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Sumário
O evento unload
é disparado quando a janela está descarregando seus conteúdos e recursos. A remoção dos recursos é processada após o evento unload
ocorrer.
Sintaxe
window.onunload = funcRef;
funcRef
é a referência a uma função.
Notas
Using this event handler in your page prevents Firefox 1.5 from caching the page in the in-memory bfcache. See Using Firefox 1.5 caching for details.
Browsers equipped with pop-up window blockers will ignore all window.open()
method calls in onunload
event handler functions.
You can and should handle this event through window.addEventListener()
and the unload
event. More documentation is available there.
Especificações
Specification | Status | Comment |
---|---|---|
WHATWG HTML Living Standard The definition of 'GlobalEventHandlers' in that specification. |
Living Standard | |
HTML5.1 The definition of 'GlobalEventHandlers' in that specification. |
Working Draft | |
HTML5 The definition of 'GlobalEventHandlers' in that specification. |
Recommendation |
Compatibilidade de navegadores
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |