function useToggle(initialValue = false) {
    const [value, setValue] = useState(initialValue);

    const toggle = useCallback(() => {
        setValue(v => !v);
    }, []);

    const setTrue = useCallback(() => setValue(true), []);
    const setFalse = useCallback(() => setValue(false), []);

    return { value, toggle, setTrue, setFalse };
}

// Utilisation
function Modal() {
    const { value: isOpen, toggle, setFalse: close } = useToggle();

    return (
        <div>
            <button onClick={toggle}>Ouvrir/Fermer</button>
            {isOpen && (
                <div className="modal">
                    <p>Contenu du modal</p>
                    <button onClick={close}>Fermer</button>
                </div>
            )}
        </div>
    );
}