Docsy Shortcodes

Rather than writing all your site pages from scratch, Hugo lets you define and use shortcodes. These are reusable snippets of content that you can include in your pages, often using HTML to create effects that are difficult or impossible to do in simple Markdown. Shortcodes can also have parameters that let you, for example, add your own text to a fancy shortcode text box. As well as Hugo’s built-in shortcodes, Docsy provides some shortcodes of its own to help you build your pages.

Shortcode delimiters

As illustrated below, using the bracket styled shortcode delimiter, {{<...>}}, tells Hugo that the inner content is HTML/plain text and needs no further processing. By using the delimiter {{%...%}}, Hugo will treat the shortcode body as Markdown. You can use both styles in your pages.

Shortcode blocks

The theme comes with a set of custom Page Block shortcodes that can be used to compose landing pages, about pages, and similar.

These blocks share some common parameters:

height

A pre-defined height of the block container. One of min, med, max, full, or auto. Setting it to full will fill the Viewport Height, which can be useful for landing pages.

color

The block will be assigned a color from the theme palette if not provided, but you can set your own if needed. You can use all of Bootstrap’s color names, theme color names or a grayscale shade. Some examples would be primary, white, dark, warning, light, success, 300, blue, orange. This will become the background color of the block, but text colors will adapt to get proper contrast.

blocks/cover

The blocks/cover shortcode creates a landing page type of block that fills the top of the page.

{{< blocks/cover title="Welcome!" image_anchor="center" height="full" color="primary" >}}
<div class="mx-auto">
	<a class="btn btn-lg btn-primary me-3 mb-4" href="{{< relref "/docs" >}}">
		Learn More <i class="fa-solid fa-circle-right ms-2"></i>
	</a>
	<a class="btn btn-lg btn-secondary me-3 mb-4" href="https://example.org">
		Download <i class="fa-brands fa-github ms-2"></i>
	</a>
	<p class="lead mt-5">This program is now available in <a href="#">AppStore!</a></p>
	<div class="mx-auto mt-5">
		{{< blocks/link-down color="info" >}}
	</div>
</div>
{{< /blocks/cover >}}

Note that the relevant shortcode parameters above will have sensible defaults, but is included here for completeness.

To set the background image, place an image with the word “background” in the name in the page’s Page Bundle. For example, in our the example site the background image in the home page’s cover block is featured-background.jpg, in the same directory.

For available icons, see Font Awesome.

blocks/lead

The blocks/lead block shortcode is a simple lead/title block with centred text and an arrow down pointing to the next section.

{{% blocks/lead color="dark" %}}
TechOS is the OS of the future.

Runs on **bare metal** in the **cloud**!
{{% /blocks/lead %}}

blocks/section

The blocks/section shortcode is meant as a general-purpose content container. It comes in two “flavors”, one for general content and one with styling more suitable for wrapping a horizontal row of feature sections.

The example below shows a section wrapping 3 feature sections.

{{< blocks/section color="dark" type="row" >}}
{{% blocks/feature icon="fa-lightbulb" title="Fastest OS **on the planet**!" %}}
The new **TechOS** operating system is an open source project. It is a new project, but with grand ambitions.
Please follow this space for updates!
{{% /blocks/feature %}}
{{% blocks/feature icon="fa-brands fa-github" title="Contributions welcome!" url="https://github.com/gohugoio/hugo" %}}
We do a [Pull Request](https://github.com/gohugoio/hugo/pulls) contributions workflow on **GitHub**. New users are always welcome!
{{% /blocks/feature %}}
{{% blocks/feature icon="fa-brands fa-twitter" title="Follow us on Twitter!" url="https://twitter.com/GoHugoIO" %}}
For announcement of latest features etc.
{{% /blocks/feature %}}
{{< /blocks/section >}}

blocks/feature

{{% blocks/feature icon="fa-brands fa-github" title="Contributions welcome!" url="https://github.com/gohugoio/hugo" %}}
We do a [Pull Request](https://github.com/gohugoio/hugo/pulls) contributions workflow on **GitHub**. New users are always welcome!
{{% /blocks/feature %}}

blocks/link-down

The blocks/link-down shortcode creates a navigation link down to the next section. It’s meant to be used in combination with the other blocks shortcodes.

