webpack.config.js

const path = require("path");
const webpack = require("webpack");
require("babel-polyfill");

function resolve(dir) {
  return path.join(__dirname, "./", dir);
}
module.exports = {
  entry: ["babel-polyfill", "./src/main.js"],
  output: {
    path: path.resolve(__dirname, "./dist"),
    publicPath: "/dist/",
    filename: "build.js",
  },
  resolve: {
    extensions: [".js", ".vue"],
    alias: {
      vue$: "vue/dist/vue.esm.js",
      public: path.resolve(__dirname, "./public"),
      "@": resolve("src"),

    },
  },
  module: {
    rules: [
      {
        test: /\.(js|vue)$/,
        loader: "eslint-loader",
        enforce: "pre",
        include: [resolve("src")],
        options: {
          // eslint-disable-next-line global-require
          formatter: require("eslint-friendly-formatter"),
        },
      },
      {
        test: /\.vue$/,
        loader: "vue-loader",
        options: {
          loaders: {
            // Since sass-loader (weirdly) has SCSS as its default parse mode, we map
            // the "scss" and "sass" values for the lang attribute to the right configs here.
            // other preprocessors should work out of the box, no loader config like this necessary.
            scss: "vue-style-loader!css-loader!sass-loader",
            sass: "vue-style-loader!css-loader!sass-loader?indentedSyntax",
          },
          // other vue-loader options go here
        },
      },
      {
        test: /\.js$/,
        loader: "babel-loader",
        exclude: /node_modules/,
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        loader: "file-loader",
        options: {
          objectAssign: "Object.assign",
        },
      },
      {
        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
        loader: "url-loader",
      },
      {
        test: /\.css$/,
        loader: ["style-loader", "css-loader"],
      },
      {
        test: /\.styl$/,
        loader: ["style-loader", "css-loader", "stylus-loader"],
      },
      {
        test: /\.(scss|sass)$/,

        loader: ["sass-loader"],
      },
    ],
  },
  devServer: {
    historyApiFallback: true,
    noInfo: true,
  },
  performance: {
    hints: false,
  },
  devtool: "#eval-source-map",
};

if (process.env.NODE_ENV === "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 webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      compress: {
        warnings: false,
      },
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true,
    }),
  ]);
}