React Js Check Value Positive or Negative Integer

<!DOCTYPE html>
<html>

</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    const { useState } = React;

function App() {
      const [number, setNumber] = useState(0);
      const [result, setResult] = useState('');

return (
        <div className='container'>
          <h3>React Js Check Positive/Negative Integer Checker</h3>
          <input
            type="number"
            placeholder="Enter a number"
            value={number}
            onChange={(e) => setNumber(parseInt(e.target.value))}
          />
          <button onClick={checkNumber}>Check</button>
          <p>{result}</p>
        </div>
      );
    }

ReactDOM.render(<App />, document.getElementById('app'));
  </script>
  <style>
    /* Container */
    .container {
      font-family: Arial, sans-serif;
      max-width: 800px;
      margin: 0 auto;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
      text-align: center;
    }

h3 {
      font-size: 24px;
      color: #333;
      margin-bottom: 20px;
    }

input[type="number"] {
      width: 100%;
      padding: 10px;
      margin-bottom: 10px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 16px;
    }

button {
      background-color: #007bff;
      color: #fff;
      border: none;
      border-radius: 5px;
      padding: 10px 20px;
      font-size: 16px;
      cursor: pointer;
      transition: background-color 0.3s;
    }

button:hover {
      background-color: #0056b3;
    }

p {
      font-size: 18px;
      margin-top: 10px;
      font-weight: bold;
      color: #333;
    }
  </style>
</body>

</html>