如何使用useEffect更好地设置fetch？

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

function DataFetchingComponent() {
  const [data, setData] = useState(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState(null);

  useEffect(() => {
    const fetchData = async () => {
      try {
        const response = await fetch('https://api.example.com/data');
        if (!response.ok) {
          throw new Error('Network response was not ok');
        }
        const result = await response.json();
        setData(result);
      } catch (err) {
        setError(err);
      } finally {
        setLoading(false);
      }
    };

    fetchData();
  }, []); // 空数组表示只在组件挂载时执行

  if (loading) return <div>Loading...</div>;
  if (error) return <div>Error: {error.message}</div>;

  return (
    <div>
      <h1>Data:</h1>
      <pre>{JSON.stringify(data, null, 2)}</pre>
    </div>
  );
}

export default DataFetchingComponent;

useEffect(() => {
  const controller = new AbortController();
  const signal = controller.signal;

  const fetchData = async () => {
    try {
      const response = await fetch('https://api.example.com/data', { signal });
      if (!response.ok) {
        throw new Error('Network response was not ok');
      }
      const result = await response.json();
      setData(result);
    } catch (err) {
      if (err.name === 'AbortError') {
        console.log('Fetch aborted');
      } else {
        setError(err);
      }
    } finally {
      setLoading(false);
    }
  };

  fetchData();

  return () => {
    controller.abort();
  };
}, []);