<div class="mx-auto mt-5">
	{{< blocks/link-down color="info" >}}
</div>

Shortcode helpers

alert

The alert shortcode creates an alert block that can be used to display notices or warnings.

{{% alert title="Warning" color="warning" %}}
This is a warning.
{{% /alert %}}

Renders to:

pageinfo

The pageinfo shortcode creates a text box that you can use to add banner information for a page: for example, letting users know that the page contains placeholder content, that the content is deprecated, or that it documents a beta feature.

{{% pageinfo color="primary" %}}
This is placeholder content.
{{% /pageinfo %}}

Renders to:

imgproc

The imgproc shortcode finds an image in the current Page Bundle and scales it given a set of processing instructions.

{{% imgproc spruce Fill "400x450" %}}
Norway Spruce *Picea abies* shoot with foliage buds.
{{% /imgproc %}}

Use the syntax above if the inner content and/or the byline parameter of your shortcode is authored in markdown. In case of HTML content, use <> as innermost delimiters: {{< imgproc >}}<b>HTML</b> content{{< /imgproc >}}.

The example above has also a byline with photo attribution added. When using illustrations with a free license from WikiMedia and similar, you will in most situations need a way to attribute the author or licensor. You can add metadata to your page resources in the page front matter. The byline param is used by convention in this theme:

• Front matter:
• toml
• yaml
• json

+++
[[resources]]
src = "**spruce*.jpg"

  [resources.params]
  byline = "*Photo*: Bjørn Erik Pedersen / CC-BY-SA"
+++

---
resources:
- src: "**spruce*.jpg"
  params:
    byline: "*Photo*: Bjørn Erik Pedersen / CC-BY-SA"
---

{
  "resources": [
    {
      "src": "**spruce*.jpg",
      "params": {
        "byline": "*Photo*: Bjørn Erik Pedersen / CC-BY-SA"
      }
    }
  ]
}

swaggerui

You can place the swaggerui shortcode anywhere inside a page with the swagger layout; it renders Swagger UI using any OpenAPI YAML or JSON file as source. This file can be hosted anywhere you like, for example in your site’s root /static folder.

• Front matter:
• toml
• yaml
• json

+++
title = "Pet Store API"
type = "swagger"
weight = 1
description = "Reference for the Pet Store API"
+++

{{< swaggerui src="/openapi/petstore.yaml" >}}

---
title: "Pet Store API"
type: swagger
weight: 1
description: Reference for the Pet Store API
---

{{< swaggerui src="/openapi/petstore.yaml" >}}

{
  "title": "Pet Store API",
  "type": "swagger",
  "weight": 1,
  "description": "Reference for the Pet Store API"
}

{{< swaggerui src="/openapi/petstore.yaml" >}}

You can customize Swagger UI’s look and feel by overriding Swagger’s CSS in themes/docsy/assets/scss/_swagger.scss.

redoc

The redoc shortcode uses the open-source Redoc tool to render reference API documentation from an OpenAPI YAML or JSON file. This can be hosted anywhere you like, for example in your site’s root /static folder, but you can use a URL as well, for example:

---
title: "Pet Store API"
type: docs
weight: 1
description: Reference for the Pet Store API
---

{{< redoc "https://raw.githubusercontent.com/OAI/OpenAPI-Specification/main/examples/v2.0/yaml/petstore.yaml" >}}

iframe

With this shortcode you can embed external content into a Docsy page as an inline frame (iframe) - see: https://www.w3schools.com/tags/tag_iframe.asp

Tabbed panes

Sometimes it’s very useful to have tabbed panes when authoring content. One common use-case is to show multiple syntax highlighted code blocks that showcase the same problem, and how to solve it in different programming languages. As an example, the tabbed pane below shows the language-specific variants of the famous Hello world! program one usually writes first when learning a new programming language:

