React js close modal onclick outside

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState, useRef, useEffect } = React;
        function App() {
            const [isModalOpen, setIsModalOpen] = useState(false);
            const modalRef = useRef(null);

useEffect(() => {
                const closeModalOnClickOutside = (event) => {
                    if (modalRef.current && !modalRef.current.contains(event.target)) {
                        closeModal();
                    }
                };

if (isModalOpen) {
                    document.addEventListener('mouseup', closeModalOnClickOutside);
                }

return () => {
                    document.removeEventListener('mouseup', closeModalOnClickOutside);
                };
            }, [isModalOpen]);

const openModal = () => {
                setIsModalOpen(true);
            };

const closeModal = () => {
                setIsModalOpen(false);
            };

return (
                <div className='container'>
                    <h3>React Close popup modal onclick outside</h3>
                    <button onClick={openModal} className="open-modal">Open Modal</button>
                    {isModalOpen && (
                        <div className="modal">
                            <div className="modal-content" ref={modalRef}>
                                <h3>React Close Modal When Clicked Outside</h3>
                                {/* Modal content here */}
                                <button className="close-button" onClick={closeModal}>Close</button>
                            </div>
                        </div>
                    )}
                </div>
            );
        }

ReactDOM.render(<App />, document.getElementById('app'));
    </script>
    <style>
        .container {
            text-align: center;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
            width: 600px;
            margin: 0 auto;
            padding: 20px;
        }

.modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            display: flex;
            justify-content: center;
            align-items: center;
        }

.modal-content {
            background-color: white;
            padding: 20px;
            border-radius: 5px;
            max-width: 400px;
        }

.open-modal {
            background-color: #007bff;
            color: #fff;
            padding: 10px 20px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

.close-button {
            background-color: #dc3545;
            color: #fff;
            padding: 10px 20px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            float: right
        }

/* Hover effect */
        .open-modal:hover,
        .close-button:hover {
            opacity: 0.8;
        }
    </style>

</body>

</html>