Troubleshoot of beforeunload confirm call
javascript, jquery, onbeforeunload
Solution
WHen using onbeforeunload you have to return a string, like so:
window.onbeforeunload = function(e) {
return 'Dialog text here.';
};
source: https://developer.mozilla.org/en-US/docs/Web/API/Window.onbeforeunload
Problem
My Code: ``` //hold window open on form change window.onbeforeunload = function(e) { if(formChanges > 0) { if(formData != initFormData) { if(confirm('here')) { e.preventDefault(); } else { e = null; } } else { e = null; } } else { e = null; } }; ``` The three vars (`formChanges`, `formData`, and `initFormData`) are all being filled correctly, and little tests have shown that they are being read correctly within the function. The problem is that the page unloads nomatter what, and no confirmation dialog ever appears. The console log flashes for a moment before being unloaded (I can't seem to write it's contents to file) and I can see the message `Blocked confirm 'here' during beforeunload`, but it's gone before I can access it. Any help is appreciated!