如何检查用户是否已登录javascript

Question

I have a signin lightbox that needs to be shown when user is not logged in. The lightbox is completely implemented in javascript, fancybox and uses rails partials for html.

I can see the cookie is set in chrome when logged in, but document.cookie seems to return empty. The reason probably has been explained here

How do I achieve this in javascript / erb.

Answer 1

Handle this in the backend. If you're doing this with rails, be sure to use and abuse current_user , because it will be your best friend.

Then in your partial, you're free to have something like this

<% if current_user %>
     <p>Welcome <%= current_user.username %>!</p>
<% else %>
     <p>Please <%= link_to 'sign in', login_path %></p>
<% end %>

Rails Sessions, Ruby on Rails Tutorial

Answer 2

和Jordan Scales说的相同，但是让它变得更简单...... 如果@ current_user.nil干嘛？