javascript beforeunload

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showing results for - "javascript beforeunload"
Fabiana
05 Jan 2020
1window.addEventListener('beforeunload', (event) => {
2  // Cancel the event as stated by the standard.
3  event.preventDefault();
4  // Chrome requires returnValue to be set.
5  event.returnValue = '';
6});
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Oscar
30 May 2016
1window.addEventListener("beforeunload", function(event) { ... });
2window.onbeforeunload = function(event) { ... };
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