webpack.config.js

const path = require('path');

module.exports = {
  entry: path.join(__dirname, 'src/'),
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'index.js',
    library: '',
    libraryTarget: 'commonjs-module'
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ["@babel/env", "@babel/react"],
            plugins: [
              "@babel/plugin-proposal-object-rest-spread",
              "@babel/plugin-proposal-class-properties"
            ]
          }
        },
      },
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        loader: 'file-loader',
        query: {
          name: '[name].[ext]?[hash]'
        }
      }
    ]
  },
  resolve: {
    extensions: ['.js', '.jsx', '.css'],
  },
}