React Js get last item in map function

<!DOCTYPE html>
<html>

</head>

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

function App() {
      const array = ['Laptop', 'Mobile', 'Mouse', 'Keyboard'];

console.log({ mapped });

return (
        <div className='container'>
          <h3>React Js get last item in map function </h3>
          <ul>
            {mapped.map((item, index) => (
              <li key={index}>{item}</li>
            ))}
          </ul>
        </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: 10px;
    }

ul {
      list-style-type: none;
      padding: 0;
    }

li {
      font-size: 18px;
      color: #666;
      margin-bottom: 8px;
    }

/* Add hover effect to list items */
    li:hover {
      background-color: #ddd;
      cursor: pointer;
    }
  </style>
</body>

</html>