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85 lines
2.4 KiB
Markdown
Executable file
85 lines
2.4 KiB
Markdown
Executable file
---
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title: Introduction
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description: An introduction to Hugo's render hooks.
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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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identifier: render-hooks-introduction
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parent: render-hooks
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weight: 20
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weight: 20
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---
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When rendering Markdown to HTML, render hooks override the conversion. Each render hook is a template, with one template for each supported element type:
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- [Code blocks](/render-hooks/code-blocks)
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- [Headings](/render-hooks/headings)
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- [Images](/render-hooks/images)
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- [Links](/render-hooks/links)
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{{% note %}}
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Hugo supports multiple [content formats] including Markdown, HTML, AsciiDoc, Emacs Org Mode, Pandoc, and reStructuredText.
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The render hook capability is limited to Markdown. You cannot create render hooks for the other content formats.
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[content formats]: /content-management/formats/
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{{% /note %}}
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For example, consider this Markdown:
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```text
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[Hugo](https://gohugo.io)
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```
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Without link or image render hooks, this example above is rendered to:
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```html
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<p><a href="https://gohugo.io">Hugo</a></p>
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<p><img alt="kitten" src="kitten.jpg"></p>
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```
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By creating link and image render hooks, you can alter the conversion from Markdown to HTML. For example:
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```html
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<p><a href="https://gohugo.io" rel="external">Hugo</a></p>
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<p><img alt="kitten" src="kitten.jpg" width="600" height="400"></p>
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```
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Each render hook is a template, with one template for each supported element type:
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```text
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layouts/
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└── _default/
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└── _markup/
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├── render-codeblock.html
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├── render-heading.html
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├── render-image.html
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└── render-link.html
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```
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The template lookup order allows you to create different render hooks for each page [type], [kind], language, and [output format]. For example:
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```text
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layouts/
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├── _default/
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│ └── _markup/
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│ ├── render-link.html
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│ └── render-link.rss.xml
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├── books/
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│ └── _markup/
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│ ├── render-link.html
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│ └── render-link.rss.xml
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└── films/
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└── _markup/
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├── render-link.html
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└── render-link.rss.xml
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```
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[kind]: /getting-started/glossary/#page-kind
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[output format]: /getting-started/glossary/#output-format
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[type]: /getting-started/glossary/#content-type
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The remaining pages in this section describe each type of render hook, including examples and the context received by each template.
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