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Clean up shortcode documentation
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---
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title: Shortcodes
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description: Shortcodes are simple snippets inside your content files calling built-in or custom templates.
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description: Use embedded, custom, or inline shortcodes to insert elements such as videos, images, and social media embeds into your content.
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categories: [content management]
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keywords: [markdown,content,shortcodes]
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keywords: []
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menu:
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docs:
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parent: content-management
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weight: 100
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weight: 100
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toc: true
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aliases: [/extras/shortcodes/]
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testparam: "Hugo Rocks!"
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toc: true
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---
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## What a shortcode is
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## Introduction
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Hugo loves Markdown because of its simple content format, but there are times when Markdown falls short. Often, content authors are forced to add raw HTML (e.g., video `<iframe>`'s) to Markdown content. We think this contradicts the beautiful simplicity of Markdown's syntax.
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{{% glossary-term shortcode %}}
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Hugo created **shortcodes** to circumvent these limitations.
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There are three types of shortcodes: embedded, custom, and inline.
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A shortcode is a simple snippet inside a content file that Hugo will render using a predefined template. Note that shortcodes will not work in template files. If you need the type of drop-in functionality that shortcodes provide but in a template, you most likely want a [partial template][partials] instead.
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## Embedded
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In addition to cleaner Markdown, shortcodes can be updated any time to reflect new classes, techniques, or standards. At the point of site generation, Hugo shortcodes will easily merge in your changes. You avoid a possibly complicated search and replace operation.
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Hugo's embedded shortcodes are pre-defined templates within the application. Refer to each shortcode's documentation for specific usage instructions and available arguments.
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## Use shortcodes
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{{< list-pages-in-section path=/shortcodes >}}
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{{< youtube 2xkNJL4gJ9E >}}
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## Custom
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In your content files, a shortcode can be called by calling `{{%/* shortcodename arguments */%}}`. Shortcode arguments are space delimited, and arguments with internal spaces must be quoted.
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Create custom shortcodes to simplify and standardize content creation. For example, the following shortcode template generates an audio player using a [global resource](g):
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The first word in the shortcode declaration is always the name of the shortcode. Arguments follow the name. Depending upon how the shortcode is defined, the arguments may be named, positional, or both, although you can't mix argument types in a single call. The format for named arguments models that of HTML with the format `name="value"`.
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{{< code file=layouts/shortcodes/audio.html >}}
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{{ with resources.Get (.Get "src") }}
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<audio controls preload="auto" src="{{ .RelPermalink }}"></audio>
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{{ end }}
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{{< /code >}}
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Some shortcodes use or require closing shortcodes. Again like HTML, the opening and closing shortcodes match (name only) with the closing declaration, which is prepended with a slash.
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Then call the shortcode from within markup:
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Here are two examples of paired shortcodes:
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{{< code file=content/example.md >}}
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{{</* audio src=/audio/test.mp3 */>}}
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{{< /code >}}
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```go-html-template
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{{%/* mdshortcode */%}}Stuff to `process` in the *center*.{{%/* /mdshortcode */%}}
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Learn more about creating shortcodes in the [shortcode templates] section.
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[shortcode templates]: /templates/shortcode/
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## Inline
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An inline shortcode is a shortcode template defined within content.
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Hugo's security model is based on the premise that template and configuration authors are trusted, but content authors are not. This model enables generation of HTML output safe against code injection.
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To conform with this security model, creating shortcode templates within content is disabled by default. If you trust your content authors, you can enable this functionality in your site's configuration:
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{{< code-toggle file=hugo >}}
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[security]
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enableInlineShortcodes = true
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{{< /code-toggle >}}
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The following example demonstrates an inline shortcode, `date.inline`, that accepts a single positional argument: a date/time [layout string].
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[layout string]: /functions/time/format/#layout-string
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{{< code file=content/example.md >}}
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Today is
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{{</* date.inline ":date_medium" */>}}
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{{- now | time.Format (.Get 0) -}}
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{{</* /date.inline */>}}.
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Today is {{</* date.inline ":date_full" */>}}.
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{{< /code >}}
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In the example above, the inline shortcode is executed twice: once upon definition and again when subsequently called. Hugo renders this to:
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```html
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<p>Today is Jan 30, 2025.</p>
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<p>Today is Thursday, January 30, 2025</p>
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```
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```go-html-template
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{{</* highlight go */>}} A bunch of code here {{</* /highlight */>}}
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Inline shortcodes process their inner content within the same context as regular shortcode templates, allowing you to use any available [shortcode method].
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[shortcode method]: /templates/shortcode/#methods
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{{% note %}}
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You cannot [nest](#nesting) inline shortcodes.
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{{% /note %}}
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Learn more about creating shortcodes in the [shortcode templates] section.
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## Calling
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Shortcode calls involve three syntactical elements: tags, arguments, and notation.
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### Tags
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Some shortcodes expect content between opening and closing tags. For example, the embedded [`details`] shortcode requires an opening and closing tag:
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```text
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{{</* details summary="See the details" */>}}
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This is a **bold** word.
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{{</* /details */>}}
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```
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The examples above use two different delimiters, the difference being the `%` character in the first and the `<>` characters in the second.
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Some shortcodes do not accept content. For example, the embedded [`instagram`] shortcode requires a single _positional_ argument:
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### Shortcodes with raw string arguments
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```text
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{{</* instagram CxOWiQNP2MO */>}}
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```
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You can pass multiple lines as arguments to a shortcode by using raw string literals:
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Some shortcodes optionally accept content. For example, you can call the embedded [`qr`] shortcode with content:
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```go-html-template
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```text
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{{</* qr */>}}
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https://gohugo.io
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{{</* /qr */>}}
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```
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Or use the self-closing syntax with a trailing slash to pass the text as an argument:
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```text
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{{</* qr text=https://gohugo.io /*/>}}
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```
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[`details`]: /shortcodes/details
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[`instagram`]: /shortcodes/instagram
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[`qr`]: /shortcodes/qr
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Refer to each shortcode's documentation for specific usage instructions and available arguments.
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### Arguments
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Shortcode arguments can be either _named_ or _positional_.
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Named arguments are passed as case-sensitive key-value pairs, as seen in this example with the embedded [`figure`] shortcode. The `src` argument, for instance, is required.
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[`figure`]: /shortcodes/figure
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```text
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{{</* figure src=/images/kitten.jpg */>}}
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```
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Positional arguments, on the other hand, are determined by their position. The embedded `instagram` shortcode, for example, expects the first argument to be the Instagram post ID.
