The versionchange
event is fired when a database structure change (IDBOpenDBRequest.onupgradeneeded
event or IDBFactory.deleteDatabase
) was requested.
Bubbles | No |
---|---|
Cancelable | No |
Interface | Event |
Event handler property | onversionchange |
Examples
This example opens a database and, on success, adds a listener to versionchange
:
// Open the database const dBOpenRequest = window.indexedDB.open('Nonexistent', 4); dBOpenRequest.onupgradeneeded = event => { const db = event.target.result; // Create an objectStore for this database const objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' }); // define what data items the objectStore will contain objectStore.createIndex('hours', 'hours', { unique: false }); objectStore.createIndex('minutes', 'minutes', { unique: false }); objectStore.createIndex('day', 'day', { unique: false }); objectStore.createIndex('month', 'month', { unique: false }); objectStore.createIndex('year', 'year', { unique: false }); }; dBOpenRequest.addEventListener('success', event => { const db = event.target.result; db.addEventListener('versionchange', event => { console.log('The version of this database has changed'); }); });
The same example, using the onversionchange
event handler property:
// Open the database const dBOpenRequest = window.indexedDB.open('Nonexistent', 4); dBOpenRequest.onupgradeneeded = event => { const db = event.target.result; // Create an objectStore for this database const objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' }); // define what data items the objectStore will contain objectStore.createIndex('hours', 'hours', { unique: false }); objectStore.createIndex('minutes', 'minutes', { unique: false }); objectStore.createIndex('day', 'day', { unique: false }); objectStore.createIndex('month', 'month', { unique: false }); objectStore.createIndex('year', 'year', { unique: false }); }; dBOpenRequest.onsuccess = event => { const db = event.target.result; db.onversionchange = event => { console.log('The version of this database has changed'); }; };
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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
versionchange event | 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
onversionchange
event handler property