ar.falsy.cat/layouts/partials/mermaid.html

{{if $.Site.Data.config.enableMermaid}}
  {{ if .Page.Store.Get "hasMermaid" }}
    <script type="module">
      import mermaid from 'https://unpkg.com/mermaid@9/dist/mermaid.esm.min.mjs';
      mermaid.initialize({ startOnLoad: true });
    </script>
  {{ end }}
{{ end }}