Deferred scripts loading

macao/layouts/partials/head.html

@@ -7,13 +7,15 @@
 
     {{/* if a quiz.json exists in the page resources, load SurveyJS */}}
     {{ with .Resources.GetMatch "quiz.json" }}
-<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
+        <script defer type="text/javascript"
+                src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
         <link href="https://unpkg.com/survey-jquery/defaultV2.min.css" type="text/css" rel="stylesheet">
-<script type="text/javascript" src="/survey.jquery.min.js"></script>
-<script type="text/javascript" src="https://unpkg.com/survey-core/themes/default-light-panelless.min.js"></script>
+        <script defer type="text/javascript" src="/survey.jquery.min.js"></script>
+        <script defer type="text/javascript"
+                src="https://unpkg.com/survey-core/themes/default-light-panelless.min.js"></script>
 
         {{- $quizjs := resources.Get "quiz.js" -}}
-<script type="text/javascript" src="{{- $quizjs.RelPermalink -}}"> </script>
+        <script defer type="text/javascript" src="{{- $quizjs.RelPermalink -}}"></script>
     {{ end }}
 
 {{ end }}