webpack.config.js

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

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'js/bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        },
      }, {
        test: /\.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          { loader: 'css-loader' },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true,
            },
          },
        ],
      },
      {
        test: /\.ya?ml$/,
        use: 'js-yaml-loader',
      },
    ],
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: 'css/bundle.css',
    }),
    new HtmlWebpackPlugin({
      template: 'src/index.html',
    }),
  ],
  devServer: {
    client: {
      overlay: {
        errors: true,
        warnings: false,
      },
    },
    static: {
      directory: path.join(__dirname, 'dist'),
    },
  },
  devtool: 'source-map',
};