问题描述
在mobile-safari中是否有替代onbeforeunload的替代方法？我注意到Google能够在mobile-safari中捕获 onbeforeunload 事件。有没有人想出他们是如何做到的？
Is there an alternative method to use instead of onbeforeunload in mobile-safari? I've noticed that Google was able to capture the onbeforeunload event in mobile-safari. Has anyone figured out how they are doing so?
谷歌能够使用他们的Gmail客户端这样做。创建新消息...在文本区域中键入内容...点击浏览器后退按钮。它弹出一条警告信息。我使用iPad进行测试。
Google was able to do so using their gmail client. Create a new message... type something in the text area... hit the browser back button. It pops up a warning message. I used an iPad to do my test.
推荐答案
我猜他们正在使用History API。通过收听popstate
I would guess that they are using the History API. By listening to popstate
window.addEventListener("popstate", function(e) { ... });
你可以在允许做任何愚蠢行为之前显示警告。
you can show a warning before allowing doing anything stupid.
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