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```text
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{{</* instagram CxOWiQNP2MO */>}}
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```
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Shortcode arguments are space delimited, and arguments with internal spaces must be quoted.
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```text
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{{</* figure src=/images/kitten.jpg alt="A white kitten" */>}}
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```
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Shortcodes accept [scalar](g) arguments, one of [string](g), [integer](g), [floating point](g), or [boolean](g).
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```text
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{{</* my-shortcode name="John Smith" age=24 married=false */>}}
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```
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You can optionally use multiple lines when providing several arguments to a shortcode for better readability:
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```text
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{{</* figure
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src=/images/kitten.jpg
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alt="A white kitten"
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caption="This is a white kitten"
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loading=lazy
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*/>}}
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```
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Use a [raw string literal](g) if you need to pass a multiline string:
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```text
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{{</* myshortcode `This is some <b>HTML</b>,
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and a new line with a "quoted string".` */>}}
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```
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### Shortcodes with Markdown
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Shortcodes can accept named arguments, positional arguments, or both, but you must use either named or positional arguments exclusively within a single shortcode call; mixing them is not allowed.
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Shortcodes using the `%` as the outer-most delimiter will be fully rendered when sent to the content renderer. This means that the rendered output from a shortcode can be part of the page's table of contents, footnotes, etc.
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Refer to each shortcode's documentation for specific usage instructions and available arguments.
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### Shortcodes without Markdown
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### Notation
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The `<` character indicates that the shortcode's inner content does *not* need further rendering. Often shortcodes without Markdown include internal HTML:
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Shortcodes can be called using two different notations, distinguished by their tag delimiters.
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```go-html-template
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{{</* myshortcode */>}}<p>Hello <strong>World!</strong></p>{{</* /myshortcode */>}}
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Notation|Example
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:--|:--
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Markdown|`{{%/* foo */%}} ## Section 1 {{%/* /foo */%}}`
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Standard|`{{</* foo */>}} ## Section 2 {{</* /foo */>}}`
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###### Markdown notation
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Hugo processes the shortcode before the page content is rendered by the Markdown renderer. This means, for instance, that Markdown headings inside a Markdown-notation shortcode will be included when invoking the [`TableOfContents`] method on the `Page` object.
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[`TableOfContents`]: /methods/page/tableofcontents/
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###### Standard notation
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With standard notation, Hugo processes the shortcode separately, merging the output into the page content after Markdown rendering. This means, for instance, that Markdown headings inside a standard-notation shortcode will be excluded when invoking the `TableOfContents` method on the `Page` object.
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By way of example, with this shortcode template:
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{{< code file=layouts/shortcodes/foo.html >}}
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{{ .Inner }}
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{{< /code >}}
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And this markdown:
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{{< code file=content/example.md >}}
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{{%/* foo */%}} ## Section 1 {{%/* /foo */%}}
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{{</* foo */>}} ## Section 2 {{</* /foo */>}}
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{{< /code >}}
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Hugo renders this HTML:
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```html
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<h2 id="heading">Section 1</h2>
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## Section 2
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```
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### Nested shortcodes
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In the above, "Section 1" will be included when invoking the `TableOfContents` method, while "Section 2" will not.
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You can call shortcodes within other shortcodes by creating your own templates that leverage the `.Parent` method. `.Parent` allows you to check the context in which the shortcode is being called. See [Shortcode templates][sctemps].
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The shortcode author determines which notation to use. Consult each shortcode's documentation for specific usage instructions and available arguments.
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## Embedded shortcodes
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## Nesting
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See the [shortcodes](/shortcodes/) section.
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Shortcodes (excluding [inline](#inline) shortcodes) can be nested, creating parent-child relationships. For example, a gallery shortcode might contain several image shortcodes:
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## Privacy configuration
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{{< code file=content/example.md >}}
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{{</* gallery class="content-gallery" */>}}
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{{</* image src="/images/a.jpg" */>}}
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{{</* image src="/images/b.jpg" */>}}
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{{</* image src="/images/c.jpg" */>}}
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{{</* /gallery */>}}
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{{< /code >}}
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To learn how to configure your Hugo site to meet the new EU privacy regulation, see [privacy protections].
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The [shortcode templates][nesting] section provides a detailed explantion and examples.
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## Create custom shortcodes
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To learn more about creating custom shortcodes, see the [shortcode template documentation].
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[privacy protections]: /about/privacy/
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[partials]: /templates/partial/
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[quickstart]: /getting-started/quick-start/
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[sctemps]: /templates/shortcode/
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[shortcode template documentation]: /templates/shortcode/
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[Vimeo]: https://vimeo.com/
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[YouTube Videos]: https://www.youtube.com/
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[nesting]: /templates/shortcode/#nesting
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reference: /content-management/shortcodes
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---
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A [template](g) called from within Markdown, taking zero or more [arguments](g).
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A _shortcode_ is a [_template_](g) invoked within markup, accepting any number of [_arguments_](g). They can be used with any [content format](g) to insert elements such as videos, images, and social media embeds into your content.
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---
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title: Scratch
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description: Returns a "scratch pad" on the given page to store and manipulate data.
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description: Returns a "scratch pad" to store and manipulate data, scoped to the current page.
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categories: []
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keywords: []
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action:
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---
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title: Scratch
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description: Returns a "scratch pad" scoped to the shortcode to store and manipulate data.
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description: Returns a "scratch pad" to store and manipulate data, scoped to the current shortcode.
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categories: []
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keywords: []
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action:
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---
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title: Home templates
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title: Home page templates
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description: The home page of a website is often formatted differently than the other pages. For this reason, Hugo makes it easy for you to define your new site's home page as a unique template.
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categories: [templates]
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keywords: []
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@ -12,43 +12,53 @@ toc: true
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aliases: [/layout/homepage/,/templates/homepage-template/,/templates/homepage/]
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---
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The home template is the *only* required template for building a site and therefore useful when bootstrapping a new site and template. It is also the only required template if you are developing a single-page website.
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## Introduction
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{{< youtube ut1xtRZ1QOA >}}
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## Home template lookup order
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See [Template Lookup](/templates/lookup-order/).
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## Add content and front matter to the home page
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The home page accepts content and front matter from an `_index.md` file. This file should live at the root of your `content` directory (i.e., `content/_index.md`). You can then add body copy and metadata to your home page the way you would any other content file.
