<% content_for :title do %>
  Hello World!
<% end %>
<% content_for :javascript do %>
  <%= javascript_include_tag 'application' %>
<% end %>
<% content_for :main do %>
  <h1>Hello World</h1>
  <%= react_component("HelloWorldApp", props: @hello_world_props, prerender: false) %>
<% end %>