사용자 정의 React 쿼리 데이터베이스 플러그인을 작성하는 방법

import { useQuery, useMutation } from 'react-query';

// 导入和设置数据库，这里以 IndexedDB 为例
import { openDB } from 'idb';

const dbPromise = openDB('myDatabase', 1, {
  upgrade(db) {
    db.createObjectStore('myData');
  },
});

async function useCustomCache(key) {
  const db = await dbPromise;
  const tx = db.transaction('myData', 'readwrite');
  const store = tx.objectStore('myData');

  const query = useQuery(key, async () => {
    const data = await fetch(`https://api.example.com/data/${key}`);
    await store.put(data, key);
    return data;
  });

  const mutation = useMutation(async (newData) => {
    await fetch(`https://api.example.com/data/${key}`, {
      method: 'PUT',
      body: JSON.stringify(newData),
    });
    await store.put(newData, key);
  });

  return { ...query, ...mutation };
}

export default useCustomCache;

import useCustomCache from './useCustomCache';

function MyComponent() {
  const { data, isLoading, error, mutate } = useCustomCache('myData');

  if (isLoading) {
    return <p>Loading...</p>;
  }

  if (error) {
    return <p>Error: {error.message}</p>;
  }

  return (
    <div>
      <p>Data: {data}</p>
      <button onClick={() => mutate('newData')}>Update Data</button>
    </div>
  );
}

export default MyComponent;