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See the home template below or [Content Organization][contentorg] for more information on the role of `_index.md` in adding content and front matter to list pages.
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## Example home template
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A home page template is used to render your site's home page, and is the only template required for a single-page website. For example, the home page template below inherits the site's shell from the base template and renders the home page content, such as a list of other pages.
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{{< code file=layouts/_default/home.html >}}
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{{ define "main" }}
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<main aria-role="main">
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<header class="home-page-header">
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<h1>{{ .Title }}</h1>
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{{ with .Params.subtitle }}
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<span class="subtitle">{{ . }}</span>
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{{ end }}
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</header>
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<div class="home-page-content">
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<!-- Note that the content for index.html, as a sort of list page, will pull from content/_index.md -->
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{{ .Content }}
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</div>
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<div>
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{{ range first 10 .Site.RegularPages }}
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{{ .Render "summary" }}
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{{ end }}
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</div>
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</main>
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{{ .Content }}
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{{ range site.RegularPages }}
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<h2><a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a></h2>
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{{ end }}
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{{ end }}
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{{< /code >}}
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[contentorg]: /content-management/organization/
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[lookup]: /templates/lookup-order/
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{{% include "templates/_common/filter-sort-group.md" %}}
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## Lookup order
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Hugo's [template lookup order] determines the template path, allowing you to create unique templates for any page.
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[template lookup order]: /templates/lookup-order/#home-templates
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{{% note %}}
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You must have thorough understanding of the template lookup order when creating templates. Template selection is based on template type, page kind, content type, section, language, and output format.
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{{% /note %}}
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## Content and front matter
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The home page template uses content and front matter from an `_index.md` file located in the root of your content directory.
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{{< code-toggle file=content/_index.md fm=true >}}
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---
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title: The Home Page
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date: 2025-01-30T03:36:57-08:00
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draft: false
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params:
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subtitle: The Subtitle
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---
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{{< /code-toggle >}}
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The home page template below inherits the site's shell from the base template, renders the subtitle and content as defined in the `_index.md` file, then renders of list of the site's [regular pages](g).
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{{< code file=layouts/_default/home.html >}}
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{{ define "main" }}
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<h3>{{ .Params.Subtitle }}</h3>
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{{ .Content }}
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{{ range site.RegularPages }}
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<h2><a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a></h2>
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{{ end }}
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{{ end }}
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{{< /code >}}
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@ -1,6 +1,6 @@
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---
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title: Section templates
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description: Use section templates to list members of a section.
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description: Create a section template to list its members.
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categories: [templates]
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keywords: []
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menu:
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@ -1,7 +1,6 @@
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---
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title: Create your own shortcodes
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linkTitle: Shortcode templates
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description: You can extend Hugo's embedded shortcodes by creating your own using the same templating syntax as that for single and list pages.
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title: Shortcode templates
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description: Create custom shortcodes to simplify and standardize content creation.
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categories: [templates]
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keywords: []
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menu:
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@ -13,31 +12,54 @@ aliases: [/templates/shortcode-templates/]
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toc: true
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---
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Shortcodes are a means to consolidate templating into small, reusable snippets that you can embed directly inside your content.
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{{% note %}}
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Hugo also ships with embedded shortcodes for common use cases. (See [Content Management: Shortcodes](/content-management/shortcodes/).)
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Before creating custom shortcodes, please review the [shortcodes] page in the [content management] section. Understanding the usage details will help you design and create better templates.
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[shortcodes]: /content-management/shortcodes/
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[content management]: /content-management/shortcodes/
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{{% /note %}}
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## Create custom shortcodes
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## Introduction
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Hugo's embedded shortcodes cover many common, but not all, use cases. Luckily, Hugo provides the ability to easily create custom shortcodes to meet your website's needs.
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Hugo provides [embedded shortcodes] for many common tasks, but you'll likely need to create your own for more specific needs. Some examples of custom shortcodes you might develop include:
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{{< youtube Eu4zSaKOY4A >}}
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||||
- Audio players
|
||||
- Video players
|
||||
- Image galleries
|
||||
- Diagrams
|
||||
- Maps
|
||||
- Tables
|
||||
- And many other custom elements
|
||||
|
||||
### File location
|
||||
[embedded shortcodes]: /shortcodes/
|
||||
|
||||
To create a shortcode, place an HTML template in the `layouts/shortcodes` directory. Consider the file name carefully since the shortcode name will mirror that of the file but without the `.html` extension. For example, `layouts/shortcodes/myshortcode.html` will be called with either `{{</* myshortcode /*/>}}` or `{{%/* myshortcode /*/%}}`.
|
||||
## Directory structure
|
||||
|
||||
You can organize your shortcodes in subdirectories, e.g. in `layouts/shortcodes/boxes`. These shortcodes would then be accessible with their relative path, e.g:
|
||||
Create shortcode templates within the `layouts/shortcodes` directory, either at its root or organized into subdirectories.
|
||||
|
||||
```go-html-template
|
||||
{{</* boxes/square */>}}
|
||||
```text
|
||||
layouts/
|
||||
└── shortcodes/
|
||||
├── diagrams/
|
||||
│ ├── kroki.html
|
||||
│ └── plotly.html
|
||||
├── media/
|
||||
│ ├── audio.html
|
||||
│ ├── gallery.html
|
||||
│ └── video.html
|
||||
├── capture.html
|
||||
├── column.html
|
||||
├── include.html
|
||||
└── row.html
|
||||
```
|
||||
|
||||
Note the forward slash.
|
||||
When calling a shortcode in a subdirectory, specify its path relative to the `shortcode` directory, excluding the file extension.
|
||||
|
||||
### Template lookup order
|
||||
```text
|
||||
{{</* media/audio path=/audio/podcast/episode-42.mp3 */>}}
|
||||
```
|
||||
|
||||
## Lookup order
|
||||
|
||||
Hugo selects shortcode templates based on the shortcode name, the current output format, and the current language. The examples below are sorted by specificity in descending order. The least specific path is at the bottom of the list.
