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
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
A number containing a 64-bit integer.
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… };
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
oldVersion |
23 | 12 | 10 | 10 | 15 | 8 | 4.4 | 25 | 22 | 14 | 8 | 1.5 |
IDBDatabase
IDBTransaction
IDBKeyRange
IDBObjectStore
IDBCursor
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https://developer.mozilla.org/en-US/docs/Web/API/IDBVersionChangeEvent/oldVersion