async function sampleTest(dbName, storeName) 
{
	const db = await databaseOpen(dbName);
	//update
	await runTx(db, storeName, "readwrite", (store) => 
	{
		for (let i = 0; i < 3; i++) 
		{
			const getReq = store.get(i);
			getReq.onsuccess = () => 
			{
				const original = getReq.result;
				if (original) {
					original.f3 = "change" + (i + 1);
					store.put(original);
				}
			};
		}
	});
	//select all
	const rows = await runTx(db, storeName, "readonly", (store) => 
	{
		return new Promise((resolve, reject) => 
		{
			const req = store.getAll();
			req.onsuccess = () => resolve(req.result);
			req.onerror = () => reject(req.error);
		});
	});
	
	rows.forEach(r => console.log(`f1:${r.f1}, f2:${r.f2}, f3:${r.f3}`));
	db.close();
}
function waitForTx(tx) 
{
	return new Promise((resolve, reject) => 
	{
		tx.oncomplete = () => resolve();
		tx.onabort = () => reject(tx.error ?? new Error("Transaction aborted"));
		tx.onerror = () => reject(tx.error);
	});
}

async function runTx(db, storeName, mode, work) 
{
	const tx = db.transaction([storeName], mode);
	const store = tx.objectStore(storeName);
	const result = await work(store);
	await waitForTx(tx);
	return result;
}
function databaseOpen(dbName) 
{
	return new Promise((resolve, reject) => 
	{
		const req = indexedDB.open(dbName);
		req.onsuccess = (event) => 
		{
			resolve(event.target.result);
		};
		req.onerror = () => reject(req.error);
	});
}
sampleTest("aaa", "t1");