pure-react.js

const Pet = () => {
  return React.createElement(
    'div', {},
    [
      React.createElement('h4', {}, 'Luna'),
      React.createElement('h5', {}, 'Dog'),
      React.createElement('h5', {}, 'Pug'),
    ],
  )
}
const App = () => {
  return React.createElement(
    'div', {},
    React.createElement(
      'h3', {}, '-- Adopt me! --',
      React.createElement(Pet),
      React.createElement('h4', {}, '----'),
      React.createElement(Pet),
      React.createElement('h4', {}, '----'),
      React.createElement(Pet),
      React.createElement('h4', {}, '----')
    ),
  );
};

ReactDOM.render(React.createElement(App), document.getElementById('root'));