IDBVersionChangeEvent: oldVersion property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.
Note: This feature is available in Web Workers.
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.
Value
A number containing a 64-bit integer.
Examples
js
const dbName = "sampleDB";
const dbVersion = 2;
const request = indexedDB.open(dbName, dbVersion);
request.onupgradeneeded = (e) => {
const 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 |
---|
Indexed Database API 3.0 # dom-idbversionchangeevent-oldversion |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
oldVersion |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
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.
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 the example live).