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Detecting idle time in JavaScript elegantly

In a web application that I'm developing, on every page of the application, when nothing happens for a set amount of time, the page should automatically change. I think setting window.location will do for the latter part.

However, when it comes to detecting that nothing has happened, I'm a bit stuck. I'd think that binding all keyboard and mouse events to a single handler could do it, but I'm wondering if there is a better way. Has anyone done this before?

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  • @Bartek my bad, I should have searched better. Commented Dec 21, 2012 at 17:12
  • Another related question: stackoverflow.com/questions/1009260/… Commented Dec 21, 2012 at 17:14

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Detecting idle time in JavaScript elegantly seems to miss the blur and focus events on the window. The basic approach is as you suggested but I'd take a close look at which events exactly you're binding on.

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Thanks for you noticing this, but those events are irrelant in my case as the application will never lose focus. Of course, you couldn't know that.
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Aren't running your site on a web server? A web server, such as Tomcat, can check if a session timed out.

In tomcat's web.xml you would add or change a setting:

<session-config> <session-timeout>60</session-timeout> </session-config>

In case of a session timeout, you could redirect to another page.

Here is an example:

https://stackoverflow.com/a/1027592/1916258

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The project is written in Java (Servlets and JSP) and deployed on Tomcat. So suppose we have this session timeout, how can you detect it and take action accordingly? I must warn you though, that I will not prefer this solution because it's server dependant.
I've added an example (link to another question) in my answer.

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