webpack.config.js

var path = require('path');

module.exports = {
  entry: './src/datetime.jsx',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'react-semantic-ui.min.js',
    libraryTarget: 'commonjs2' // THIS IS THE MOST IMPORTANT LINE! :mindblow: I wasted more than 2 days until realize this was the line most important in all this guide.
  },
  mode:"production",
  module: {
    rules: [
      {
        test: /\.jsx$/,
        include: path.resolve(__dirname, 'src'),
        exclude: /(node_modules|bower_components|build)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['env']
          }
        }
      }
    ]
  },
  externals: {
    'react': 'commonjs react', // this line is just to use the React dependency of our parent-testing-project instead of using our own React.
    'semantic-ui-react': 'commonjs semantic-ui-react',
    'moment': 'commonjs moment'
  }
};