Question

I don’t know is it possible – to call jQuery when user sign up.

I’m using Rails and Devise gem, so I have after_sign_up_path:

  def after_sign_up_path_for(resource)
    edit_user_registration_path(current_user)
    //call jQuery 
 end

or if this is impossible – why my js is not working :

   if($('.alert').val()=='Welcome! You have signed up successfully.')) 
      $('#congrats').show();

EDIT: HTML

      <div class="alert alert-notice">Welcome! You have signed up successfully.</div>

Answer 1

There is an extra ) in your code:

 if($('.alert').val()=='Welcome! You sign up.')) 
                                //  -----------^

Try this:

if ( $('.alert').val() == 'Welcome! You sign up.' ) {
      $('#congrats').show();
}

for div elements you should use text() instead of val():

if ( $('.alert').text() == 'Welcome! You have signed up successfully.' ) {
      $('#congrats').show();
}