function RenderCounter() {
    const [count, setCount] = useState(0);
    const renderCount = useRef(0);

    // Incrémenté à chaque rendu, sans causer de re-rendu
    renderCount.current += 1;

    return (
        <div>
            <p>Count : {count}</p>
            <p>Rendus : {renderCount.current}</p>
            <button onClick={() => setCount(c => c + 1)}>+1</button>
        </div>
    );
}