webpack.config.js

const path = require("path");
const webpack = require("webpack");
const BundleTracker = require("webpack-bundle-tracker");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const TerserPlugin = require("terser-webpack-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");

module.exports = {
  context: __dirname,
  entry: {
    main: "./assets/js/index",
    pairingDisplay: "./assets/js/pairingDisplay",
    publicDisplay: "./assets/js/publicDisplay",
  },
  optimization: {
    minimizer: [new TerserPlugin(), new CssMinimizerPlugin()],
  },
  output: {
    path: path.resolve("./assets/webpack_bundles/"),
    publicPath: "/static/webpack_bundles/",
    filename: "[name]-[hash].js",
  },
  module: {
    rules: [
      {
        test: /\.css/,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
      {
        test: /\.(png|jpe?g|gif)$/,
        use: [
          {
            loader: "file-loader",
            options: {},
          },
        ],
      },
      {
        test: /\.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          "css-loader", // translates CSS into CommonJS
          "sass-loader", // compiles Sass to CSS, using Node Sass by default
        ],
      },
      {
        test: /\.js$/,
        exclude: /(node_modules)/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-env"],
          },
        },
      },
    ],
  },
  resolve: {
    alias: {
      jquery: "jquery/src/jquery",
    },
    extensions: [".js", ".scss", ".css"],
  },

  plugins: [
    new BundleTracker({ filename: "./webpack-stats.json" }),
    new MiniCssExtractPlugin({
      filename: "[name].css",
      chunkFilename: "[id].css",
    }),
    new webpack.ProvidePlugin({
      // inject ES5 modules as global vars
      $: "jquery",
      jQuery: "jquery",
      "window.jQuery": "jquery",
      Tether: "tether",
    }),
  ],
};