JavaScript before leaving the page

Question

I want to make a confirmation before user leaving the page. If he says ok then it would redirect to new page or cancel to leave. I tried to make it with onunload

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Answer 1

Just a bit more helpful, enable and disable

$(window).on('beforeunload.myPluginName', false); // or use function() instead of false
$(window).off('beforeunload.myPluginName');