Check if user has logged in on client side

Question

Is there a safe way to check if the user has logged into the application rather than checking if "sid" cookie exists in user's machine ?

I want to allow the user to proceed on certain links on a page only if they have logged in.

I do the login validation on the server side but want to avoid the request trip.

Pure JS or JQuery solution would be appreciated.

Thank you.

Answer 1

Please try this

Put this code after user first log in

jQuery(window).load(function() {
  sessionStorage.setItem('status','loggedIn') 
});

When ever user clicks a link you can check like

if (sessionStorage.getItem('status') != null))
    //redirect to page
}
else{
    //show validation message
}