The code layout.
{% func Code(lang, data string) %}
  {%= layout(code_css(), code_scripts(lang), "", code_contents(lang, data), code_bodyscripts(lang)) %}
{% endfunc %}

{% code
  const prefix = "https://unpkg.com/prismjs"
%}

The code scripts.
{% func code_scripts(lang string) %}
  <link rel='stylesheet' crossorigin='anonymous' href='{%s prefix %}/themes/prism.css' />
{% endfunc %}

The code bodyscripts.
{% func code_bodyscripts(lang string) %}
  {% stripspace %}
    <script src='{%s prefix %}/prism.js'></script>
    {% if lang != "" && lang != "none" %}
      <script src='{%s prefix %}/components/prism-{%s lang %}.js'></script>
    {% endif %}
  {% endstripspace %}
{% endfunc %}

The code css.
{% func code_css() %}
  <style>
  pre[class*="language-"] code[class*="language-"] {
    white-space: pre-wrap;
  }
  </style>
{% endfunc %}

The code contents.
{% func code_contents(lang, data string) %}
  <pre><code class='language-{%s lang %}'>{%s data %}</code></pre>
{% endfunc %}