function openIndexedDb() { var openRequest = indexedDB.open('some_db_name', 1); openRequest.onerror = function (e) { console.error('DB OPEN ERROR', e); }; openRequest.onsuccess = function (e) { console.log('DB OPEN OK', e); }; openRequest.onupgradeneeded = function (e) { console.log('DB OPEN UPGRADE', e); e.currentTarget.result.createObjectStore('some_store_name'); }; } openIndexedDb();