<%= form_with url: chats_path, html: { id: "chat_form", class: "mt-3" } do |f| %>
  <div class="row">
    <div class="col-11">
      <%= f.text_area :message, class: "form-control w-100", placeholder: "Your message", autofocus: true %>
    </div>
    <div class="col-1">
      <%= f.submit "Send", class: "btn btn-primary w-100" %>
    </div>
  </div>
<% end %>