Warning: The latest specification does not include this interface anymore as the IDBDatabase.setVersion() method has been removed. However, it is still implemented in not up-to-date browsers. See the compatibility table for version details.
The new way to do it is to use the IDBOpenDBRequest interface which has now the onblocked handler and the newly needed onupgradeneeded one.

The IDBVersionChangeRequest interface the IndexedDB API represents a request to change the version of a database. It is used only by the setVersion() method of IDBDatabase.


Inherits from: IDBRequest

Updates the version of the database. Returns immediately and runs a versionchange transaction on the connected database in a separate thread.


Attribute Type Description
onblocked Function The event handler for the blocked event.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 12 -webkit From 4.0 (2.0) to 4.0 (2.0) Not supported Not supported Not supported
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support Not supported 6.0 (6.0) ? Not supported Not supported


Document Tags and Contributors

Contributors to this page: chrisdavidmills, fscholz, teoli, nehasharma, grendel, jswisher
Last updated by: chrisdavidmills,