{{ $ref := "" }} {{ $target := "" }} {{ with .Get "href" }} {{ $ref = . }} {{ $target = "_blank" }} {{ end }} {{ with .Get "relref" }} {{ $ref = relref $ . }} {{ end }} <a {{ with $ref }} href="{{.}}" {{ end }} {{ with $target }} target="{{.}}" rel="noopener" {{ end }} class="book-btn{{ with .Get "class" }} {{ . }}{{ end }}"> {{ .Inner | .Page.RenderString }} </a>