webpack.config.js

const path = require('path')

module.exports = {
  entry: './src/index.js',
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              '@babel/preset-env',
              '@babel/preset-react'
            ]
          }
        }
      }
    ]
  },
  resolve: {
    extensions: ['.js', '.jsx']
  },
  output: {
    filename: 'main.js',
    path: path.resolve(__dirname, 'dist')
  },
  mode: 'development',
  devServer: {
    contentBase: './dist',
    open: true,
    hot: true
  }
}