function LoginForm() {
    const emailRef = useRef(null);

    useEffect(() => {
        emailRef.current.focus();
    }, []);

    return (
        <form>
            <input ref={emailRef} type="email" placeholder="Email" />
            <input type="password" placeholder="Mot de passe" />
            <button type="submit">Connexion</button>
        </form>
    );
}