The oldVersion
read-only property of the IDBVersionChangeEvent
interface returns the old version number of the database.
When the opened database doesn't exist yet, the value of oldVersion
is 0.
Note: This feature is available in Web Workers.
Syntax
var oldVersion = IDBVersionChangeEvent.oldVersion
Value
Example
var dbName = "sampleDB"; var dbVersion = 2; var request = indexedDB.open(dbName, dbVersion); request.onupgradeneeded = function(e) { var db = request.result; if (e.oldVersion < 1) { db.createObjectStore("store1"); } if (e.oldVersion < 2) { db.deleteObjectStore("store1"); db.createObjectStore("store2"); } // etc. for version < 3, 4... };
Specifications
Specification | Status | Comment |
---|---|---|
Indexed Database API 2.0 The definition of 'oldVersion' in that specification. |
Recommendation | |
Indexed Database API Draft The definition of 'oldVersion' in that specification. |
Recommendation |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
oldVersion | Chrome
Full support
24
| Edge Full support 12 | Firefox
Full support
16
| IE Partial support 10 | Opera Full support 15 | Safari Full support 7 | WebView Android
Full support
Yes
| Chrome Android
Full support
25
| Firefox Android Full support 22 | Opera Android Full support 14 | Safari iOS Full support 8 | Samsung Internet Android
Full support
1.5
|
Legend
- Full support
- Full support
- Partial support
- Partial support
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.
See also
- Using IndexedDB
- Starting transactions:
IDBDatabase
- Using transactions:
IDBTransaction
- Setting a range of keys:
IDBKeyRange
- Retrieving and making changes to your data:
IDBObjectStore
- Using cursors:
IDBCursor
- Reference example: To-do Notifications (view example live.)