{{ $params := . }}

{{ $fullscreen := $params.fullscreen }}
{{ $referrerpolicy := $params.referrerpolicy | default "no-referrer" }}
{{ $src := $params.src }}
{{ $title := $params.title }}

<iframe {{ if $fullscreen }} allowfullscreen {{ end }} {{ with $referrerpolicy }} referrerpolicy="{{ . }}" {{ end }} {{ with $src }} src="{{ . | safeURL }}" {{ end }} {{ with $title }} title="{{ . }}" {{ end }}></iframe>