locomotivecms/engine

 <div id="editor-app"></div>

<% content_for :head do %>
  <script>
    const _json = <%== render partial: 'locomotive/page_content/edit', formats: :json %>;

    window.Locomotive.previewBaseUrl = "<%= preview_path(current_site) %>";

    window.Locomotive.data = _json.data;
    window.Locomotive.urls = _json.urls;

    window.Locomotive.i18n = <%= h I18n.t('locomotive.editor').to_json.html_safe %>;

    window.Locomotive.maximum_uploaded_file_size = <%= current_site.maximum_uploaded_file_size %>;
  </script>

  <%= javascript_include_tag  'locomotive/editor' %>
  <%= stylesheet_link_tag     'locomotive/editor', media: 'screen' %>
<% end %>