webpack.config.js

var path = require("path");
var webpack = require("webpack");
const VueLoaderPlugin = require("vue-loader/lib/plugin");
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const CompressionPlugin = require("compression-webpack-plugin");

module.exports = {
  entry: ["babel-polyfill", "./src/main.js"],
  output: {
    path: path.resolve(__dirname, "./dist"),
    publicPath: "/dist/",
    filename: "build.js",
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ["vue-style-loader", "css-loader"],
      },
      {
        test: /\.scss$/,
        use: ["vue-style-loader", "css-loader", "sass-loader"],
      },
      {
        test: /\.vue$/,
        loader: "vue-loader",
        options: {
          loaders: {},
          // other vue-loader options go here
        },
      },
      {
        test: /\.js$/,
        loader: "babel-loader",
        exclude: /node_modules/,
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        loader: "file-loader",
        options: {
          name: "[name].[ext]?[hash]",
        },
      },
    ],
  },
  plugins: [
    // make sure to include the plugin!
    new VueLoaderPlugin(),
  ],
  resolve: {
    alias: {
      vue$: "vue/dist/vue.esm.js",
    },
    extensions: ["*", ".js", ".vue", ".json"],
  },
  devServer: {
    historyApiFallback: true,
    noInfo: true,
    overlay: true,
  },
  performance: {
    hints: false,
  },
  devtool: "#eval-source-map",
};

if (process.env.NODE_ENV === "production") {
  module.exports.mode = "production";
  module.exports.devtool = "#source-map";
  // http://vue-loader.vuejs.org/en/workflow/production.html
  module.exports.plugins = (module.exports.plugins || []).concat([
    new webpack.DefinePlugin({
      "process.env": {
        NODE_ENV: '"production"',
      },
    }),
    new CompressionPlugin({
      filename: "[path].gz[query]",
      algorithm: "gzip",
      test: new RegExp("\\.(js|css)$"),
      threshold: 10240,
      minRatio: 0.8,
    }),
  ]);
}