javascript - Best way for checking if a user is logged with node.js and express and change client-side html -

i'm doing web application node.js , express; i'm using sessions mongodb. server side code this:

exports.home = function(req, res){ if(req.session.userenabled){     console.log("logged");     res.render('home', { title: 'my title' , css: '/stylesheets/home.css',authenticated:'true'}); } else{     console.log("not logged");     res.render('home', { title: 'my title' , css: '/stylesheets/home.css',  authenticated:'false'}); } 

};

into front end check value 'authenticated' showing different html:

script.             if(#{authenticated})                 document.write("<div id='profile' class='myclass' ><p>show profile<p></div>");             else                 document.write("<div id='register' class='myclass' ><p>register<p>"); 

it works, question is: way giving dinamism front end pages?

i tried create function client side checking if authenticated:

function checkiflogged(){ $.get( '/checkiflogged' , function(data) {     alert('result checkiflogged: '+data);     return(data);      }); 

}

calling html:

script.     var authenticated=checkiflogged(); ... ... ... script.         if(authenticated)             document.write("<div id='profile' class='myclass' ><p>show profile<p></div>");         else             document.write("<div id='register' class='myclass' ><p>register<p>"); 

but asinchronous result returns after page loaded 'false' value of var authenticated.

in way thought avoid check , pass value server side every res.render, doesn't work. first solution right way or second way near find better way doing that?

you may try this:

function checkiflogged(callback){     $.get( '/checkiflogged' , function(data) {         alert('result checkiflogged: '+data);         callback(data);     }); } 

and

script.     checkiflogged(function(authenticated) {         if(authenticated)              //i wouldn't use document.write here it's bit dangerous asynchronous call              document.write("<div id='profile' class='myclass' ><p>show profile<p></div>");         else             document.write("<div id='register' class='myclass' ><p>register<p>");     });