Create a toggle button with Hotwire and Rails

If you have a one-off toggle interaction, it's easy to wire up with Turbo, Hotwire, and Rails.

In your controller, you have a typical Rails action.

def show
  @user = User.find(params[:id])
end

In your view, place a standard rails button_to inside a turbo_frame_tag and set the method:

<%= turbo_frame_tag "friend" do %>
  <%= button_to user_path(@user), method: :put do %>
    <span class="font-bold <%= @user.is_friend? ? 'text-green-500' : 'text-gray-900' %>">Friend</span>
  <% end %>
<% end %>

And in your controller, toggle your friend code and simply rerender that same view:

def update
  # Write some code here to toggle the friend status
  # ...
  # Rerender the same view
  render 'button'
end