hugo-theme-hilfe/layouts/shortcodes/button.html

{{ $ref := "" }}
{{ $target := "" }}
{{ $size := default "regular" (.Get "size" | lower) }}

{{ if not (in (slice "regular" "large") $size) }}
  {{ $size = "regular" }}
{{ end }}

{{ with .Get "href" }}
  {{ $ref = . }}
  {{ $target = "_blank" }}
{{ end }}

{{ with .Get "relref" }}
  {{ $ref = relref $ . }}
{{ end }}


<span class="gdoc-button gdoc-button--{{ $size }}{{ with .Get "class" }}{{ . }}{{ end }}">
  <a
    {{ with $ref }}href="{{ . }}"{{ end }}
    {{ with $target }}target="{{ . }}"{{ end }}
    class="gdoc-button__link"
  >
    {{ $.Inner }}
  </a>
</span>