Retrieve Item from IndexedDB

function getFromIndexedDB(databaseName, storeName, id) {
  return new Promise((resolve, reject) => {
    const request = indexedDB.open(dbName);
 
    request.onsuccess = (event) => {
      const db = event.target.result;
      const transaction = db.transaction(storeName, "readonly");
      const store = transaction.objectStore(storeName);
 
      const getRequest = store.get(id);
 
      getRequest.onsuccess = () => resolve(getRequest.result || null);
      getRequest.onerror = () => reject(getRequest.error);
    };
 
    request.onerror = () => reject(request.error);
  });
}

retrieveItemFromIndexedDB("myDatabase", "users", 1)
  .then(console.log) // { id: 1, name: "Alice", age: 25 } or null
  .catch(console.error);