BeforeUnloadEvent
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Want more browser support for this feature? Tell us why.
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| Bubbles | No |
| Cancelable | Yes |
| Target objects | defaultView |
| Interface | Event |
示ä¾
js
window.addEventListener("beforeunload", function (event) {
event.returnValue = "\\o/";
});
//çåäº
window.addEventListener("beforeunload", function (event) {
event.preventDefault();
});
åºäº Webkit çæµè§å¨æ²¡æéµå¾ªè¯¥å¼¹çªè§èã以ä¸æ¯ä¸ä¸ªåºæ¬è·¨æµè§å¨è¿è¡çä¾åã
js
window.addEventListener("beforeunload", function (e) {
var confirmationMessage = "\\o/";
(e || window.event).returnValue = confirmationMessage; //Gecko + IE
return confirmationMessage; //Webkit, Safari, Chrome etc.
});