Those rants aside, if you really want to do this, then all you need to do is react on the onunload event of the containing window or frame.
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asp.net 3.5 ajax, ie 7, reminder prompt to save when navigating away or closing browser
What is considered the best way to prompt the user to save their work when navigating away from a page or closing a broswer. Gmail does this so well. Is there a recommended way to do this or are there any articles on the subject? Any 3rd party controls to facilitate this?
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Answers
The application is a web app with a lot of work being done on the page between saves. The customers are asking us to implement this because they lose a lot of work when they forget.
You write "all you need to do is react on the onunload event of the containing window or frame."
If this is where you do it, this is where I need the assistance.
Thanks
look for the onbeforeunload event. now supported in firefox too.
http://www.webreference.co
> The customers are asking us to implement this because they lose a lot of work when they forget.
a very good reason to implement it then!
You could also make it even nicer and save the data using the XHR object (AJAX), like Word saves its data every 5 minutes. Because, whatever you do, it is never possible to recover from a crash. And saving the data often using Javascript and XHR will not bother the user but benefit him.
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by: abelPosted on 2008-07-21 at 09:12:44ID: 22051828
I don't believe there's a "best practice" paper about this. However, be very careful with this type of thing. It is generally considered very annoying when a user has to do something extra when wanting to close the browser (consider having three applications in three tabs and having to react on each one of them, that's a huge annoyance and will likely to keep people away from your site).
However, there are of course a couple of use-cases where you want to react on the user leaving a web page. For instance if the webpage contains a web application with unsaved data. But even then...
One situation where it is badly implemented is the Exchange Server Outlook Online application. It is hardly ever needed that it warns you when closing the window and it always asks the annoying "are you sure to...?".