window.onbeforeunload处理ok并取消选项 [英] window.onbeforeunload handling ok and cancel options

问题描述

我有一个window.onbeforeunload函数，它会生成默认消息你确定要离开此页面......。
如果我们点击确定，我们会被重定向到新的链接，如果我们按取消，我们会被重定向回同一页面。

I have a window.onbeforeunload function which generates the default message "Are you sure you want to navigate away from this page...." . If we click on "OK" we are redirected to a new link and if we press "cancel" we are redirected back to the same page.

I当我们按确定并离开页面时，想要从页面保存一些数据。我们如何知道是否按下确定或取消，然后进行事件调用并继续使用确定/取消选项。

I want to save some data from the page when we press "ok" and move away from the page. How can we know if "ok" or "cancel" has been pressed , then make an event call and continue with the "ok"/"cancel" option.

推荐答案

一种可能的方法可能是挂钩 onunload 事件，如果调用该处理程序，你知道用户选择确定。

A possible approach might be to hook into the onunload event as well, and if that handler is called, you know that the user chose OK.

在 onbeforeunload 中，设置一个超时回调在一段时间后调用（例如1秒），如果调用它，则用户可能已选择取消。

In onbeforeunload, set a timeout callback that is called some time afterwards (e.g. 1 second), and if it is called, the user might have selected Cancel.

不确定这对于竞争条件有多安全。

Not sure how safe this is regarding race conditions though.

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