blog_comparisons_view.html.erb

<div class="container">
  <%= form_tag comparisons_compare_sections_path, remote: true do %>
    <div class="row">
      <div class="col-6 pad-a10">
        <%= text_area_tag 'left_section', @sample_text, class: 'form-control', size: '50x25' %>
      </div>
      <div class="col-6 pad-a10">
        <%= text_area_tag 'right_section', @sample_text, class: 'form-control', size: '50x25' %>
      </div>
      <div class="col-12 text-center pad-t10">
        <%= submit_tag 'Compare Contents', class: 'btn btn-large btn-success compare-btn' %>
      </div>
    </div>
  <% end %>
  <div class="row">
    <div class="result text-success">
      Both contents are same!
    </div>
  </div>
</div>