特定的React模型有时无法加载，需要重新渲染

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

function MyComponent({ initialData }) {
  const [data, setData] = useState(initialData);

  useEffect(() => {
    // 模拟异步数据获取
    const fetchData = async () => {
      const response = await fetch('https://api.example.com/data');
      const result = await response.json();
      setData(result);
    };

    fetchData();
  }, []); // 空依赖数组确保只在组件挂载时执行一次

  return (
    <div>
      {data ? <p>{data.message}</p> : <p>Loading...</p>}
    </div>
  );
}

useEffect(() => {
  let isMounted = true;

  const fetchData = async () => {
    const response = await fetch('https://api.example.com/data');
    const result = await response.json();
    if (isMounted) {
      setData(result);
    }
  };

  fetchData();

  return () => {
    isMounted = false; // 清理函数，防止组件卸载后更新状态
  };
}, []);

import React, { memo, useMemo } from 'react';

const MyComponent = memo(({ data }) => {
  const processedData = useMemo(() => processData(data), [data]);

  return (
    <div>
      {processedData.map(item => <p key={item.id}>{item.name}</p>)}
    </div>
  );
});