webpack.config.js

const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");
const CopyPlugin = require("copy-webpack-plugin");
const devMode = process.env.NODE_ENV !== "production";

module.exports = {
  entry: path.resolve(__dirname, "src/index.js"),
  mode: process.env.NODE_ENV,
  output: {
    filename: "bundle.js",
    path: path.resolve(__dirname, "dist"),
  },
  devtool: devMode ? "inline-source-map" : "none",
  devServer: {
    contentBase: "./dist",
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      title: "Interactive Data Visualization Microsite",
      favicon: "./public/favicon.ico",
      template: "./src/index.html",
    }),
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: devMode ? "[name].css" : "[name].[hash].css",
      chunkFilename: devMode ? "[id].css" : "[id].[hash].css",
    }),
    new CopyPlugin({
      patterns: [{ from: "public", to: "public" }],
    }),
  ],
  module: {
    rules: [
      {
        test: /\.(csv|tsv)$/,
        use: ["csv-loader"],
      },
      {
        test: /\.m?js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: "babel-loader",
          options: {
            presets: [
              ["@babel/preset-env", { modules: false }],
              {
                plugins: ["@babel/plugin-proposal-class-properties"],
              },
            ],
          },
        },
      },
      {
        test: /\.s[ac]ss$/i,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              hmr: process.env.NODE_ENV === "development",
            },
          },
          // Translates CSS into CommonJS
          "css-loader",
          // Compiles Sass to CSS
          "sass-loader",
        ],
      },
      {
        test: /\.(gif|png|jpe?g|svg)$/i,
        use: [
          "file-loader",
          {
            loader: "image-webpack-loader",
            options: {
              bypassOnDebug: true, // webpack@1.x
              disable: true, // webpack@2.x and newer
            },
          },
        ],
      },
      {
        test: /\.(woff|woff2|eot|ttf|otf)$/,
        use: ["file-loader"],
      },
    ],
  },
};