IDBTransaction: метод commit()

commit()

const note = document.getElementById("notifications");

// open a read/write db transaction, ready for adding the data
const transaction = db.transaction(["myDB"], "readwrite");

// report on the success of opening the transaction
transaction.oncomplete = (event) => {
  note.appendChild(document.createElement("li")).textContent =
    "Transaction completed: database modification finished.";
};

transaction.onerror = (event) => {
  note.appendChild(document.createElement("li")).textContent =
    "Transaction not opened due to error. Duplicate items not allowed.";
};

// create an object store on the transaction
const objectStore = transaction.objectStore("myObjStore");

// add our newItem object to the object store
const objectStoreRequest = objectStore.add(newItem[0]);

objectStoreRequest.onsuccess = (event) => {
  // report the success of the request (this does not mean the item
  // has been stored successfully in the DB - for that you need transaction.onsuccess)
  note.appendChild(document.createElement("li")).textContent =
    "Request successful.";
};

// Force the changes to be committed to the database asap
transaction.commit();