• C
• C++
• Go
• Java
• Kotlin
• Lua
• PHP
• Python
• Ruby
• Scala

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
  puts("Hello World!");
  return EXIT_SUCCESS;
}

#include <iostream>

int main()
{
  std::cout << "Hello World!" << std::endl;
}

package main
import "fmt"
func main() {
  fmt.Printf("Hello World!\n")
}

class HelloWorld {
  static public void main( String args[] ) {
    System.out.println( "Hello World!" );
  }
}

fun main(args : Array<String>) {
    println("Hello, world!")
}

print "Hello world"

<?php
echo 'Hello World!';
?>

print("Hello World!")

puts "Hello World!"

object HelloWorld extends App {
  println("Hello world!")
}

The Docsy template provides two shortcodes tabpane and tab that let you easily create tabbed panes. To see how to use them, have a look at the following code block, which renders to a right aligned pane with one disabled and three active tabs:

{{< tabpane text=true right=true >}}
  {{% tab header="**Languages**:" disabled=true /%}}
  {{% tab header="English" lang="en" %}}
  ![Flag United Kingdom](flags/uk.png)
  Welcome!
  {{% /tab %}}
  {{< tab header="German" lang="de" >}}
    <b>Herzlich willkommen!</b>
    <img src="flags/de.png" alt="Flag Germany" style="float: right; padding: 0 0 0 0px">
  {{< /tab >}}
  {{% tab header="Swahili" lang="sw" %}}
  ![Flag Tanzania](flags/tz.png)
  **Karibu sana!**
  {{% /tab %}}
{{< /tabpane >}}

This code translates to the right aligned tabbed pane below, showing a Welcome! greeting in English, German or Swahili:

• Languages:
• English
• German
• Swahili

Welcome!

Herzlich willkommen!

Karibu sana!

Shortcode details

Tabbed panes are implemented using two shortcodes: tabpane containing two or more nested tabs.

tabpane

The tabpane shortcode, which is the container element for the tabs, supports the following named parameters, all of which are optional:

• lang: the default code-block language to use for all contained tabs
• highlight: parameter passed on to the code-block highlight function, as described below
• langEqualsHeader: set to true when header text matches the tab language.
• persist: one of header, lang, or disabled
• persistLang: deprecated, use persist instead
• right: set to true if you want right-aligned tabs
• text: set to true if the content of all contained tabs are text. Default is false and assumes the content is code.

The value of the optional parameters lang and highlight are passed on as second LANG and third OPTIONS arguments to Hugo’s built-in highlight function, which is used to render the code blocks of the individual tabs.

Tab selection is persisted by default. When unspecified, persist defaults to header when text=true or lang is set; otherwise persist defaults to lang. To disable tab persistence, set persist=disable.

tab

The tab shortcode represent the tabs you want to show. It supports the following named parameters, all of which are optional:

• header: defines the tab’s header text. When omitted it defaults to text of the form “Tab n”. You can omit the parameter name if it is the only tab parameter:

  {{< tab "My tab header" >}} … {{< /tab >}}
  

• lang: code-block language for code tabs
• highlight: parameter passed on to the code-block highlight function
• right: set to true in order to split tab panes into a left aligned and a right aligned tab groups. Specify right=true in the dividing tab. By using right=true more than once, you can even render multiple tab groups.
• disabled: set to true to disable a tab.
• text: set to true for text tabs. By default tabs are assumed to contain code.