|
||||
|
||||
@ -50,277 +72,225 @@ foo|html|en|`layouts/shortcodes/foo.html.en.html`
|
||||
|
||||
Shortcode name|Output format|Language|Template path
|
||||
:--|:--|:--|:--
|
||||
foo|rss|en|`layouts/shortcodes/foo.en.xml`
|
||||
foo|rss|en|`layouts/shortcodes/foo.rss.xml`
|
||||
foo|rss|en|`layouts/shortcodes/foo.en.html`
|
||||
foo|rss|en|`layouts/shortcodes/foo.rss.en.xml`
|
||||
foo|rss|en|`layouts/shortcodes/foo.xml`
|
||||
foo|rss|en|`layouts/shortcodes/foo.html.en.html`
|
||||
foo|rss|en|`layouts/shortcodes/foo.html.html`
|
||||
foo|rss|en|`layouts/shortcodes/foo.html`
|
||||
foo|json|en|`layouts/shortcodes/foo.en.json`
|
||||
foo|json|en|`layouts/shortcodes/foo.json`
|
||||
foo|json|en|`layouts/shortcodes/foo.json.json`
|
||||
foo|json|en|`layouts/shortcodes/foo.json.en.json`
|
||||
|
||||
Note that templates provided by a theme or module always take precedence.
|
||||
## Methods
|
||||
|
||||
### Positional vs. named arguments
|
||||
Use these methods in your shortcode templates. Refer to each methods's documentation for details and examples.
|
||||
|
||||
You can create shortcodes using the following types of arguments:
|
||||
{{< list-pages-in-section path=/methods/shortcode >}}
|
||||
|
||||
* Positional arguments
|
||||
* Named arguments
|
||||
* Positional *or* named arguments
|
||||
## Examples
|
||||
|
||||
In shortcodes with positional arguments, the order of the arguments is important. If a shortcode has a single required value, positional arguments require less typing from content authors.
|
||||
These examples range in complexity from simple to moderately advanced, with some simplified for clarity.
|
||||
|
||||
For more complex layouts with multiple or optional arguments, named arguments work best. While less terse, named arguments require less memorization from a content author and can be added in a shortcode declaration in any order.
|
||||
### Insert year
|
||||
|
||||
Allowing both types of arguments is useful for complex layouts where you want to set default values that can be easily overridden by users.
|
||||
|
||||
### Access arguments
|
||||
|
||||
All shortcode arguments can be accessed via the `.Get` method. Whether you pass a string or a number to the `.Get` method depends on whether you are accessing a named or positional argument, respectively.
|
||||
|
||||
To access an argument by name, use the `.Get` method followed by the named argument as a quoted string:
|
||||
|
||||
```go-html-template
|
||||
{{ .Get "class" }}
|
||||
```
|
||||
|
||||
To access an argument by position, use the `.Get` followed by a numeric position, keeping in mind that positional arguments are zero-indexed:
|
||||
|
||||
```go-html-template
|
||||
{{ .Get 0 }}
|
||||
```
|
||||
|
||||
For the second position, you would just use:
|
||||
|
||||
```go-html-template
|
||||
{{ .Get 1 }}
|
||||
```
|
||||
|
||||
`with` is great when the output depends on a argument being set:
|
||||
|
||||
```go-html-template
|
||||
{{ with .Get "class" }} class="{{ . }}"{{ end }}
|
||||
```
|
||||
|
||||
`.Get` can also be used to check if a argument has been provided. This is
|
||||
most helpful when the condition depends on either of the values, or both:
|
||||
|
||||
```go-html-template
|
||||
{{ if or (.Get "title") (.Get "alt") }} alt="{{ with .Get "alt" }}{{ . }}{{ else }}{{ .Get "title" }}{{ end }}"{{ end }}
|
||||
```
|
||||
|
||||
#### `.Inner`
|
||||
|
||||
The `.Inner` method returns the content between the opening and closing shortcode tags. To check if `.Inner` returns anything other than whitespace:
|
||||
|
||||
```go-html-template
|
||||
{{ if strings.ContainsNonSpace .Inner }}
|
||||
Inner is not empty
|
||||
{{ end }}
|
||||
```
|
||||
|
||||
{{% note %}}
|
||||
Any shortcode that calls the `.Inner` method must be closed or self-closed. To call a shortcode using the self-closing syntax.
|
||||
|
||||
```go-html-template
|
||||
{{</* innershortcode /*/>}}
|
||||
```
|
||||
|
||||
{{% /note %}}
|
||||
|
||||
#### `.Params`
|
||||
|
||||
The `.Params` method in shortcodes returns the arguments passed to the shortcode for more complicated use cases. You can also access higher-scoped arguments with the following logic:
|
||||
|
||||
$.Params
|
||||
: these are the arguments passed directly into the shortcode declaration (e.g., a YouTube video ID)
|
||||
|
||||
$.Page.Params
|
||||
: refers to the page's parameters; the "page" in this case refers to the content file in which the shortcode is declared (e.g., a `shortcode_color` field in a content's front matter could be accessed via `$.Page.Params.shortcode_color`).
|
||||
|
||||
$.Site.Params
|
||||
: refers to parameters defined in your site configuration.
|
||||
|
||||
#### `.IsNamedParams`
|
||||
|
||||
The `.IsNamedParams` method checks whether the shortcode declaration uses named arguments and returns a boolean value.
|
||||
|
||||
For example, you could create an `image` shortcode that can take either a `src` named argument or the first positional argument, depending on the preference of the content's author. Let's assume the `image` shortcode is called as follows:
|
||||
|
||||
```go-html-template
|
||||
{{</* image src="images/my-image.jpg" */>}}
|
||||
```
|
||||
|
||||
You could then include the following as part of your shortcode templating:
|
||||
|
||||
```go-html-template
|
||||
{{ if .IsNamedParams }}
|
||||
<img src="{{ .Get "src" }}" alt="">
|
||||
{{ else }}
|
||||
<img src="{{ .Get 0 }}" alt="">
|
||||
{{ end }}
|
||||
```
|
||||
|
||||
See the [example Vimeo shortcode][vimeoexample] below for `.IsNamedParams` in action.
|
||||
|
||||
{{% note %}}
|
||||
While you can create shortcode templates that accept both positional and named arguments, you *cannot* declare shortcodes in content with a mix of argument types. Therefore, a shortcode declared like `{{</* image src="images/my-image.jpg" "This is my alt text" */>}}` will return an error.
|
||||
{{% /note %}}
|
||||
|
||||
Shortcodes can also be nested. In a nested shortcode, you can access the parent shortcode context with the [`.Parent`] shortcode method. This can be very useful for inheritance from the root.
|
||||
|
||||
### Checking for existence
|
||||
|
||||
You can check if a specific shortcode is used on a page by calling `.HasShortcode` in that page template, providing the name of the shortcode. This is useful when you want to include specific scripts or styles in the header that are only used by that shortcode.
