Add class for css in ejs by node

Please mind the environment of this Application. I'm using

  1. Windows
  2. NPM ,Express
  3. MySQL

This is the code in ejs template. example.ejs

<% if (message) { %>
                <p class="alert " id="errorMessage">
                    <%= message %>
                </p>
            <% } %>

I want to add class to p.

This is what I am doing but didn't work.

messages = "Password Successfully Changed";
jQuery('#errorMessage').addClass('successMessage');
res.render('profile',{page_title:"My Profile",data:rows,message: messages});

I got the answer.

var messageData = {
  message : "Password Successfully Changed",
  class : "successMessage"
};
res.render('profile',{page_title:"My Profile",data:rows,message: messageData });

then on template side.

<% if (globalMessage) { %>
    <p class="alert <%= globalMessage.class %>" id="errorMessage">
       <%= globalMessage.message %>
    </p>
<% } %>