React

Which of these is the recommended way to create a react app?

Assume there is an HTML element with the id body.

1/3

React.renderDOM(
  <h1>Hello, world!</h1>,
  document.getElementById('root')
);

ReactDOM.render(
  <h1>Hello, world!</h1>,
  document.getElementById('root')
);

React.renderDOM(
  <h1>Hello, world!</h1>,
  'root'
);

ReactDOM.render(
  <h1>Hello, world!</h1>,
  'root'
);