On Tue, May 19, 2015 at 8:23 AM, Miloš Milovanović
<mmmilovanovic...@gmail.com> wrote:
> I want to logout a user from application when the application tab is closed.


the browser doesn't notify the server when the tab (or window) is closed.

remember that the original web architecture was simply about
downloading HTML documents and showing to the user.  Once the download
has happened, we're done with the server.

the whole concept of "web application" is javascript running in the
context of a web page, so you need the application itself (not the
browser) to notify the server.  You can use the "on-unload" event; for
example with jQuery's .unload() event hook.  Note that this event
fires every time the page is unloaded, not only when the window or tab
is closed, but also if the user navigates to another page (either via
the URL bar or by clicking any link), uses the 'back' or 'forward'
buttons, or even when reloading.

that's why most web applications rely on timeout and not on trying to
detect the user leaving the application.

-- 
Javier

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