javascript确认对话框，然后关闭浏览器窗口 [英] javascript confirm dialog box before close browser window

问题描述

在使用javascript或PHP关闭浏览器窗口之前，我需要显示一个确认对话框.当我单击浏览器的关闭按钮时，将出现确认框；否则，不应显示该对话框.

I need to display a confirm dialog box before closing the browser window using javascript or PHP. The confirm box should come up when I click the close button of browser; otherwise, the dialog should not be displayed.

谢谢

推荐答案

这将在关闭浏览器时显示:

This will display it when closing the browser:

window.onbeforeunload = function (event) {
  var message = 'Sure you want to leave?';
  if (typeof event == 'undefined') {
    event = window.event;
  }
  if (event) {
    event.returnValue = message;
  }
  return message;
}

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