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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

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
oncloseChrome Full support YesEdge ? Firefox Full support YesIE ? Opera ? Safari No support NoWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android ? Safari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also

Documentlabels en -medewerkers

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