Question

I am not sure what it means by “unknown” when I use FB.getLoginStatus. shall I redirect to the auth dialog box?
I have the login button plugin on my page

but it works when I log using my own facebook account.
when I open the page without logging in, the button wouldn’t even show up.
Is there a reason for that?

Answer 1

From https://developers.facebook.com/docs/plugins/registration/flow/

response.status   Description
connected         user is logged into Facebook, has authorized your app
notConnected      user is logged into Facebook, has not authorized your app
unknown           user is logged out of Facebook.