{%- comment -%} This prev/next template is used when an author uses: navigation: prev: /path/to/resource/ next: /path/to/resource/ {%- endcomment -%} {%- if page.lang -%}{%- assign lang = page.lang -%}{%- else -%}{%- assign lang = "en" -%}{%- endif -%} {%- if page.navigation -%} {%- assign prev=site.documents | where:"ref", page.navigation.previous | where: "lang", lang | first -%} {%- unless prev.url -%} {%- assign prev=site.pages | where:"ref", page.navigation.previous | where: "lang", lang | first -%} {% endunless %} {%- assign next=site.documents | where:"ref", page.navigation.next | where: "lang", lang | first -%} {%- unless next.url -%} {%- assign next=site.pages | where:"ref", page.navigation.next | where: "lang", lang | first -%} {% endunless %} {%- endif -%}