webpack.config.js

const path = require("path");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");

module.exports = {
  devtool: "source-map",
  entry: "./src/index.js",
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "bundle.[chunkhash].js"
  },
  mode: "production",
  resolve: {
    alias: {
      components: path.resolve(__dirname, "src/components/"),
      assets: path.resolve(__dirname, "src/assets/"),
      modules: path.resolve(__dirname, "src/modules/")
    }
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [{ loader: "babel-loader" }]
      },
      {
        test: /\.css$/,
        use: [{ loader: MiniCssExtractPlugin.loader }, { loader: "css-loader" }]
      }
    ]
  },
  devServer: {
    contentBase: path.join(__dirname, "dist")
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: "style.[chunkhash].css"
    }),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src", "index.html"),
      filename: "index.html"
    })
  ]
};