The request object does not initially contain any information about the result of the operation, but once information becomes available, an event is fired on the request, and the information becomes available through the properties of the IDBRequest instance.
When a request is completed, returns the error (a DOMException), or null if the request succeeded. Throws a "InvalidStateError" DOMException if the request is still pending.
Returns "pending" until a request is complete, then returns "done".
When a request is completed, returns the result, or undefined if the request failed. Throws a "InvalidStateError" DOMException if the request is still pending.
Returns the IDBObjectStore, IDBIndex, or IDBCursor the request was made against, or null if is was an open request.
Returns the IDBTransaction the request was made within. If this as an open request, then it returns an upgrade transaction while it is running, or null otherwise.
Dispatches a synthetic event event to target and returns true if either event's cancelable attribute value is false or its preventDefault() method was not invoked, and false otherwise.
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