React Js Set Placeholder on Input Field

<!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://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 [isLogged, setIsLogged] = useState(false);

return (
        <div className='container'>
          <h3>React Js conditionally set the placeholder prop on an input field</h3>
          <input
            type="text"
            placeholder={isLogged ? 'Welcome back!' : 'Please log in'}
          />
          <button onClick={() => setIsLogged(!isLogged)}>
            {isLogged ? 'Log Out' : 'Log In'}
          </button>
        </div>
      );
    }
    ReactDOM.render(<App />, document.getElementById('app'));
  </script>

}

input[type="text"] {
      width: 100%;
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 4px;
      font-size: 16px;
      margin-bottom: 10px;
      box-sizing: border-box;
    }

input[type="text"]:focus {
      border-color: #3498db;
      box-shadow: 0 0 6px rgba(52, 152, 219, 0.5);
    }
  </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://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 [isLogged, setIsLogged] = useState(false);
​
      return (
        <div className='container'>
          <h3>React Js conditionally set the placeholder prop on an input field</h3>
          <input
            type="text"
            placeholder={isLogged ? 'Welcome back!' : 'Please log in'}
          />
          <button onClick={() => setIsLogged(!isLogged)}>
            {isLogged ? 'Log Out' : 'Log In'}
          </button>
        </div>
      );
    }
    ReactDOM.render(<App />, document.getElementById('app'));
  </script>
​
  <style>
    .container {
      max-width: 500px;
      margin: 0 auto;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
      text-align: center;
​
    }
​
    input[type="text"] {
      width: 100%;
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 4px;
      font-size: 16px;
      margin-bottom: 10px;
      box-sizing: border-box;
    }
​
    input[type="text"]:focus {
      border-color: #3498db;
      box-shadow: 0 0 6px rgba(52, 152, 219, 0.5);
    }
  </style>
</body>
​
</html>