Merge commit '35dec7c96f7ee3eb17dd444f7067f0c776fb56ae'

docs/content/en/methods/site/MainSections.md

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+---
+title: MainSections
+description: Returns a slice of the main section names as defined in the site configuration, falling back to the top level section with the most pages.
+categories: []
+keywords: []
+action:
+  related: []
+  returnType: '[]string'
+  signatures: [SITE.MainSections]
+---
+
+Site configuration:
+
+{{< code-toggle file=hugo >}}
+[params]
+mainSections = ['books','films']
+{{< /code-toggle >}}
+
+Template:
+
+```go-html-template
+{{ .Site.MainSections }} → [books films]
+```
+
+If `params.mainSections` is not defined in the site configuration, this method returns a slice with one element---the top level section with the most pages.
+
+With this content structure, the "films" section has the most pages:
+
+```text
+content/
+├── books/
+│   ├── book-1.md
+│   └── book-2.md
+├── films/
+│   ├── film-1.md
+│   ├── film-2.md
+│   └── film-3.md
+└── _index.md
+```
+
+Template:
+
+```go-html-template
+{{ .Site.MainSections }} → [films]
+```
+
+When creating a theme, instead of hardcoding section names when listing the most relevant pages on the front page, instruct site authors to set `params.mainSections` in their site configuration.
+
+Then your home page template can do something like this:
+
+```go-html-template
+{{ range where .Site.RegularPages "Section" "in" .Site.MainSections }}
+  <h2><a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a></h2>
+{{ end }}
+```