webpack.config.js

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

module.exports = {
  entry: './src/index.js',
  output: {
    filename: 'main.js',
    path: path.join(__dirname, 'dist'),
    clean: true,
  },
  mode: 'development',
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /(node_modules)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
            plugins: [
              '@babel/plugin-proposal-object-rest-spread',
              '@babel/plugin-transform-runtime',
            ],
          },
        },
      },
      {
        test: /\.html$/i,
        use: [
          {
            loader: 'html-loader',
            options: { sources: false },
          },
        ],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({ template: 'src/index.html' }),
    new CopyPlugin({ patterns: [{ from: 'src/assets', to: 'assets' }] }),
  ],
};