防止使用JavaScript导航网页 [英] Prevent a webpage from navigating away using JavaScript

问题描述

如何防止网页使用JavaScript导航？

How to prevent a webpage from navigating away using JavaScript?

推荐答案

使用 onunload 只允许您显示消息，但不会中断导航（因为为时已晚）。但是，您可以使用 onbeforeunload 并且它将中断导航：

Using onunload only allows you to display messages, but it will not interrupt the navigation (because it is too late). However, you can use onbeforeunload and it will interrupt navigation:

window.onbeforeunload = function() {
  return "Are you sure you want to navigate away?";
}

修改：已移除在return语句中确认（）因为这导致了预期的确认窗口，但也显示第二次确认与第一次确认的结果。

Edit: Removed confirm() in return statement as this caused a confirm window as expected, but also showed a second confirm with the result of the first confirm.

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