk/index.css',// 样式表],js: [// vue must at first!'https://unpkg.com/vue@2/dist/vue.js', // vuejs// element-ui js'https://unpkg.com/element-ui/lib/index.js', // elementUI'https://unpkg.com/axios/dist/axios.min.js','https://cdnjs.cloudflare.com/ajax/libs/echarts/5.4.3/echarts.min.js']
}
// 判断环境
const isProd = process.env.NODE_ENV === 'production'
cdn = isProd ? cdn : { css: [], js: [] }
externals = isProd ? externals : {}
module.exports = defineConfig({transpileDependencies: true,publicPath:'./',configureWebpack: {externals: externals},chainWebpack(config) {config.plugin('html').tap(args => {args[0].cdn = cdnreturn args})}
})

main.js

import Vue from 'vue'
import App from './App.vue'
import axios from 'axios'
import ElementUI from 'element-ui';
// 打生产包时注释掉下面的css
import 'element-ui/lib/theme-chalk/index.css';Vue.config.productionTip = false
Vue.$axios = axios
Vue.use(ElementUI);new Vue({render: h => h(App),
}).$mount('#app')

public/index

<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><!-- 如果不想这样写，也可以像下面这样直接引入资源 --><% for(var css of htmlWebpackPlugin.options.cdn.css) { %><link rel="stylesheet" href="<%=css%>" /><% } %><% for(var js of htmlWebpackPlugin.options.cdn.js) { %><script src="<%=js%>"></script><% } %><!-- 如果想直接引入资源,就不需要上面这段,然后vue.config.js中的 args[0].cdn = cdn也不需要了 --><link href="https://unpkg.com/element-ui/lib/theme-chalk/index.css" rel="stylesheet"><script src="https://unpkg.com/vue@2/dist/vue.js"></script><script src="https://unpkg.com/element-ui/lib/index.js"></script><script src="https://unpkg.com/axios/dist/axios.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/echarts/5.4.3/echarts.min.js"></script>
</head>