cupper-hugo-theme/themes/inclusive-pattern-docs/layouts/shortcodes/principles.html

{{ $JSON := $.Site.Data.principles }}
{{ $included := .Get "include" }}
{{ $included := apply (split $included ", ") "lower" "." }}
{{ $descriptions := .Get "descriptions" }}
<ul class="principles {{ if $descriptions }}with-desc{{ end }}">
  {{ range $JSON.principles }}
    {{ if in $included (lower .title) }}
      <li>
        <strong><a href="https://inclusivedesignprinciples.org#{{ .title | urlize }}">{{ .title }}</a>:</strong> <em>{{ .strapline }}</em>
        {{ if $descriptions }}
          <p>{{ .description }}</p>
        {{ end }}
      </li>
    {{ end }}
  {{ end }}
</ul>