React Js Generate Random Password

<!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 [difficulty, setDifficulty] = useState('easy');
      const [password, setPassword] = useState('');
      const [passwordLength, setPasswordLength] = useState(8);
      const generatePassword = (difficulty, length) => {
        let characters = '';
        switch (difficulty) {
          case 'easy':
            characters = 'abcdefghijklmnopqrstuvwxyz';
            break;
          case 'medium':
            characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
            break;
          case 'hard':
            characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_+-=[]{}|;:\'",.<>/?`~';
            break;
          default:
            characters = 'abcdefghijklmnopqrstuvwxyz';
            break;
        }

let newPassword = '';
        for (let i = 0; i < length; i++) {
          newPassword += characters.charAt(Math.floor(Math.random() * characters.length));
        }

return newPassword;
      };

const handleGenerate = () => {
        const newPassword = generatePassword(difficulty, passwordLength);
        setPassword(newPassword);
      };

return (
        <div className='container'>
          <h3 className='title'>React Js Password Generator</h3>
          <label className='label'>Difficulty: </label>
          <select className='select' onChange={(e) => setDifficulty(e.target.value)}>
            <option value="easy">Easy</option>
            <option value="medium">Medium</option>
            <option value="hard">Hard</option>
          </select>
          <label className='label'>Password Length: </label>
          <input
            className='input'
            type="number"
            value={passwordLength}
            onChange={(e) => setPasswordLength(parseInt(e.target.value))}
            min="1"
          />
          <button className='button' onClick={handleGenerate}>Generate Password</button>
          <p className='password'>Password: {password}</p>
        </div>

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

.container {
      margin: 0 auto;
      width: 600px;
      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;
    }

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

.label {
      font-size: 18px;
      margin-right: 10px;
      color: #333;
    }

.select,
    .input {
      padding: 10px;
      font-size: 16px;
      border: 1px solid #ccc;
      border-radius: 5px;
      margin-bottom: 10px;
      width: 100%;
    }

.select:focus,
    .input:focus {
      outline: none;
      border-color: #007bff;
      box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
    }

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

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

.password {
      font-size: 18px;
      margin-top: 20px;
      color: #333;
    }
  </style>
</body>

</html>