For enabled tabs, there are two modes for content display, code representation and textual representation:

• By default, the tab’s content is rendered as a code block. In order to get proper syntax highlighting, specify the named parameter lang –and optionally the parameter highlight– for each tab. Parameters set in the parent tabpane shortcode will be overwritten.
• If the contents of your tabs should be rendered as text with different styles and optional images, specify text=true as parameter of your tab:

Reminder: If your content is markdown, use the percent sign % as delimiter for your tab shortcode, like this:

{{% tab %}} Your \*\*markdown\*\* content {{% /tab %}}

Card panes

When authoring content, it’s sometimes very useful to put similar text blocks or code fragments on card like elements, which can be optionally presented side by side. Let’s showcase this feature with the following sample card group which shows the first four Presidents of the United States:

George Washington

*1732     †1799

President: 1789 – 1797

John Adams

* 1735     † 1826

President: 1797 – 1801

Thomas Jefferson

* 1743     † 1826

President: 1801 – 1809

James Madison

* 1751     † 1836

President: 1809 – 1817

Docsy supports creating such card panes via different shortcodes:

• The cardpane shortcode which is the container element for the various cards to be presented.
• The card shortcodes, with each shortcode representing an individual card. While cards are often presented inside a card group, a single card may stand on its own, too. A card shortcode can hold programming code, text, images or any other arbitrary kind of markdown or HTML markup as content. In case of programming code, cards provide automatic code-highlighting and other optional features like line numbers, highlighting of certain lines, ….

Shortcode card: textual content

Make use of the card shortcode to display a card. The following code sample demonstrates how to code a card element:

{{< card header="**Imagine**" title="Artist and songwriter: John Lennon" subtitle="Co-writer: Yoko Ono"
          footer="![SignatureJohnLennon](https://server.tld/…/signature.png 'Signature John Lennon')">}}
Imagine there's no heaven, It's easy if you try<br/>
No hell below us, above us only sky<br/>
Imagine all the people living for today…

…
{{< /card >}}

This code translates to the left card shown below, showing the lyrics of John Lennon’s famous song Imagine. A second explanatory card element to the right indicates and explains the individual components of a card:

Imagine

Artist and songwriter: John Lennon

Co-writer: Yoko Ono

Imagine there’s no heaven, It’s easy if you try
No hell below us, above us only sky
Imagine all the people living for today…

Imagine there’s no countries, it isn’t hard to do
Nothing to kill or die for, and no religion too
Imagine all the people living life in peace…

Imagine no possessions, I wonder if you can
No need for greed or hunger - a brotherhood of man
Imagine all the people sharing all the world…

You may say I’m a dreamer, but I’m not the only one
I hope someday you’ll join us and the world will live as one

Header: specified via named parameter Header

Card title: specified via named parameter title

Card subtitle: specified via named parameter subtitle

Content: inner content of the shortcode, this may be plain text or formatted text, images, videos, … . If your content is markdown, use the percent sign % as outermost delimiter of your card shortcode, your markup should look like {{% card %}}Your **markdown** content{{% /card %}}. In case of HTML content, use square brackets <> as outermost delimiters: {{< card >}}Your <b>HTML</b> content{{< /card >}}

Footer: specified via named parameter footer

While the main content of the card is taken from the inner markup of the card shortcode, the optional elements footer, header, title, and subtitle are all specified as named parameters of the shortcode.

Shortcode card: programming code

If you want to display programming code on your card, set the named parameter code of the card to true. The following sample demonstrates how to code a card element with the famous Hello world! application coded in C:

{{< card code=true header="**C**" lang="C" >}}
#include <stdio.h>
#include <stdlib.h>

int main(void)
{
  puts("Hello World!");
  return EXIT_SUCCESS;
}
{{< /card >}}

This code translates to the card shown below:

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
  puts("Hello World!");
  return EXIT_SUCCESS;
}

If called with parameter code=true, the card shortcode can optionally hold the named parameters lang and/or highlight. The values of these optional parameters are passed on as second LANG and third OPTIONS arguments to Hugo’s built-in highlight function which is used to render the code block presented on the card.

