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

module.exports = {
  mode: 'development',
  entry: './src/index.js',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
    clean: true,
  },
  devServer: {
    static: './dist',
    hot: true,
    open: true,
  },
  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              ['@babel/preset-env', {
                targets: {
                  esmodules: true
                }
              }]
            ]
          }
        }
      }
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/index.html',
      title: 'Timer App',
    }),
    new CopyPlugin({
      patterns: [
        { from: 'src/styles.css', to: 'styles.css' }
      ],
    }),
  ],
  resolve: {
    extensions: ['.js', '.mjs']
  }
};