How do you get the Ruby on Rails generated id of a form element for reference in JavaScript?

Question

When using the form_for helper and a text_field call, Ruby on Rails will generate a unique id for the element that it outp

Answer 1

Look at the form builder options:

<%= form_for @user do |f| %>
  <% form_css_id = "#" + f.options[:html][:id] %>
<% end %>

Options should at least include the following data: css class, id, http method and authenticity token.