当用户尝试刷新/关闭/导航到另一个网页时显示确认对话框 [英] Displaying a confirm dialog box when the user tries to refresh/close/navigate to another web page

问题描述

当我试图刷新页面，导航到另一个页面，关闭页面时，我想用一个确认对话框警告用户。

I would like to warn the user with a confirm dialog box when he tries to refresh the page, navigate to another page, close the page.

就像Gmail一样做;例如，当你写一些东西然后尝试关闭页面而不发送你的消息时，会出现一个警告对话框，有两个选项：
离开此页/留在这个页面

Just like Gmail does; for example when you write something then try to close the page without sending your message, a warning dialog box will appear with two options: Leave this page/Stay on this page

推荐答案

使用onbeforeunload。来自 https://developer.mozilla.org/en/DOM/window.onbeforeunload：

Use onbeforeunload. From https://developer.mozilla.org/en/DOM/window.onbeforeunload:

window.onbeforeunload = function (e) {
  e = e || window.event;

  // For IE and Firefox prior to version 4
  if (e) {
    e.returnValue = 'Your text';
  }

  // For others
  return 'Your text';
};

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