Web/API/IDBDatabase/onclose

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 DraftThe definition of 'onclose' in that specification.	Recommendation

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`onclose`	Chrome Full support 31 Notes' Full support 31 Notes' Notes' approx	Edge Full support ≤18	Firefox Full support 50	IE No support No	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
No support: No support
See implementation notes.': See implementation notes.