js before unload
window.addEventListener('beforeunload', (event) => {
// Cancel the event as stated by the standard.
event.preventDefault();
// Chrome requires returnValue to be set.
event.returnValue = '';
});js before unload
window.addEventListener('beforeunload', (event) => {
// Cancel the event as stated by the standard.
event.preventDefault();
// Chrome requires returnValue to be set.
event.returnValue = '';
});javascript beforeunload
window.addEventListener("beforeunload", function(event) { ... });
window.onbeforeunload = function(event) { ... };Copyright © 2021 Codeinu
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