webpack.config.js

const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack'); //to access built-in plugins
const path = require("path");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  mode: "production",

  entry: { //Juntar distintos archivos js para una única salida (index.bundle.js)
    index: [
      "./src/assets/js/main.js"
    ],
  },

  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "assets/js/[name].bundle.js",
  },

  plugins: [
    new HtmlWebpackPlugin({
      template: "./src/index.html",
      minify: {
        collapseWhitespace: true,
        removeComments: true,
        removeRedundantAttributes: true,
        removeScriptTypeAttributes: true,
        removeStyleLinkTypeAttributes: true,
        useShortDoctype: true,
      },
    }),
    new MiniCssExtractPlugin({
      filename: "assets/css/bundle.css",
    }),
  ],

  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-env"],
            plugins: ["@babel/plugin-proposal-object-rest-spread"],
          },
        },
      },
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
      {
        test: /\.s[ac]ss$/i,
        use: [
          // Creates `style` nodes from JS strings
          MiniCssExtractPlugin.loader,
          // Translates CSS into CommonJS
          "css-loader",
          // Compiles Sass to CSS
          "sass-loader",
        ],
      },
      {
        test: /\.(png|jpe?g|gif)$/i,
        use: [
          {
            loader: "file-loader",
            options: {
              name: "assets/img/[name].[ext]",
            },
          },
        ],
      },
    ],
  },
};