Possible to detect if a user has multiple tabs of your site open?

Question

I\'m just thinking about the whole site registration process.

A user goes to your site, signs up, and then you tell him you\'ve sent him an email and he needs to ve

Answer 1

To add to other answers: You can also use localStorage. Have an entry like 'openedTabs'. When your page is opened, increase this number. When user leaves the page, decrease it.