async function sampleTest(dbName, storeName) 
{
	let version = 1;
	const db = await openDatabase(dbName, version, (db) => 
	{
		if (!db.objectStoreNames.contains(storeName)) 
		{
			const store = db.createObjectStore(storeName, { keyPath: "f1" });
			store.createIndex("f2", "f2", { unique: false });
			store.createIndex("f3", "f3", { unique: false });
		}
	});
	
	//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 openDatabase(dbName, version, upgrade) 
{
	return new Promise((resolve, reject) => 
	{
		const req = indexedDB.open(dbName, version);
		req.onupgradeneeded = (event) => 
		{
			const db = event.target.result;
			upgrade?.(db, event);
		};
		req.onsuccess = (event) => 
		{
			resolve(event.target.result);
		};
		req.onerror = () => reject(req.error);
	});
}
sampleTest("aaa", "t1");