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79 lines
1.8 KiB
Markdown
Executable file
79 lines
1.8 KiB
Markdown
Executable file
---
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title: Heading render hooks
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linkTitle: Headings
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description: Create a heading render hook to override the rendering of Markdown headings to HTML.
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categories: [render hooks]
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keywords: []
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menu:
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docs:
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parent: render-hooks
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weight: 40
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weight: 40
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toc: true
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---
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## Context
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Heading render hook templates receive the following [context]:
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[context]: /getting-started/glossary/#context
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###### Anchor
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(`string`) The `id` attribute of the heading element.
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###### Attributes
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(`map`) The Markdown attributes, available if you configure your site as follows:
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{{< code-toggle file=hugo >}}
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[markup.goldmark.parser.attribute]
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title = true
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{{< /code-toggle >}}
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###### Level
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(`int`) The heading level, 1 through 6.
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###### Page
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(`page`) A reference to the current page.
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###### PageInner
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{{< new-in 0.125.0 >}}
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(`page`) A reference to a page nested via the [`RenderShortcodes`] method. [See details](#pageinner-details).
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[`RenderShortcodes`]: /methods/page/rendershortcodes
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###### PlainText
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(`string`) The heading text as plain text.
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###### Text
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(`string`) The heading text.
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## Examples
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In its default configuration, Hugo renders Markdown headings according to the [CommonMark specification] with the addition of automatic `id` attributes. To create a render hook that does the same thing:
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[CommonMark specification]: https://spec.commonmark.org/current/
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{{< code file=layouts/_default/_markup/render-heading.html copy=true >}}
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<h{{ .Level }} id="{{ .Anchor }}">
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{{- .Text | safeHTML -}}
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</h{{ .Level }}>
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{{< /code >}}
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To add an anchor link to the right of each heading:
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{{< code file=layouts/_default/_markup/render-heading.html copy=true >}}
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<h{{ .Level }} id="{{ .Anchor }}">
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{{ .Text | safeHTML }}
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<a href="#{{ .Anchor }}">#</a>
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</h{{ .Level }}>
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{{< /code >}}
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{{% include "/render-hooks/_common/pageinner.md" %}}
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