使用React钩子的冗余代码片段

import React, { useState, useEffect } from 'react';

const MyComponent = () => {
  const [data, setData] = useState(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    fetchData();
  }, []);

  const fetchData = async () => {
    try {
      setLoading(true);
      const response = await fetch('https://api.example.com/data');
      const jsonData = await response.json();
      setData(jsonData);
      setLoading(false);
    } catch (error) {
      console.error('Error fetching data:', error);
    }
  };

  if (loading) {
    return <div>Loading...</div>;
  }

  return (
    <div>
      {data && (
        <ul>
          {data.map(item => (
            <li key={item.id}>{item.name}</li>
          ))}
        </ul>
      )}
    </div>
  );
};

export default MyComponent;