Web/API/GlobalEventHandlers/onclose

This is an experimental technologyCheck 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 StandardThe definition of 'onclose' in that specification.	Living Standard

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 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