如何从service worker中的indexedDB中检索数据？

const request = indexedDB.open('myDatabase', 1);

request.onupgradeneeded = function(event) {
  const db = event.target.result;
  const objectStore = db.createObjectStore('myObjectStore', { keyPath: 'id' });
  // 创建索引等操作
};

request.onsuccess = function(event) {
  const db = event.target.result;
  // 执行检索数据的操作
};

request.onerror = function(event) {
  // 处理错误
};

request.onsuccess = function(event) {
  const db = event.target.result;
  const transaction = db.transaction('myObjectStore', 'readonly');
  const objectStore = transaction.objectStore('myObjectStore');
  // 执行检索数据的操作
};

const request = objectStore.get('key');

request.onsuccess = function(event) {
  const data = event.target.result;
  // 处理检索到的数据
};

const request = objectStore.openCursor();

request.onsuccess = function(event) {
  const cursor = event.target.result;
  if (cursor) {
    const data = cursor.value;
    // 处理检索到的数据
    cursor.continue();
  }
};