React Change Icon on Click

<!DOCTYPE html>
<html lang="en">

<body>
    <div id="app">
        <h1>How to Change Icon on Click in Javascript</h1>
        <button id="toggleButton"><i class="mdi mdi-fullscreen"></i></button>
    </div>

const handleClick = () => {
                isIconClicked = !isIconClicked;
                toggleButton.style.backgroundColor = isIconClicked ? "#ff0000" : "#4caf50";
                toggleButton.innerHTML = isIconClicked ? '<i class="mdi mdi-fullscreen-exit"></i>' : '<i class="mdi mdi-fullscreen"></i>';
            };

toggleButton.addEventListener("click", handleClick);
        });
    </script>
    <style>
        * {
            box-sizing: border-box;
        }
    
        #app {
            text-align: center;
            margin: 20px;
        }
    
        #toggleButton {
            background-color: #4caf50;
            color: #fff;
            padding: 10px 20px;
            font-size: 16px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
    
        #toggleButton:hover {
            background-color: #45a049;
        }
    
        #toggleButton i {
            font-size: 25px;
        }
    </style>
</body>

</html>