React Js Text Input Allow Only Number

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <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://unpkg.com/@babel/standalone@7.14.7/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React;

function App() {
            const [numericInput, setNumericInput] = useState("");
            const [errorMessage, setErrorMessage] = useState("");

return (
                <div>
                    <h3>React Js Text Input allow Only Number</h3>
                    <input
                        type="text"
                        value={numericInput}
                        onChange={filterNonNumeric}
                    />
                    {errorMessage && <div style={{ color: "red" }}>{errorMessage}</div>}
                </div>
            );
        }
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        div {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin-top: 20px;
        }

h3 {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 10px;
        }

input {
            padding: 12px 16px;
            font-size: 18px;
            border: 2px solid #ddd;
            border-radius: 8px;
            background-color: #f8f8f8;
            color: #333;
            transition: border-color 0.2s ease-in-out;
            width: 100%;
            max-width: 400px;
        }

input:focus {
            outline: none;
            border-color: #0077cc;
            box-shadow: 0 0 0 3px rgba(0, 119, 204, 0.3);
        }

div>div {
            margin-top: 10px;
        }
    </style>
</body>

</html>

 
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <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://unpkg.com/@babel/standalone@7.14.7/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React;
​
        function App() {
            const [numericInput, setNumericInput] = useState("");
            const [errorMessage, setErrorMessage] = useState("");
​
            const filterNonNumeric = (e) => {
                // Replace non-numeric characters with an empty string
                let input = e.target.value.replace(/[^0-9]/g, "");
                if (input !== e.target.value) {
                    // Input was invalid, set error message
                    setErrorMessage("Only numeric characters are allowed.");
                } else {
                    // Input was valid, clear error message
                    setErrorMessage("");
                }
                setNumericInput(input);
            };
​
            return (
                <div>
                    <h3>React Js Text Input allow Only Number</h3>
                    <input
                        type="text"
                        value={numericInput}
                        onChange={filterNonNumeric}
                    />
                    {errorMessage && <div style={{ color: "red" }}>{errorMessage}</div>}
                </div>
            );
        }
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        div {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin-top: 20px;
        }
​
        h3 {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 10px;
        }
​
        input {
            padding: 12px 16px;
            font-size: 18px;
            border: 2px solid #ddd;
            border-radius: 8px;
            background-color: #f8f8f8;
            color: #333;
            transition: border-color 0.2s ease-in-out;
            width: 100%;
            max-width: 400px;
        }
​
        input:focus {
            outline: none;
            border-color: #0077cc;
            box-shadow: 0 0 0 3px rgba(0, 119, 204, 0.3);
        }
​
​
        div>div {
            margin-top: 10px;
        }
    </style>
</body>
​
</html>