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---
title: Custom hugo markdown shortcode
date: 2021-03-22
description: An example of custom hugo shortcode to calculate automatically something
tags:
- hugo
---
## Introduction
On the [about-me]({{< ref "about-me" >}}) page I had hardcoded my age. I wanted a way to calculate it automatically when building the site, here is how to do this.
## Adding the shortcode
Added a custom markdown shortcode in hugo in as simple as creating a `layouts/shortcodes/` directory. Each html file created inside will define a shortcode from the filename. In my example I want to calculate my age so I named the shortcode `age.html` and added the following simple template code :
{{< highlight html >}}
{{ div (sub now.Unix 493473600 ) 31556926 }}
{{< / highlight >}}
The first number is the timestamp of my birthday, the second represents how many seconds there are in a year.
## Using the shortcode
With this `layouts/shortcodes/age.html` file I can just add the following in a page to add my age :
{{< highlight html >}}
{{< print "{{% age %}}" >}}
{{< / highlight >}}
And if you are wondering how I am able to display a shortcode code inside this page without having it render, it is because I defined another shortcode that does exactly that [here](https://git.adyxax.org/adyxax/www/src/branch/master/layouts/shortcodes/print.html)! Hugo really is a powerful static website generator, it is amazing.
## References
* https://gohugo.io/content-management/shortcodes/
* https://github.com/gohugoio/hugo/issues/7561
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