Is there any way to detect if user pressed “Stay on page” or “Leave page” in beforeunload event?

问题

Is there any way that I could detect in the following code that either user clicked "leave page" or "stay on page" button ?

$(window).on('beforeunload', function (){
    return "You save some unsaved data, Do you want to leave?";
});

回答1:

With a few hacks you can at least determine if the user stayed.
If the user left the page, there's not much you can do about that :

var timeout;

$(window).on('beforeunload', function (){
    timeout = setTimeout(function() {
        // user stayed, do stuff here
    }, 1000);
    return "You save some unsaved data, Do you want to leave?";
});

FIDDLE

回答2:

iirc, the unload event is not triggered, when the user decides to stay on the page. so:

$(window).on('unload', function (){
    // user has left the page, do stuff here
}

来源：https://stackoverflow.com/questions/17759703/is-there-any-way-to-detect-if-user-pressed-stay-on-page-or-leave-page-in-bef