webpack.config.js

const path = require("path");
const CopyPlugin = require("copy-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const { template } = require("@babel/core");

module.exports = {
  entry: './src/main.js',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.[contenthash].js',
    clean: true
  },
  devtool: 'source-map',
  plugins: [
    new CopyPlugin({
      patterns: [{
        from: 'public',
        globOptions: {
          ignore: ['**/index.html']
        }
      },
      ],
    }),
    new HtmlWebpackPlugin(
      {
        template: 'public/index.html',
      }
    )
  ],
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /(node_modules)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          },
        },
      },
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader']
      }
    ]
  }
}