All the changes made to the by the transaction are reverted. For this includes changes to the set of object stores and , as well as the change to the version. Any and indexes which were created during the transaction are now considered deleted for the purposes of other algorithms.

If transaction is an , run the steps to abort an upgrade transaction with transaction.

This reverts changes to all , object store handle, and instances associated with transaction.

Set transaction’s state to .

If error is not null, set transaction’s error to error.

1. Set request’s to undefined.

2. Set request’s error to a newly ““ [DOMException](https://heycam.github.io/webidl/#idl-DOMException).

3. Fire an event named at request with its [bubbles](https://dom.spec.whatwg.org/#dom-event-bubbles) and attributes initialized to true.

Queue a task to run these steps:

2. If transaction is an , then:

   1. Let request be the open request associated with transaction.

   2. Set request’s to null.

   3. Set request’s result to undefined.