vue项目打包流程
二、打包优化
1.首先在根目录下面创建一个vue.config.js
文件
2.去除.map文件,在vue.config.js文件里面抛出一个对象,然后把下面两段代码写到对象里面,然后在控制台或者终端通过npm run build命令,打包项目
注:如果一次不行,就在执行一次
module.exports = {}//在vue.config.js文件里面抛出一个对象
publicPath: "./",
productionSourceMap: false, //不输出map文件
3.开启CDN加速,把下面这段代码写到vue.config.js
这个文件里面,切记要写到module.exports = {}这个对象上面
/ 是否为生产环境
const isProduction = process.env.NODE_ENV !== 'development';// 本地环境是否需要使用cdn
const devNeedCdn = false// cdn链接
const cdn = {// cdn:模块名称和模块作用域命名(对应window里面挂载的变量名称)externals: {vue: 'Vue',vuex: 'Vuex','vue-router': 'VueRouter','marked': 'marked','highlight.js': 'hljs','nprogress': 'NProgress','axios': 'axios'},// cdn的css链接css: [],// cdn的js链接js: ['https://cdn.bootcss.com/vue/2.6.10/vue.min.js','https://cdn.bootcss.com/vuex/3.1.2/vuex.min.js','https://cdn.bootcss.com/vue-router/3.1.3/vue-router.min.js','https://cdn.bootcss.com/axios/0.19.2/axios.min.js']
}
3.1:在抛出的那个对象module.exports = {}里面写入下面这段代码
chainWebpack: config => {// ============注入cdn start============config.plugin('html').tap(args => {// 生产环境或本地需要cdn时,才注入cdnif (isProduction || devNeedCdn) args[0].cdn = cdnreturn args})// ============注入cdn start============
},
3.2:在public这个文件夹下面,找到index.html这个文件,在title
这个标签下面,head
头标签里面把下面这段代码复制进去
<!-- 使用CDN的CSS文件 --><% for (var i in htmlWebpackPlugin.options.cdn &&htmlWebpackPlugin.options.cdn.css) { %><link href="<%= htmlWebpackPlugin.options.cdn.css[i] %>" rel="stylesheet" /><% } %><!-- 使用CDN的CSS文件 --><!-- 使用CDN的JS文件 --><% for (var i in htmlWebpackPlugin.options.cdn &&htmlWebpackPlugin.options.cdn.js) { %><script src="<%= htmlWebpackPlugin.options.cdn.js[i] %>"></script><% } %><!-- 使用CDN的JS文件 -->
3.3:上面这些操作步骤就是开始CDN加速的流程,把上面这些步骤操作完以后,我们继续在控制台输入npm run build
这个命令,继续打包,打包完成以后在你的文件夹里面应该会有一个dist这个文件,这个文件就是打包后的文件,你可以鼠标右键,点击属性,就可以看到他的体积已经变小啦
4.我们继续执行下面的步骤
代码压缩:
4.1:首先我们先在控制台安装命令:npm i -D uglifyjs-webpack-plugin
4.2.然后把下面这段代码写到vue.config.js
这个文件里面,这段代码也是要写到抛出的那个对象外面,不能写到抛出的对象里面
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
4.3:接着我们把下面的代码写到configureWebpack
这个对象里面,写完以后继续执行npm run build
命令,继续打包,打包完成以后再dist这个文件夹里面有个index.html,然后双击打开它,看项目是否能跑起来
// 代码压缩config.plugins.push(new UglifyJsPlugin({uglifyOptions: {//生产环境自动删除consolecompress: {drop_debugger: true,drop_console: true,pure_funcs: ['console.log']}},sourceMap: false,parallel: true})
)
5.接着操作公共代码抽离,还是在configureWebpack
这个对象里面继续往下写
// 公共代码抽离
config.optimization = {splitChunks: {cacheGroups: {vendor: {chunks: 'all',test: /node_modules/,name: 'vendor',minChunks: 1,maxInitialRequests: 5,minSize: 0,priority: 100},common: {chunks: 'all',test: /[\\/]src[\\/]js[\\/]/,name: 'common',minChunks: 2,maxInitialRequests: 5,minSize: 0,priority: 60},styles: {name: 'styles',test: /\.(sa|sc|c)ss$/,chunks: 'all',enforce: true},runtimeChunk: {name: 'manifest'}}}
}
6.骨架屏
- 先安装
npm install vue-skeleton-webpack-plugin
这个命令 - 然后在src这个文件夹下面创建一个Skeleton文件夹,这个名字可以自定义,在这个文件夹下面创建两个文件,
index.js
和index.vue
这个两个文件
index.js里面写入下面代码
import Vue from 'vue'
import Skeleton from './index.vue'
export default new Vue({components: {Skeleton},template: '<Skeleton />'
})
index.vue里面写入:
<template><div class="skeleton-wrapper"><header class="skeleton-header"></header><section class="skeleton-block"><img src="data:image/svg+xml;base64,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"><img src="data:image/svg+xml;base64,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"></section></div>
</template><script>export default {name: 'skeleton'}
</script><style scoped>.skeleton-header {height: 40px;background: #1976d2;padding:0;margin: 0;width: 100%;}.skeleton-block {display: flex;flex-direction: column;padding-top: 8px;}</style>
7.下面在vue.config.js
写入
注:这段代码写到configureWebpack
这个对象里面
config.plugins.push(new SkeletonWebpackPlugin({webpackConfig: {entry: {app: path.join(__dirname, './src/skeleton/indx.js'),},},minimize: true,quiet: true,// 如果不设置那么所有的路由都会共享这个骨架屏组件router: {mode: 'hash',// 给对应的路由设置对应的骨架屏组件,skeletonId的值根据组件设置的idroutes: [{ path: '/home', skeletonId: 'skeleton' }]}}))
下面这段代码写到对象外面,不能学到任何的一个对象里面
//骨架屏渲染
const SkeletonWebpackPlugin = require('vue-skeleton-webpack-plugin')//path引入
const path = require('path')