{#- Taken from https://github.com/welpo/tabi/blob/7b00ed1d9dca5c529d2816c5b6679bfe600d63fc/templates/macros/rel_attributes.html -#}

{% macro rel_attributes() %}

{%- set rel_attributes = [] -%}
{%- if config.markdown.external_links_target_blank -%}
	{%- set rel_attributes = rel_attributes | concat(with="noopener") -%}
{%- endif -%}
{%- if config.markdown.external_links_no_follow -%}
	{%- set rel_attributes = rel_attributes | concat(with="nofollow") -%}
{%- endif -%}
{%- if config.markdown.external_links_no_referrer -%}
	{%- set rel_attributes = rel_attributes | concat(with="noreferrer") -%}
{%- endif -%}

{# Return the array of rel attributes joined by a space #}
{{- rel_attributes | join(sep=" ") -}}

{% endmacro rel_attributes %}