how to know if someone is logged via javascript?

Question

in php i would do

if (isset($_COOKIE[\'user\']) && $_COOKIE[\'user\'] == $valueFromDb)
 echo \'logged\';

But in javascript how can

Answer 1

You are mixing up server-side processing (php) with client side processing (javascript). On the client side this information does not exist unless the server has provided it in some framework-specific way.