This test creates two object stores. It then opens two long running read-only transactions, one per object store. It then opens a read-write transaction to both object stores. The read-only transactions both need to finish before the read-write transaction starts. 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 versionchange transaction completed Success opening database connection - Starting transactions Starting write transaction Read transaction complete - [object Event] Read transaction complete - [object Event] Write to OS1 successful Write to OS2 successful PASS successfullyParsed is true TEST COMPLETE