|
||||
|
||||
## Custom shortcode examples
|
||||
|
||||
The following are examples of the different types of shortcodes you can create via shortcode template files in `/layouts/shortcodes`.
|
||||
|
||||
### Single-word example: `year`
|
||||
|
||||
Let's assume you would like to keep mentions of your copyright year current in your content files without having to continually review your Markdown. Your goal is to be able to call the shortcode as follows:
|
||||
|
||||
```go-html-template
|
||||
{{</* year */>}}
|
||||
```
|
||||
Create a shortcode to insert the current year:
|
||||
|
||||
{{< code file=layouts/shortcodes/year.html >}}
|
||||
{{ now.Format "2006" }}
|
||||
{{- now.Format "2006" -}}
|
||||
{{< /code >}}
|
||||
|
||||
### Single positional example: `youtube`
|
||||
Then call the shortcode from within your markup:
|
||||
|
||||
Embedded videos are a common addition to Markdown content. The following is the code used by [Hugo's built-in YouTube shortcode][youtubeshortcode]:
|
||||
{{< code file=content/example.md >}}
|
||||
This is {{</* year */>}}, and look at how far we've come.
|
||||
{{< /code >}}
|
||||
|
||||
```go-html-template
|
||||
{{</* youtube 09jf3ow9jfw */>}}
|
||||
This shortcode can be used inline or as a block on its own line. If a shortcode might be used inline, remove the surrounding [whitespace] by using [template action](g) delimiters with hyphens.
|
||||
|
||||
[whitespace]: /templates/introduction/#whitespace
|
||||
|
||||
### Insert image
|
||||
|
||||
This example assumes the following content structure, where `content/example/index.md` is a [page bundle](g) containing one or more [page resources](g).
|
||||
|
||||
```text
|
||||
content/
|
||||
├── example/
|
||||
│ ├── a.jpg
|
||||
│ └── index.md
|
||||
└── _index.md
|
||||
```
|
||||
|
||||
Would load the template at `/layouts/shortcodes/youtube.html`:
|
||||
Create a shortcode to capture an image as a page resource, resize it to the given width, convert it to the WebP format, and add an `alt` attribute:
|
||||
|
||||
{{< code file=layouts/shortcodes/youtube.html >}}
|
||||
<div class="embed video-player">
|
||||
<iframe class="youtube-player" type="text/html" width="640" height="385" src="https://www.youtube.com/embed/{{ index .Params 0 }}" allowfullscreen frameborder="0">
|
||||
</iframe>
|
||||
</div>
|
||||
{{< code file=layouts/shortcodes/image.html >}}
|
||||
{{- with .Page.Resources.Get (.Get "path") }}
|
||||
{{- with .Process (printf "resize %dx wepb" ($.Get "width")) }}
|
||||
<img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="{{ $.Get "alt" }}">
|
||||
{{- end }}
|
||||
{{- end -}}
|
||||
{{< /code >}}
|
||||
|
||||
{{< code file=youtube-embed.html >}}
|
||||
<div class="embed video-player">
|
||||
<iframe class="youtube-player" type="text/html"
|
||||
width="640" height="385"
|
||||
src="https://www.youtube.com/embed/09jf3ow9jfw"
|
||||
allowfullscreen frameborder="0">
|
||||
</iframe>
|
||||
</div>
|
||||
Then call the shortcode from within your markup:
|
||||
|
||||
{{< code file=content/example/index.md >}}
|
||||
{{</* image path=a.jpg width=300 alt="A white kitten" */>}}
|
||||
{{< /code >}}
|
||||
|
||||
### Single named example: `image`
|
||||
The example above uses:
|
||||
|
||||
Let's say you want to create your own `img` shortcode rather than use Hugo's built-in [`figure` shortcode][figure]. Your goal is to be able to call the shortcode as follows in your content files:
|
||||
- The [`with`] statement to rebind the [context](g) after each successful operation
|
||||
- The [`Get`] method to retrieve arguments by name
|
||||
- The `$` to access the template context
|
||||
|
||||
{{< code file=content-image.md >}}
|
||||
{{</* img src="/media/spf13.jpg" title="Steve Francia" */>}}
|
||||
[`get`]: /methods/shortcode/get/
|
||||
[`with`]: /functions/go-template/with/
|
||||
|
||||
{{% note %}}
|
||||
Make sure that you thoroughly understand the concept of context. The most common templating errors made by new users relate to context.
|
||||
|
||||
Read more about context in the [introduction to templating].
|
||||
|
||||
[introduction to templating]: /templates/introduction/
|
||||
{{% /note %}}
|
||||
|
||||
### Insert image with error handling
|
||||
|
||||
The previous example, while functional, silently fails if the image is missing, and does not gracefully exit if a required argument is missing. We'll add error handling to address these issues:
|
||||
|
||||
{{< code file=layouts/shortcodes/image.html >}}
|
||||
{{ with .Get "path" }}
|
||||
{{- with $r := $.Page.Resources.Get ($.Get "path") }}
|
||||
{{- with $.Get "width" }}
|
||||
{{- with $r.Process (printf "resize %dx wepb" ($.Get "width" )) }}
|
||||
{{- $alt := or ($.Get "alt") "" }}
|
||||
<img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="{{ $alt }}">
|
||||
{{- end }}
|
||||
{{- else }}
|
||||
{{- errorf "The %q shortcode requires a 'width' argument: see %s" $.Name $.Position }}
|
||||
{{- end }}
|
||||
{{- else }}
|
||||
{{ warnf "The %q shortcode was unable to find %s: see %s" $.Name ($.Get "path") $.Position }}
|
||||
{{- end }}
|
||||
{{- else }}
|
||||
{{ errorf "The %q shortcode requires a 'path' argument: see %s" .Name .Position }}
|
||||
{{- end -}}
|
||||
{{< /code >}}
|
||||
|
||||
You have created the shortcode at `/layouts/shortcodes/img.html`, which loads the following shortcode template:
|
||||
This template throws an error and gracefully fails the build if the author neglected to provide a `path` or `width` argument, and it emits a warning if it cannot find the image at the specified path. If the author does not provide an `alt` argument, the `alt` attribute is set to an empty string.
