vue cli3打包优化
const path = require("path");
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const isProduction = process.env.NODE_ENV === 'production';
const cdn = {
css: [],
js: [
'https://cdn.bootcss.com/vue/2.5.17/vue.runtime.min.js',
'https://cdn.bootcss.com/vue-router/3.0.1/vue-router.min.js',
'https://cdn.bootcss.com/vuex/3.0.1/vuex.min.js',
'https://cdn.bootcss.com/axios/0.18.0/axios.min.js',
]
}
function resolve(dir) {
return path.join(__dirname, dir)
}
module.exports = {
// 基本路径
baseUrl: './',
// 输出文件目录
outputDir: 'dist',
// 放置生成的静态资源 (js、css、img、fonts) 的 (相对于 outputDir 的) 目录。
// assetsDir: "./",
// 指定生成的 index.html 的输出路径 (相对于 outputDir)。也可以是一个绝对路径
indexPath: './',
// eslint-loader 是否在保存的时候检查
lintOnSave: true,
// webpack配置
// see https://github.com/vuejs/vue-cli/blob/dev/docs/webpack.md
chainWebpack: config => {
config
.entry('index')
.add('babel-polyfill')
.end();
// 配置别名
config.resolve.alias
.set("@", resolve("src"))
.set("@img", resolve("src/assets/images"))
.set("@css", resolve("src/assets/styles/css"))
.set("@scss", resolve("src/assets/styles/scss"));
// 生产环境配置
if (isProduction) {
// 删除预加载
config.plugins.delete('preload');
config.plugins.delete('prefetch');
// 压缩代码
config.optimization.minimize(true);
// 分割代码
config.optimization.splitChunks({
chunks: 'all'
})
// 生产环境注入cdn
config.plugin('html')
.tap(args => {
args[0].cdn = cdn;
return args;
});
}
},
configureWebpack: config => {
if (isProduction) {
// 用cdn方式引入
config.externals = {
'vue': 'Vue',
'vuex': 'Vuex',
'vue-router': 'VueRouter',
'axios': 'axios'
}
// 为生产环境修改配置...
config.plugins.push(
//生产环境自动删除console
new UglifyJsPlugin({
uglifyOptions: {
compress: {
warnings: false,
drop_debugger: true,
drop_console: true,
},
},
sourceMap: false,
parallel: true,
})
);
} else {
// 为开发环境修改配置...
}
},
// 生产环境是否生成 sourceMap 文件
productionSourceMap: false,
// css相关配置
css: {
// 是否使用css分离插件 ExtractTextPlugin
extract: true,
// 开启 CSS source maps?
sourceMap: false,
// css预设器配置项
loaderOptions: {
// pass options to sass-loader
sass: {
// 引入全局变量样式
data: `
@import "@/stylePath/theme.scss;
`
}
},
// 启用 CSS modules for all css / pre-processor files.
modules: false,
},
// use thread-loader for babel & TS in production build
// enabled by default if the machine has more than 1 cores
parallel: require('os').cpus().length > 1,
devServer: {
port: 8888, // 端口
open: true, // 自动开启浏览器
compress: false, // 开启压缩
overlay: {
warnings: true,
errors: true
}
},
}
html:
<!DOCTYPE html> <html lang="zh"> <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"> <!-- 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="preload" as="style"> <link href="<%= htmlWebpackPlugin.options.cdn.css[i] %>" rel="stylesheet"> <% } %> <!-- 使用CDN的JS文件 --> <% for (var i in htmlWebpackPlugin.options.cdn && htmlWebpackPlugin.options.cdn.js) { %> <link href="<%= htmlWebpackPlugin.options.cdn.js[i] %>" rel="preload" as="script"> <% } %> </head> <body> <noscript> <strong>We're sorry but eye-admin doesn't work properly without JavaScript enabled. Please enable it to continue.</strong> </noscript> <div id="app"></div> <!-- built files will be auto injected --> <% for (var i in htmlWebpackPlugin.options.cdn && htmlWebpackPlugin.options.cdn.js) { %> <script src="<%= htmlWebpackPlugin.options.cdn.js[i] %>"></script> <% } %> </body> </html>
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