The onclose event handler of the IDBDatabase interface handles the close event, which is fired when the database is unexpectedly closed. This can happen, for example, when the application is shut down or access to the disk the database is stored on is lost while the database is open.
The close event is fired after all transactions have been aborted and the connection has been closed.
Note: This feature is available in Web Workers.
Syntax
IDBDatabase.onclose = function(event) { ... };
Value
A function which is called when the close event is fired.
Example
db.onclose = function(event) {
myAppShowAlert('The database "' + db.name + '" has unexpectedly closed.');
};
Specifications
| Specification | Status | Comment |
|---|---|---|
| Indexed Database API Draft The definition of 'onclose' 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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
onclose | Chrome
Full support
31
| Edge Full support ≤18 | Firefox Full support 50 | IE ? | Opera Full support Yes | Safari Full support 10.1 | WebView Android Full support Yes | Chrome Android Full support 31 | Firefox Android Full support 50 | Opera Android Full support Yes | Safari iOS Full support 10.3 | Samsung Internet Android Full support 2.0 |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
- See implementation notes.
- See implementation notes.
See also
- Using IndexedDB
IDBDatabase- close event