|
||||
|
||||
{{< code file=layouts/shortcodes/img.html >}}
|
||||
<!-- image -->
|
||||
<figure {{ with .Get "class" }}class="{{ . }}"{{ end }}>
|
||||
{{ with .Get "link" }}<a href="{{ . }}">{{ end }}
|
||||
<img src="{{ .Get "src" }}" {{ if or (.Get "alt") (.Get "caption") }}alt="{{ with .Get "alt" }}{{ . }}{{ else }}{{ .Get "caption" }}{{ end }}"{{ end }} />
|
||||
{{ if .Get "link" }}</a>{{ end }}
|
||||
{{ if or (or (.Get "title") (.Get "caption")) (.Get "attr") }}
|
||||
<figcaption>{{ if isset .Params "title" }}
|
||||
<h4>{{ .Get "title" }}</h4>{{ end }}
|
||||
{{ if or (.Get "caption") (.Get "attr") }}<p>
|
||||
{{ .Get "caption" }}
|
||||
{{ with .Get "attrlink" }}<a href="{{ . }}"> {{ end }}
|
||||
{{ .Get "attr" }}
|
||||
{{ if .Get "attrlink" }}</a> {{ end }}
|
||||
</p> {{ end }}
|
||||
</figcaption>
|
||||
{{ end }}
|
||||
</figure>
|
||||
<!-- image -->
|
||||
{{< /code >}}
|
||||
The [`Name`] and [`Position`] methods provide helpful context for errors and warnings. For example, a missing `width` argument causes the shortcode to throw this error:
|
||||
|
||||
Would be rendered as:
|
||||
[`name`]: /methods/shortcode/name/
|
||||
[`position`]: /methods/shortcode/position/
|
||||
|
||||
{{< code file=img-output.html >}}
|
||||
<figure>
|
||||
<img src="/media/spf13.jpg" />
|
||||
<figcaption>
|
||||
<h4>Steve Francia</h4>
|
||||
</figcaption>
|
||||
</figure>
|
||||
{{< /code >}}
|
||||
|
||||
### Single flexible example: `vimeo`
|
||||
|
||||
```go-html-template
|
||||
{{</* vimeo 49718712 */>}}
|
||||
{{</* vimeo id="49718712" class="flex-video" */>}}
|
||||
```text
|
||||
ERROR The "image" shortcode requires a 'width' argument: see "/home/user/project/content/example/index.md:7:1"
|
||||
```
|
||||
|
||||
Would load the template found at `/layouts/shortcodes/vimeo.html`:
|
||||
### Positional arguments
|
||||
|
||||
{{< code file=layouts/shortcodes/vimeo.html >}}
|
||||
{{ if .IsNamedParams }}
|
||||
<div class="{{ if .Get "class" }}{{ .Get "class" }}{{ else }}vimeo-container{{ end }}">
|
||||
<iframe src="https://player.vimeo.com/video/{{ .Get "id" }}" allowfullscreen></iframe>
|
||||
</div>
|
||||
{{ else }}
|
||||
<div class="{{ if len .Params | eq 2 }}{{ .Get 1 }}{{ else }}vimeo-container{{ end }}">
|
||||
<iframe src="https://player.vimeo.com/video/{{ .Get 0 }}" allowfullscreen></iframe>
|
||||
</div>
|
||||
{{ end }}
|
||||
Shortcode arguments can be [named or positional]. We used named arguments previously; let's explore positional arguments. Here's the named argument version of our example:
|
||||
|
||||
[named or positional]: /content-management/shortcodes/#arguments
|
||||
|
||||
{{< code file=content/example/index.md >}}
|
||||
{{</* image path=a.jpg width=300 alt="A white kitten" */>}}
|
||||
{{< /code >}}
|
||||
|
||||
Would be rendered as:
|
||||
Here's how to call it with positional arguments:
|
||||
|
||||
{{< code file=vimeo-iframes.html >}}
|
||||
<div class="vimeo-container">
|
||||
<iframe src="https://player.vimeo.com/video/49718712" allowfullscreen></iframe>
|
||||
</div>
|
||||
<div class="flex-video">
|
||||
<iframe src="https://player.vimeo.com/video/49718712" allowfullscreen></iframe>
|
||||
{{< code file=content/example/index.md >}}
|
||||
{{</* image a.jpg 300 "A white kitten" */>}}
|
||||
{{< /code >}}
|
||||
|
||||
Using the `Get` method with zero-indexed keys, we'll initialize variables with descriptive names in our template:
|
||||
|
||||
{{< code file=layouts/shortcodes/image.html >}}
|
||||
{{- $path := .Get 0 }}
|
||||
{{- $width := .Get 1 }}
|
||||
{{- $alt := .Get 2 }}
|
||||
{{< /code >}}
|
||||
|
||||
{{% note %}}
|
||||
Positional arguments work well for frequently used shortcodes with one or two arguments. Since you'll use them often, the argument order will be easy to remember. For less frequently used shortcodes, or those with more than two arguments, named arguments improve readability and reduce the chance of errors.
|
||||
{{% /note %}}
|
||||
|
||||
### Named and positional arguments
|
||||
|
||||
You can create a shortcode that will accept both named and positional arguments, but not at the same time. Use the [`IsNamedParams`] method to determine whether the shortcode call used named or positional arguments:
|
||||
|
||||
{{< code file=layouts/shortcodes/image.html >}}
|
||||
{{- $path := cond (.IsNamedParams) (.Get "path") (.Get 0) }}
|
||||
{{- $width := cond (.IsNamedParams) (.Get "width") (.Get 1) }}
|
||||
{{- $alt := cond (.IsNamedParams) (.Get "alt") (.Get 2) }}
|
||||
{{< /code >}}
|
||||
|
||||
This example uses the `cond` alias for the [`compare.Conditional`] function to get the argument by name if `IsNamedParams` returns `true`, otherwise get the argument by position.
|
||||
|
||||
[`compare.Conditional`]: /functions/compare/conditional/
|
||||
[`IsNamedParams`]: /methods/shortcode/isnamedparams/
|
||||
|
||||
### Argument collection
|
||||
|
||||
Use the [`Params`] method to access the arguments as a collection.
