This characteristic may not exist in all browsers.

It makes use of the fact that a duplicated tab has no name. The code below forces a signon page to appear in the duplicated tab if they duplicate a signed on session. The issue was that the browser duplicate tab facility messed up the enforcement. The signon uses localStorage flags to enforce this requirement and uses the window.name to know which user owns the tab. My application required that a user can only sign on once so I can use the localStorage to reliably cache records. $('#myStateInput').val('') // Blank the state out. $(window).on('beforeunload', function() // Back or Forward buttons This works because onbeforeunload gets only called when the user clicks 'Back' or 'Forward' but not when duplicating a tab. To do this we can blank out the state in onbeforeunload.

Thats great and all, but you only want to detect when you 'Duplicate tab'. $('#myStateInput').val('already loaded') // Set stateĪlert('Loaded with state. If ($('#myStateInput').val() = '') // Load with no state. The 'Duplicate tab' action works almost exactly like when reloading a page after the user has clicked 'Back' then 'Forward', so you are basically implementing a version of this question: function onLoad()

Just to clarify: The goal is to is to detect (and close) a tab that has been opened via Chrome's 'Duplicate' right-click menu option.

How to duplicate tab in chrome