Notes4.js

import React from 'react';
import ReactDOM from 'react-dom';

let message;

if (user.age >= drinkingAge) {
  message = (
    <h1>
      Hey, check out this alcoholic beverage!
    </h1>
  );
} else {
  message = (
    <h1>
      Hey, check out these earrings I got at Claire's!
    </h1>
  );
}

ReactDOM.render(
  message, 
  document.getElementById('app')
);