On window close run Bootstrap Popup

[Shahjehan]

Hi I wanna call this function before window close

bootstrap pop

[Ilan Firsov]

You can’t really do this, but you can show a message to alert the user he has unsaved changes.
Add a listener for the beforeUnload event and return a string value for a message (will not show on all browsers), when the user saves the changes remove the listener – you can’t just return null or false value, you must remove the listener

A quick demo:
http://codepen.io/ilanfir/pen/Jjlky

[Author]

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