Javascript / HTML关闭窗口事件

Question

I am trying to do this in html and js but not refresh or reload just trigger when its getting closed. I used functions like onbeforeunload,unload but they didnt work.
sample image

Answer 1

Try This with jQuery:

$(window).bind('beforeunload', function(){
  return 'Are you sure you want to leave?';
});

Or with javascript

window.onbeforeunload = function(){
  return 'Are you sure you want to leave?';
};