Any way to identify browser tab in JavaScript?

Question

I need to be able to identify what tab I am in within the browser. Isn\'t there some bit of information I can get from the browser to identify the tab? I don\'t need to kn

Answer 1

SessionStorage is per tab/window, so you can define a random number in sessionStorage and get it at first if exists:

var tabID = sessionStorage.tabID ? sessionStorage.tabID : sessionStorage.tabID = Math.random();

UPDATE:
In some cases, you may have same sessionStorage in multiple tab (e.g. when you duplicate tab). In that case, following code may helps:

var tabID = sessionStorage.tabID && sessionStorage.closedLastTab !== '2' ? sessionStorage.tabID : sessionStorage.tabID = Math.random();
sessionStorage.closedLastTab = '2';
$(window).on('unload beforeunload', function() {
      sessionStorage.closedLastTab = '1';
});