Is there a function in JS that detects only the last tab/browser close? Or is there a ways that when the last tab/browser is closed, logout function will trigger?

I tried the one below but it did not work.

var warnBeforeClose = true;
function unloadPage() {
    if (performance.navigation.type == performance.navigation.TYPE_RELOAD) {
        dontWarn();
    }

    if (warnBeforeClose) {
        $(".logoutButton").click();
        return "Your changes will not be saved.";
    }
}
window.onbeforeunload = unloadPage;

// ...when the elements exist:
$("a").click(dontWarn);
$("button").click(dontWarn);
$("form").submit(dontWarn);
$("input[type=submit]").click(dontWarn);

function dontWarn() {
    // Don't warn
    warnBeforeClose = false;

    // ...but if we're still on the page a second later, set the flag again
    setTimeout(function () {
        warnBeforeClose = true;
    }, 1000);
}