|
||||
|
||||
[`Params`]: /methods/shortcode/params/
|
||||
|
||||
When using named arguments, the `Params` method returns a map:
|
||||
|
||||
{{< code file=content/example/index.md >}}
|
||||
{{</* image path=a.jpg width=300 alt="A white kitten" */>}}
|
||||
{{< /code >}}
|
||||
|
||||
{{< code file=layouts/shortcodes/image.html >}}
|
||||
{{- .Params.path }} → a.jpg
|
||||
{{- .Params.width }} → 300
|
||||
{{- .Params.alt }} → A white kitten
|
||||
{{< /code >}}
|
||||
|
||||
When using positional arguments, the `Params` method returns a slice:
|
||||
|
||||
{{< code file=content/example/index.md >}}
|
||||
{{</* image a.jpg 300 "A white kitten" */>}}
|
||||
{{< /code >}}
|
||||
|
||||
{{< code file=layouts/shortcodes/image.html >}}
|
||||
{{- index .Params 0 }} → a.jpg
|
||||
{{- index .Params 1 }} → 300
|
||||
{{- index .Params 1 }} → A white kitten
|
||||
{{< /code >}}
|
||||
|
||||
Combine the `Params` method with the [`collections.IsSet`] function to determine if a parameter is set, even if its value is falsy.
|
||||
|
||||
[`collections.IsSet`]: /functions/collections/isset/
|
||||
|
||||
### Inner content
|
||||
|
||||
Extract the content enclosed within shortcode tags using the [`Inner`] method. This example demonstrates how to pass both content and a title to a shortcode. The shortcode then generates a `div` element containing an `h2` element (displaying the title) and the provided content.
|
||||
|
||||
[`Inner`]: /methods/shortcode/inner/
|
||||
|
||||
{{< code file=content/example.md >}}
|
||||
{{</* contrived title="A Contrived Example" */>}}
|
||||
This is a **bold** word, and this is an _emphasized_ word.
|
||||
{{</* /contrived */>}}
|
||||
{{< /code >}}
|
||||
|
||||
{{< code file=layouts/shortcodes/contrived.html >}}
|
||||
<div class="contrived">
|
||||
<h2>{{ .Get "title" }}</h2>
|
||||
{{ .Inner | .Page.RenderString }}
|
||||
</div>
|
||||
{{< /code >}}
|
||||
|
||||
### Paired example: `highlight`
|
||||
The preceding example called the shortcode using [standard notation], requiring us to process the inner content with the [`RenderString`] method to convert the Markdown to HTML. This conversion is unnecessary when calling a shortcode using [Markdown notation].
|
||||
|
||||
The following is taken from `highlight`, which is a [built-in shortcode] that ships with Hugo.
|
||||
[`RenderString`]: /methods/page/renderstring/
|
||||
[markdown notation]: /content-management/shortcodes/#markdown-notation
|
||||
[standard notation]: /content-management/shortcodes/#standard-notation
|
||||
|
||||
{{< code file=highlight-example.md >}}
|
||||
{{</* highlight html */>}}
|
||||
<html>
|
||||
<body> This HTML </body>
|
||||
</html>
|
||||
{{</* /highlight */>}}
|
||||
{{< /code >}}
|
||||
### Nesting
|
||||
|
||||
The template for the `highlight` shortcode uses the following code, which is already included in Hugo:
|
||||
The [`Parent`] method provides access to the parent shortcode context when the shortcode in question is called within the context of a parent shortcode. This provides an inheritance model.
|
||||
|
||||
```go-html-template
|
||||
{{ .Get 0 | highlight .Inner }}
|
||||
```
|
||||
|
||||
The rendered output of the HTML example code block will be as follows:
|
||||
|
||||
{{< code file=syntax-highlighted.html >}}
|
||||
<div class="highlight" style="background: #272822"><pre style="line-height: 125%"><span style="color: #f92672"><html></span>
|
||||
<span style="color: #f92672"><body></span> This HTML <span style="color: #f92672"></body></span>
|
||||
<span style="color: #f92672"></html></span>
|
||||
</pre></div>
|
||||
{{< /code >}}
|
||||
|
||||
### Nested shortcode: image gallery
|
||||
|
||||
Hugo's [`.Parent`] shortcode method provides access to the parent shortcode context when the shortcode in question is called within the context of a parent shortcode. This provides an inheritance model.
|
||||
[`Parent`]: /methods/shortcode/parent/
|
||||
|
||||
The following example is contrived but demonstrates the concept. Assume you have a `gallery` shortcode that expects one named `class` argument:
|
||||
|
||||
@ -333,23 +303,24 @@ The following example is contrived but demonstrates the concept. Assume you have
|
||||
You also have an `img` shortcode with a single named `src` argument that you want to call inside of `gallery` and other shortcodes, so that the parent defines the context of each `img`:
|
||||
|
||||
{{< code file=layouts/shortcodes/img.html >}}
|
||||
{{- $src := .Get "src" -}}
|
||||
{{- with .Parent -}}
|
||||
{{ $src := .Get "src" }}
|
||||
{{ with .Parent }}
|
||||
<img src="{{ $src }}" class="{{ .Get "class" }}-image">
|
||||
{{- else -}}
|
||||
{{ else }}
|
||||
<img src="{{ $src }}">
|
||||
{{- end -}}
|
||||
{{ end }}
|
||||
{{< /code >}}
|
||||
|
||||
You can then call your shortcode in your content as follows:
|
||||
|
||||
```go-html-template
|
||||
{{< code file=content/example.md >}}
|
||||
{{</* gallery class="content-gallery" */>}}
|
||||
{{</* img src="/images/one.jpg" */>}}
|
||||
{{</* img src="/images/two.jpg" */>}}
|
||||
{{</* /gallery */>}}
|
||||
{{</* img src="/images/three.jpg" */>}}
|
||||
```
|
||||
{{< /code >}}
|
||||
|
||||
|
||||
This will output the following HTML. Note how the first two `img` shortcodes inherit the `class` value of `content-gallery` set with the call to the parent `gallery`, whereas the third `img` only uses `src`:
|
||||
|
||||
@ -361,62 +332,30 @@ This will output the following HTML. Note how the first two `img` shortcodes inh
|
||||
<img src="/images/three.jpg">
|
||||
```
|
||||
|
||||
## Error handling in shortcodes
|
||||
### Other examples
|
||||
|
||||
Use the [`errorf`] template function with the [`Name`] and [`Position`] shortcode methods to generate useful error messages:
|
||||
For guidance, consider examining Hugo's embedded shortcodes. The source code, available on [GitHub], can provide a useful model.
