check if assets is defined

Author: klmcadams

src/ansys_sphinx_theme/theme/ansys_sphinx_theme/layout.html

@@ -7,10 +7,12 @@
   <!-- Include desired assets -->
   <script src="https://code.jquery.com/jquery-3.6.4.min.js"></script>
   {% set assets = page_assets.get(pagename, {}) %}
+  {% if assets is defined and assets|length > 0 %}
   {% if assets.get("needs_datatables") %}
   <link href="https://cdn.datatables.net/v/dt/dt-2.2.0/datatables.min.css" rel="stylesheet">
   <script src="https://cdn.datatables.net/v/dt/dt-2.2.0/datatables.min.js"></script>
   {% endif %}
+  {% endif %}
 
   {% if theme_show_breadcrumbs %}
     <link href="{{ pathto('_static/css/breadcrumbs.css', 1) }}" rel="stylesheet" />
@@ -36,12 +38,14 @@
 
   <!-- Include desired assets -->
   {% set assets = page_assets.get(pagename, {}) %}
+  {% if assets is defined and assets|length > 0 %}
   {% if assets.get("needs_datatables") %}
   <script>
     $(document).ready(function () {
       $("table.datatable").DataTable();
     });
   </script>
   {% endif %}
+  {% endif %}
 
 {%- endblock %}