coffee.coffee

    $('ul.links').on 'ajax:success', '.link', (evt, data, status, xhr) ->
      console.log 'link clicked' 
      console.log $(this)

    $('#this-form').bind 'ajax:success', (evt, data, status, xhr) ->
      console.log 'form submitted'

    # # When .link is clicked
    # link clicked
    # [a.link ...]
    # form submitted

    # # When form submitted
    # form submitted

controller.rb

class TheController < Dashboard::ApplicationController
  ...
  
  def update
    ...
    
    respond_to do |format|
      format.html { redirect_to :back }
      format.json { render json: { success: true } }
    end
  end
  
  def update_all
    ...
    
    respond_to do |format|
      format.html { redirect_to :back }
      format.json { render json: { success: true } }
    end
  end
end

view.html.erb

<%= form_tag update_all_objects_path, id: 'this-form', method: :patch, remote: true, data: {type: :json} %>

  <ul>
    <% @objects.each do |object| %>
      <%= link_to 'Update', object_path(object), class: 'link', method: :patch, remote: true, data: {type: :json} %>
    <% end %>
  </ul>
</form>