Custom window popup

Question

Besides window.alert() , window.confirm() and window.prompt() , is it possible to create custom popup decision?

For example: When you write a comment on facebook and try to close the window, a popup appears and its buttons are Leave and Stay.

Answer 1

Yes, check out bootstrap modals

http://getbootstrap.com/javascript/#modals

There are other css frameworks and libraries that implement modals as well. Essentially these are just divs that have a higher z-index than the rest of the page with some buttons on them. Because of this they are completely customizable.