hugo/docs/content/en/methods/page/NextInSection.md

title	description	categories	keywords	action
NextInSection	Returns the next page within a section, relative to the given page.			related returnType signatures methods/page/PrevInSection methods/page/Next methods/page/Prev methods/pages/Next methods/pages/Prev hugolib.pageState PAGE.NextInSection

The behavior of the PrevInSection and NextInSection methods on a Page object is probably the reverse of what you expect.

With this content structure:

content/
├── books/
│   ├── _index.md
│   ├── book-1.md
│   ├── book-2.md
│   └── book-3.md
├── films/
│   ├── _index.md
│   ├── film-1.md
│   ├── film-2.md
│   └── film-3.md
└── _index.md

When you visit book-2:

• The PrevInSection method points to book-3
• The NextInSection method points to book-1

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

{{ with .NextInSection }}
  <a href="{{ .RelPermalink }}">Previous in section</a>
{{ end }}

{{ with .PrevInSection }}
  <a href="{{ .RelPermalink }}">Next in section</a>
{{ end }}

{{% note %}} The navigation sort order may be different than the page collection sort order. {{% /note %}}

With the PrevInSection and NextInSection methods, the navigation sort order is fixed, using Hugo’s default sort order. In order of precedence:

1. Page weight
2. Page date (descending)
3. Page linkTitle, falling back to page title
4. Page file path if the page is backed by a file

For example, with a page collection sorted by title, the navigation sort order will use Hugo’s default sort order. This is probably not what you want or expect. For this reason, the Next and Prev methods on a Pages object are generally a better choice.