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132 lines
4.2 KiB
Markdown
132 lines
4.2 KiB
Markdown
---
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title: Menu templates
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description: Use menu variables and methods in your templates to render a menu.
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categories: [templates]
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keywords: [lists,sections,menus]
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menu:
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docs:
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parent: templates
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weight: 140
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toc: true
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weight: 140
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aliases: [/templates/menus/]
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---
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## Overview
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After [defining menu entries], use [menu variables and methods] to render a menu.
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Three factors determine how to render a menu:
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1. The method used to define the menu entries: [automatic], [in front matter], or [in site configuration]
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1. The menu structure: flat or nested
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1. The method used to [localize the menu entries]: site configuration or translation tables
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The example below handles every combination.
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## Example
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This partial template recursively "walks" a menu structure, rendering a localized, accessible nested list.
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{{< code file="layouts/partials/menu.html" >}}
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{{- $page := .page }}
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{{- $menuID := .menuID }}
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{{- with index site.Menus $menuID }}
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<nav>
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<ul>
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{{- partial "inline/menu/walk.html" (dict "page" $page "menuEntries" .) }}
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</ul>
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</nav>
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{{- end }}
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{{- define "partials/inline/menu/walk.html" }}
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{{- $page := .page }}
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{{- range .menuEntries }}
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{{- $attrs := dict "href" .URL }}
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{{- if $page.IsMenuCurrent .Menu . }}
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{{- $attrs = merge $attrs (dict "class" "active" "aria-current" "page") }}
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{{- else if $page.HasMenuCurrent .Menu .}}
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{{- $attrs = merge $attrs (dict "class" "ancestor" "aria-current" "true") }}
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{{- end }}
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{{- $name := .Name }}
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{{- with .Identifier }}
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{{- with T . }}
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{{- $name = . }}
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{{- end }}
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{{- end }}
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<li>
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<a
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{{- range $k, $v := $attrs }}
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{{- with $v }}
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{{- printf " %s=%q" $k $v | safeHTMLAttr }}
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{{- end }}
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{{- end -}}
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>{{ $name }}</a>
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{{- with .Children }}
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<ul>
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{{- partial "inline/menu/walk.html" (dict "page" $page "menuEntries" .) }}
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</ul>
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{{- end }}
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</li>
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{{- end }}
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{{- end }}
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{{< /code >}}
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Call the partial above, passing a menu ID and the current page in context.
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{{< code file="layouts/_default/single.html" >}}
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{{ partial "menu.html" (dict "menuID" "main" "page" .) }}
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{{ partial "menu.html" (dict "menuID" "footer" "page" .) }}
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{{< /code >}}
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## Page references
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Regardless of how you [define menu entries], an entry associated with a page has access to page variables and methods.
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This simplistic example renders a page parameter named `version` next to each entry's `name`. Code defensively using `with` or `if` to handle entries where (a) the entry points to an external resource, or (b) the `version` parameter is not defined.
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{{< code file="layouts/_default/single.html" >}}
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{{- range site.Menus.main }}
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<a href="{{ .URL }}">
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{{ .Name }}
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{{- with .Page }}
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{{- with .Params.version -}}
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({{ . }})
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{{- end }}
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{{- end }}
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</a>
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{{- end }}
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{{< /code >}}
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## Menu entry parameters
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When you define menu entries [in site configuration] or [in front matter], you can include a `params` key as shown in these examples:
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- [Menu entry defined in site configuration]
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- [Menu entry defined in front matter]
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This simplistic example renders a `class` attribute for each anchor element. Code defensively using `with` or `if` to handle entries where `params.class` is not defined.
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{{< code file="layouts/partials/menu.html" >}}
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{{- range site.Menus.main }}
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<a {{ with .Params.class -}} class="{{ . }}" {{ end -}} href="{{ .URL }}">
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{{ .Name }}
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</a>
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{{- end }}
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{{< /code >}}
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## Localize
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Hugo provides two methods to localize your menu entries. See [multilingual].
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[automatic]: /content-management/menus/#define-automatically
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[define menu entries]: /content-management/menus/
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[defining menu entries]: /content-management/menus/
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[in front matter]: /content-management/menus/#define-in-front-matter
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[in site configuration]: /content-management/menus/#define-in-site-configuration
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[localize the menu entries]: /content-management/multilingual/#menus
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[menu entry defined in front matter]: /content-management/menus/#example-front-matter
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[menu entry defined in site configuration]: /content-management/menus/#example-site-configuration
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[menu variables and methods]: /variables/menus/
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[multilingual]: /content-management/multilingual/#menus
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