js如何清除所有缓存数据库

// 清除所有 localStorage 数据
localStorage.clear();

// 清除所有 sessionStorage 数据
sessionStorage.clear();

function openDB(dbName) {
  return new Promise((resolve, reject) => {
    const request = indexedDB.open(dbName, 1);

    request.onerror = event => reject(event.target.error);
    request.onsuccess = event => resolve(event.target.result);

    request.onupgradeneeded = event => {
      const db = event.target.result;
      // 创建对象存储空间等操作可以在这里进行
    };
  });
}

async function clearIndexedDB(dbName) {
  const db = await openDB(dbName);
  const transaction = db.transaction(db.objectStoreNames, 'readwrite');
  const objectStores = db.objectStoreNames;

  objectStores.forEach(storeName => {
    const store = transaction.objectStore(storeName);
    store.clear();
  });

  return new Promise((resolve, reject) => {
    transaction.oncomplete = () => resolve();
    transaction.onerror = event => reject(event.target.error);
  });
}

// 使用示例
clearIndexedDB('myDatabase').then(() => {
  console.log('IndexedDB 清除成功');
}).catch(error => {
  console.error('IndexedDB 清除失败', error);
});