Render di un elemento in React
import React from 'react';
import ReactDOM from 'react-dom';
ReactDOM.render(<h1>TODO List</h1>, document.getElementById('app'));
const toDoList = (
<ol>
<li>Learn React</li>
<li>Become a Developer</li>
</ol>
);
ReactDOM.render(
toDoList,
document.getElementById('app')
);