How To Get A Countdown Timer To Restart

I am creating an online examination system. I click the Apply button, then the countdown timer starts. Some time later, the browser page closes. After I click the same exam name, t

Solution 1:

It may depends on browser, according to this link

The lifetime of a browsing context can be unrelated to the lifetime of the actual user agent process itself, as the user agent may support resuming sessions after a restart.

You may have to clean session stroage on tab close I think.