vue.config.js

const BundleAnalyzerPlugin = require("webpack-bundle-analyzer")
  .BundleAnalyzerPlugin;
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const CompressionWebpackPlugin = require("compression-webpack-plugin");
// const zopfli = require("@gfx/zopfli");
// const BrotliPlugin = require("brotli-webpack-plugin");
const AliOssPlugin = require("webpack-oss");

const path = require("path");
const PurgecssPlugin = require("purgecss-webpack-plugin");
const glob = require("glob-all");

const resolve = dir => path.join(__dirname, dir);
const IS_PROD = ["production", "prod"].includes(process.env.NODE_ENV);
const productionGzipExtensions = /\.(js|css|json|txt|html|ico|svg)(\?.*)?$/i;

module.exports = {
  baseUrl: IS_PROD ? process.env.VUE_APP_SRC || "/" : "./", // 默认'/'，部署应用包时的基本 URL
  outputDir: process.env.outputDir || "dist", // 'dist', 生产环境构建文件的目录
  assetsDir: "", // 相对于outputDir的静态资源(js、css、img、fonts)目录
  lintOnSave: false,
  runtimeCompiler: true, // 是否使用包含运行时编译器的 Vue 构建版本
  productionSourceMap: false, // 生产环境的 source map

  configureWebpack: config => {
    // cdn引用时配置externals
    // config.externals = {
    //     'vue': 'Vue',
    //     'element-ui': 'ELEMENT',
    //     'vue-router': 'VueRouter',
    //     'vuex': 'Vuex',
    //     'axios': 'axios'
    // }

    if (IS_PROD) {
      const plugins = [];

      plugins.push(
        new PurgecssPlugin({
          paths: glob.sync([
            path.join(__dirname, "./src/index.html"),
            path.join(__dirname, "./**/*.vue"),
            path.join(__dirname, "./src/**/*.js")
          ])
        })
      );

      plugins.push(
        new UglifyJsPlugin({
          uglifyOptions: {
            compress: {
              warnings: false,
              drop_console: true,
              drop_debugger: false,
              pure_funcs: ["console.log"] //移除console
            }
          },
          sourceMap: false,
          parallel: true
        })
      );
      plugins.push(
        new CompressionWebpackPlugin({
          filename: "[path].gz[query]",
          algorithm: "gzip",
          test: productionGzipExtensions,
          threshold: 10240,
          minRatio: 0.8
        })
      );

      // 上传文件到oss
      //if (process.env.ACCESS_KEY_ID || process.env.ACCESS_KEY_SECRET || process.env.REGION || process.env.BUCKET || process.env.PREFIX) {
      //    plugins.push(
      //        new AliOssPlugin({
      //            accessKeyId: process.env.ACCESS_KEY_ID,
      //            accessKeySecret: process.env.ACCESS_KEY_SECRET,
      //            region: process.env.REGION,
      //            bucket: process.env.BUCKET,
      //            prefix: process.env.PREFIX,
      //            exclude: /.*\.html$/,
      //            deleteAll: false
      //        })
      //    );
      //}

      // Zopfli压缩，需要响应VC库 https://webpack.js.org/plugins/compression-webpack-plugin/
      // plugins.push(
      //     new CompressionWebpackPlugin({
      //         algorithm(input, compressionOptions, callback) {
      //             return zopfli.gzip(input, compressionOptions, callback);
      //         },
      //         compressionOptions: {
      //             numiterations: 15
      //         },
      //         minRatio: 0.99,
      //         test: productionGzipExtensions
      //     })
      // );
      // plugins.push(
      //     new BrotliPlugin({
      //         test: productionGzipExtensions,
      //         minRatio: 0.99
      //     })
      // );
      config.plugins = [...config.plugins, ...plugins];
    }
  },
  chainWebpack: config => {
    // 修复HMR
    config.resolve.symlinks(true);

    // 修复Lazy loading routes Error： Cyclic dependency  [https://github.com/vuejs/vue-cli/issues/1669]
    config.plugin("html").tap(args => {
      args[0].chunksSortMode = "none";
      return args;
    });

    // 添加别名
    config.resolve.alias
      .set("@", resolve("src"))
      .set("assets", resolve("src/assets"))
      .set("components", resolve("src/components"))
      .set("layout", resolve("src/layout"))
      .set("base", resolve("src/base"))
      .set("static", resolve("src/static"));

    // 打包分析
    if (process.env.IS_ANALYZ) {
      config.plugin("webpack-report").use(BundleAnalyzerPlugin, [
        {
          analyzerMode: "static"
        }
      ]);
    }

    // 多页面配置，为js添加hash
    // config.output.chunkFilename(`js/[name].[chunkhash:8].js`)

    // 修改图片输出路径
    // config.module
    //   .rule('images')
    //   .test(/\.(png|jpe?g|gif|ico)(\?.*)?$/)
    //   .use('url-loader')
    //   .loader('url-loader')
    //   .options({
    //       name: path.join('../assets/', 'img/[name].[ext]')
    //   })
  },
  css: {
    modules: false,
    extract: IS_PROD,
    // 为css后缀添加hash
    // extract: {
    //  filename: 'css/[name].[hash:8].css',
    //  chunkFilename: 'css/[name].[hash:8].css'
    //}，
    sourceMap: false,
    loaderOptions: {
      sass: {
        // 向全局sass样式传入共享的全局变量
        // data: `@import "~assets/scss/variables.scss";$src: "${process.env.VUE_APP_SRC}";`
        data: `$src: "${process.env.VUE_APP_SRC}";`
      }
      // px转换为rem
      // postcss: {
      //   plugins: [
      //     require('postcss-pxtorem')({
      //       rootValue : 1, // 换算的基数
      //       selectorBlackList  : ['weui', 'el'], // 忽略转换正则匹配项
      //       propList   : ['*']
      //     })
      //   ]
      // }
    }
  },
  pluginOptions: {
    // 安装vue-cli-plugin-style-resources-loader插件
    // 添加全局样式global.scss
    // "style-resources-loader": {
    //   preProcessor: "scss",
    //   patterns: [
    //     resolve(__dirname, "./src/scss/scss/variables.scss")
    //   ]
    // }
  },
  parallel: require("os").cpus().length > 1,
  pwa: {},
  devServer: {
    // overlay: {
    //   warnings: true,
    //   errors: true
    // },
    open: IS_PROD,
    host: "0.0.0.0",
    port: 8000,
    https: false,
    hotOnly: false,
    proxy: {
      "/api": {
        target: process.env.VUE_APP_BASE_API || "http://127.0.0.1:8080",
        changeOrigin: true
      }
    }
  }
};