|
||||
|
||||
{{< code file=layouts/shortcodes/greeting.html >}}
|
||||
{{ with .Get "name" }}
|
||||
<p>Hello, my name is {{ . }}.</p>
|
||||
{{ else }}
|
||||
{{ errorf "The %q shortcode requires a 'name' argument. See %s" .Name .Position }}
|
||||
{{ end }}
|
||||
[GitHub]: https://github.com/gohugoio/hugo/tree/master/tpl/tplimpl/embedded/templates/shortcodes
|
||||
|
||||
## Detection
|
||||
|
||||
The [`HasShortcode`] method allows you to check if a specific shortcode has been called on a page. For example, consider a custom audio shortcode:
|
||||
|
||||
{{< code file=content/example.md >}}
|
||||
{{</* audio src=/audio/test.mp3 */>}}
|
||||
{{< /code >}}
|
||||
|
||||
When the above fails, you will see an `ERROR` message such as:
|
||||
You can use the `HasShortcode` method in your base template to conditionally load CSS if the audio shortcode was used on the page:
|
||||
|
||||
```sh
|
||||
ERROR The "greeting" shortcode requires a 'name' argument. See "/home/user/project/content/_index.md:12:1"
|
||||
```
|
||||
{{< code file=layouts/_default/baseof.html >}}
|
||||
<head>
|
||||
...
|
||||
{{ if .HasShortcode "audio" }}
|
||||
<link rel="stylesheet" src="/css/audio.css">
|
||||
{{ end }}
|
||||
...
|
||||
</head>
|
||||
{{< /code >}}
|
||||
|
||||
## Inline shortcodes
|
||||
|
||||
You can also implement your shortcodes inline -- e.g. where you use them in the content file. This can be useful for scripting that you only need in one place.
|
||||
|
||||
This feature is disabled by default, but can be enabled in your site configuration:
|
||||
|
||||
{{< code-toggle file=hugo >}}
|
||||
[security]
|
||||
enableInlineShortcodes = true
|
||||
{{< /code-toggle >}}
|
||||
|
||||
It is disabled by default for security reasons. The security model used by Hugo's template handling assumes that template authors are trusted, but that the content files are not, so the templates are injection-safe from malformed input data. But in most situations you have full control over the content, too, and then `enableInlineShortcodes = true` would be considered safe. But it's something to be aware of: It allows ad-hoc [Go Text templates](https://golang.org/pkg/text/template/) to be executed from the content files.
|
||||
|
||||
And once enabled, you can do this in your content files:
|
||||
|
||||
```go-html-template
|
||||
{{</* time.inline */>}}{{ now }}{{</* /time.inline */>}}
|
||||
```
|
||||
|
||||
The above will print the current date and time.
|
||||
|
||||
Note that an inline shortcode's inner content is parsed and executed as a Go text template with the same context as a regular shortcode template.
|
||||
|
||||
This means that the current page can be accessed via `.Page.Title` etc. This also means that there are no concept of "nested inline shortcodes".
|
||||
|
||||
The same inline shortcode can be reused later in the same content file, with different arguments if needed, using the self-closing syntax:
|
||||
|
||||
```go-html-template
|
||||
{{</* time.inline /*/>}}
|
||||
```
|
||||
|
||||
[`.Parent`]: /methods/shortcode/parent/
|
||||
[`errorf`]: /functions/fmt/errorf/
|
||||
[`Name`]: /methods/shortcode/name/
|
||||
[`Position`]: /methods/shortcode/position/
|
||||
[built-in shortcode]: /content-management/shortcodes/
|
||||
[figure]: /shortcodes/figure/
|
||||
[lookup order]: /templates/lookup-order/
|
||||
[source organization]: /getting-started/directory-structure/
|
||||
[vimeoexample]: #single-flexible-example-vimeo
|
||||
[youtubeshortcode]: /shortcodes/youtube/
|
||||
[`HasShortcode`]: /methods/page/hasshortcode/
|
||||
|
@ -48,9 +48,7 @@ Hugo's [template lookup order] determines the template path, allowing you to cre
|
||||
[template lookup order]: /templates/lookup-order/
|
||||
|
||||
{{% note %}}
|
||||
You must have thorough understanding of the [template lookup order] when creating templates. Template selection is based on template type, page kind, content type, section, language, and output format.
|
||||
|
||||
[template lookup order]: /templates/lookup-order/
|
||||
You must have thorough understanding of the template lookup order when creating templates. Template selection is based on template type, page kind, content type, section, language, and output format.
|
||||
{{% /note %}}
|
||||
|
||||
The purpose of each template type is described below.
|
||||
@ -88,9 +86,7 @@ Learn more about [base templates](/templates/base/).
|
||||
|
||||
## Home
|
||||
|
||||
A home template renders your site's home page. For a single page site this is the only required template.
|
||||
|
||||
For example, the home template below inherits the site's shell from the base template, and renders the home page content with a list of pages.
|
||||
A home page template is used to render your site's home page, and is the only template required for a single-page website. For example, the home page template below inherits the site's shell from the base template and renders the home page content, such as a list of other pages.
|
||||
|
||||
{{< code file=layouts/_default/home.html >}}
|
||||
{{ define "main" }}
|
||||
@ -103,7 +99,7 @@ For example, the home template below inherits the site's shell from the base tem
|
||||
|
||||
{{% include "templates/_common/filter-sort-group.md" %}}
|
||||
|
||||
Learn more about [home templates](/templates/home/).
|
||||
Learn more about [home page templates](/templates/home/).
|
||||
|
||||
## Single
|
||||
|
||||
@ -241,7 +237,7 @@ For example, the render hook template below adds a `rel` attribute to external l
|
||||
{{- with .Title }} title="{{ . }}"{{ end -}}
|
||||
{{- if $u.IsAbs }} rel="external"{{ end -}}
|
||||
>
|
||||
{{- with .Text | safeHTML }}{{ . }}{{ end -}}
|
||||
{{- with .Text }}{{ . }}{{ end -}}
|
||||
</a>
|
||||
{{- /* chomp trailing newline */ -}}
|
||||
{{< /code >}}
|
||||
@ -260,10 +256,10 @@ For example, the shortcode template below renders an audio element from a [globa
|
||||
{{ end }}
|
||||
{{< /code >}}
|
||||
|
||||
Call the shortcode from your content page:
|
||||
Then call the shortcode from within markup:
|
||||
|
||||
{{< code file=content/example.md >}}
|
||||
{{</* audio src="audio/test.mp3" */>}}
|
||||
{{</* audio src=/audio/test.mp3 */>}}
|
||||
{{< /code >}}
|
||||
|
||||
Learn more about [shortcode templates](/templates/shortcode/).
|
||||
|
Loading…
x
Reference in New Issue
Block a user