hugo/docs/content/en/methods/pages/Prev.md

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Prev	Returns the previous page in a local page collection, relative to the given page.			related returnType signatures methods/pages/Next methods/page/Next methods/page/NextInSection methods/page/Prev methods/page/PrevInSection hugolib.pageStates PAGES.Prev PAGE	true

The behavior of the Prev and Next methods on a Pages objects is probably the reverse of what you expect.

With this content structure and the page collection sorted by weight in ascending order:

content/
├── pages/
│   ├── _index.md
│   ├── page-1.md   <-- front matter: weight = 10
│   ├── page-2.md   <-- front matter: weight = 20
│   └── page-3.md   <-- front matter: weight = 30
└── _index.md

When you visit page-2:

• The Prev method points to page-3
• The Next method points to page-1

{{% note %}} Use the opposite label in your navigation links as shown in the example below. {{% /note %}}

{{ $pages := where .Site.RegularPages.ByWeight "Section" "pages" }}

{{ with $pages.Next . }}
  <a href="{{ .RelPermalink }}">Previous</a>
{{ end }}

{{ with $pages.Prev . }}
  <a href="{{ .RelPermalink }}">Next</a>
{{ end }}

Compare to Page methods

{{% include "methods/_common/next-prev-on-page-vs-next-prev-on-pages.md" %}}