使用Promises迭代删除IndexedDb中的项目

function deleteItemsFromIndexedDB() {
  return new Promise((resolve, reject) => {
    const request = indexedDB.open('myDatabase', 1);

    request.onerror = (event) => {
      reject('Failed to open database');
    };

    request.onsuccess = (event) => {
      const db = event.target.result;
      const transaction = db.transaction('myObjectStore', 'readwrite');
      const objectStore = transaction.objectStore('myObjectStore');

      const deleteRequest = objectStore.openCursor();

      deleteRequest.onerror = (event) => {
        reject('Failed to open cursor');
      };

      deleteRequest.onsuccess = (event) => {
        const cursor = event.target.result;

        if (cursor) {
          cursor.delete();
          cursor.continue();
        } else {
          resolve('Items deleted successfully');
        }
      };
    };

    request.onupgradeneeded = (event) => {
      const db = event.target.result;
      db.createObjectStore('myObjectStore', { keyPath: 'id' });
    };
  });
}

deleteItemsFromIndexedDB()
  .then((message) => {
    console.log(message);
  })
  .catch((error) => {
    console.error(error);
  });