This tests some obvious failures that can happen while calling transaction.objectStore() On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". indexedDB = self.indexedDB || self.webkitIndexedDB || self.mozIndexedDB || self.msIndexedDB || self.OIndexedDB; indexedDB.deleteDatabase(dbname) indexedDB.open(dbname) Upgrade needed: Old version - 0 New version - 1 [object IDBTransaction] - versionchange [object IDBDatabase] Caught attempt to access empty-named object store on the transaction Caught attempt to access null-named object store on the transaction Caught attempt to access non-existant object store on the transaction Caught attempt to access valid object store on a transaction that is already finishing put failed (because transaction was aborted) First version change transaction unexpected error - [object Event] PASS successfullyParsed is true TEST COMPLETE