app/views/layouts/application.html.erb

<!DOCTYPE html>
<html>
  <head>
    <title>SampleGlimmerDslOpalRails7App</title>
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <%= csrf_meta_tags %>
    <%= csp_meta_tag %>

    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github.min.css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
    <!-- and it's easy to individually load additional languages -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/languages/ruby.min.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/highlightjs-line-numbers.js/2.8.0/highlightjs-line-numbers.min.js"></script>
    <%= stylesheet_link_tag "application", "data-turbo-track": "reload" %>
    <%#= stylesheet_link_tag    'glimmer/glimmer', media: 'all', 'data-turbolinks-track': 'reload' %>
    <%= javascript_importmap_tags %>
    <%#= javascript_include_tag "opal_application", "data-turbolinks-track": "reload" %>
  </head>

  <body>
    <%= yield %>
  </body>
</html>