This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The onclose property of the GlobalEventHandlers mixin is an EventHandler for processing close events sent to a <dialog> element.
The close event fires when the user closes a <dialog>.
Note: To handle the closing of a window, use onbeforeunload or onunload.
Syntax
target.onclose = functionRef;
Value
functionRef is a function name or a function expression. The function receives an Event object as its sole argument.
Only one onclose handler can be assigned to an object at a time. You may prefer to use the EventTarget.addEventListener() method instead, since it's more flexible.
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'onclose' in that specification. |
Living Standard |
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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
onclose | Chrome Full support Yes | Edge Full support ≤79 | Firefox Full support Yes | IE ? | Opera ? | Safari No support No | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android ? | Safari iOS No support No | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
See also
closeevent- HTML
<dialog>element - Related event handler:
GlobalEventHandlers.oncancel