webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

const htmlWebpackPlugin = new HtmlWebpackPlugin({
  template: path.join(__dirname, 'examples/src/index.html'),
  filename: './index.html',
});

const copyWebpackPlugin = new CopyWebpackPlugin({
  patterns: [{ from: 'examples/src/assets', to: 'assets' }],
});

module.exports = {
  entry: path.join(__dirname, 'examples/src/index.js'),
  output: {
    path: path.join(__dirname, 'examples/dist'),
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: 'babel-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.scss$/,
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
    ],
  },
  plugins: [htmlWebpackPlugin, copyWebpackPlugin],
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  devServer: {
    port: 3000,
  },
};