Card groups

Displaying two ore more cards side by side can be easily achieved by putting them between the opening and closing elements of a cardpane shortcode. The general markup of a card group resembles closely the markup of a tabbed pane:

{{< cardpane >}}
  {{< card header="Header card 1" >}}
    Content card 1
  {{< /card >}}
  {{< card header="Header card 2" >}}
    Content card 2
  {{< /card >}}
  {{< card header="Header card 3" >}}
    Content card 3
  {{< /card >}}
{{< /cardpane >}}

Contrary to tabs, cards are presented side by side, however. This is especially useful it you want to compare different programming techniques (traditional vs. modern) on two cards, like demonstrated in the example above:

File[] hiddenFiles = new File("directory_name")
  .listFiles(new FileFilter() {
    public boolean accept(File file) {
      return file.isHidden();
    }
  });

File[] hiddenFiles = new File("directory_name")
  .listFiles(File::isHidden);

Include external files

Sometimes there’s content that is relevant for several documents, or that is maintained in a file that is not necessarily a document. For situations like these, the readfile shortcode allows you to import the contents of an external file into a document.

Reuse documentation

In case you want to reuse some content in several documents, you can write said content in a separate file and include it wherever you need it.

For example, suppose you have a file called installation.md with the following contents:

## Installation

{{% alert title="Note" color="primary" %}}
Check system compatibility before proceeding.
{{% /alert %}}

1.  Download the installation files.

1.  Run the installation script

    `sudo sh install.sh`

1.  Test that your installation was successfully completed.

You can import this section into another document:

The following section explains how to install the database:

{{% readfile "installation.md" %}}

This is rendered as if the instructions were in the parent document. Hugo v0.101.0+ is required for imported files containing shortcodes to be rendered correctly.

The following section explains how to install the database:

Installation

Check system compatibility before proceeding.

1. Download the installation files.

2. Run the installation script

   sudo sh install.sh

3. Test that your installation was successfully completed.

The parameter is the relative path to the file. Only relative paths under the parent file’s working directory are supported.

For files outside the current working directory you can use an absolute path starting with /. The root directory is the /content folder.

Include code files

Suppose you have an includes folder containing several code samples you want to use as part of your documentation. You can use readfile with some additional parameters:

To create a new pipeline, follow the next steps:

1.  Create a configuration file `config.yaml`:

    {{< readfile file="includes/config.yaml" code="true" lang="yaml" >}}

1.  Apply the file to your cluster `kubectl apply config.yaml`

This code automatically reads the content of includes/config.yaml and inserts it into the document. The rendered text looks like this:

To create a new pipeline, follow the next steps:

1. Create a configuration file config.yaml:

   apiVersion: tekton.dev/v1beta1
       kind: Task
       metadata:
         name: hello
       spec:
         steps:
           - name: echo
             image: alpine
             script: |
               #!/bin/sh
               echo "Hello World"          
       

2. Apply the file to your cluster kubectl apply config.yaml

The file parameter is the relative path to the file. Only relative paths under the parent file’s working directory are supported.

For files outside the current working directory you can use an absolute path starting with /. The root directory is the /content folder.

Error reporting

If the shortcode can’t find the specified file, the shortcode throws a compile error.

In the following example, Hugo throws a compile error if it can’t find includes/deploy.yml:

{{< readfile file="includes/deploy.yaml" code="true" lang="yaml" >}}

Alternately, Hugo you can display a message on the rendered page instead of throwing a compile error. Add draft="true" as a parameter. For example:

{{< readfile file="includes/deploy.yaml" code="true" lang="yaml" draft="true" >}}

Conditional text

The conditional-text shortcode allows you to show or hide parts of your content depending on the value of the buildCondition parameter set in your configuration file. This can be useful if you are generating different builds from the same source, for example, using a different product name. This shortcode helps you handle the minor differences between these builds.

{{% conditional-text include-if="foo" %}}
This text appears in the output only if `buildCondition = "foo" is set in your config file`.
{{% /conditional-text %}}
{{% conditional-text exclude-if="bar" %}}
This text does not appear in the output if `buildCondition = "bar" is set in your config file`.
{{% /conditional-text %}}

If you are using this shortcode, note that when evaluating the conditions, substring matches are matches as well. That means, if you set include-if="foobar", and buildcondition = "foo", you have a match!