webpack.config.js

const webpack = require("webpack");
const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const path = require("path");

module.exports = {
  devtool: 'inline-source-map',
  entry: "./src/js/index.js",
  output: {
    filename: "bundle.js",
    path: path.resolve(__dirname, "dist")
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ["style-loader", "css-loader"]
      }, {
        test: /\.scss$/,
        use: [
          {
            loader: "style-loader" // creates style nodes from JS strings
          }, {
            loader: "css-loader" // translates CSS into CommonJS
          }, {
            loader: "sass-loader" // compiles Sass to CSS
          }
        ]
      }
    ]

  },
  plugins: [
    new UglifyJSPlugin({sourceMap: true}),
    new HtmlWebpackPlugin({template: "./src/index.html"})
  ]
};