All pending IDBRequest objects created during this transaction have their IDBRequest.error attribute set to AbortError.
The XMLHttpRequest.abort() method aborts the request if it has already been sent. When a request is aborted, its readyState is set to 0 (UNSENT), but the readystatechange event is not fired.
The abort() method of the SourceBuffer interface aborts the current segment and resets the segment parser.