Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The IDBVersionChangeEvent() constructor creates a new IDBVersionChangeEvent object, which is used to represent when a version of the database has changed, as a result of the onupgradeneeded event handler.
js
new IDBVersionChangeEvent(type) new IDBVersionChangeEvent(type, options)
type A string with the name of the event. It is case-sensitive and browsers set it to versionchange, success, or blocked.
options Optional
An object that, in addition of the properties defined in Event(), can have the following properties:
oldVersion Optional
A number representing the previous version of the database. It defaults to 0.
newVersion Optional
An unsigned long representing the new version of the database, or null if the database is being deleted. It defaults is null.
A new IDBVersionChangeEvent object.
For a full working example, see our To-do Notifications app (view example live).
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
IDBVersionChangeEvent |
41 | 79 | 25 | No | 28 | 10 | 41 | 41 | 25 | 28 | 10 | 4.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/IDBVersionChangeEvent/IDBVersionChangeEvent