React Input Mask

<!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 } = React;
    function App() {
      const [pin, setPin] = useState('');

const handlePinChange = (e) => {
        const value = e.target.value;
        const maskedValue = value.replace(/\D/g, '').slice(0, 4); // Allow only digits and limit length to 4
        setPin(maskedValue);
      };

return (
        <div className='container'>
          <h3>React Js Input Mask for 4 Digit Pin</h3>
          <label className='label'>4 Digit Pin:</label>
          <input
            className='input'
            type="text"
            value={pin}
            onChange={handlePinChange}
            placeholder="Enter 4-digit PIN"
            maxLength={4}
          />
        </div>

);
    }

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

}

.label {
      font-size: 16px;
      margin-bottom: 10px;
    }

.input {
      width: 100%;
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 16px;
      outline: none;
      transition: border-color 0.3s;
    }

.input::placeholder {
      color: #999;
    }

.input:focus {
      border-color: #007bff;
    }
  </style>
</body>

</html>