{{ if not (.Page.Scratch.Get "mermaid") }}
    <!-- Include mermaid only first time -->
    <script src="{{ "js/mermaid.min.js" | relURL }}"></script>
    {{ .Page.Scratch.Set "mermaid" true }}
{{ end }}

<p class="mermaid{{ with .Get "class" }} {{ . }}{{ end }}">
    {{ .Inner }}
</p>