React Js String Replace Method

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
</head>
<body>
    <div id="app"></div>
    <script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
    <script src="https://unpkg.com/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>

function App() {
            const [text, setText] = useState('Welcome to fontawesomeicons');
            const [searchTerm, setSearchTerm] = useState('welcome');
            const [replaceTerm, setReplaceTerm] = useState('Thanks for visting');

const handleTextChange = (event) => {
                setText(event.target.value);
            };

const handleSearchTermChange = (event) => {
                setSearchTerm(event.target.value);
            };

const handleReplaceTermChange = (event) => {
                setReplaceTerm(event.target.value);
            };

const handleReplace = () => {
                setText(text.replace(new RegExp(searchTerm, 'gi'), replaceTerm));
                alert('Replaced successfully')
            };

return (
                <div className='container'>
                    <h3>React Js Find and Replace Method</h3>
                    <textarea value={text} onChange={handleTextChange} />
                    <label>Find Text</label>
                    <input
                        type="text"
                        placeholder="Search term"
                        value={searchTerm}
                        onChange={handleSearchTermChange}
                    />
                    <label>replace text</label>
                    <input
                        type="text"
                        placeholder="Replace term"
                        value={replaceTerm}
                        onChange={handleReplaceTermChange}
                    />
                    <button onClick={handleReplace}>Replace</button>

</div>
            );
        }

ReactDOM.render(<App />, document.getElementById("app"));
    </script>

.container {
            margin: 0 auto;
            width: 500px;
            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);
            padding: 20px;
        }

textarea {
            width: 100%;
            height: 200px;
            padding: 10px;
            margin-bottom: 10px;
            resize: none;
        }

label {
            font-weight: bold;
            margin-bottom: 5px;
        }

input[type="text"] {
            width: 100%;
            padding: 8px;
            margin-bottom: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
        }

button {
            padding: 10px 20px;
            background-color: #4caf50;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

button:hover {
            background-color: #45a049;
        }
    </style>
</body>

</html>