mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
51 lines
1.3 KiB
Markdown
51 lines
1.3 KiB
Markdown
|
---
|
|||
|
|
title: HasShortcode
|
|||
|
|
description: Reports whether the given shortcode is called by the given page.
|
|||
|
|
categories: []
|
|||
|
|
keywords: []
|
|||
|
|
action:
|
|||
|
|
related: []
|
|||
|
|
returnType: bool
|
|||
|
|
signatures: [PAGE.HasShortcode NAME]
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
By example, let's use [MathJax] to render a LaTeX mathematical expression:
|
|||
|
|
|
|||
|
|
[MathJax]: https://www.mathjax.org/
|
|||
|
|
|
|||
|
|
{{< code file=contents/physics/lesson-1.md lang=markdown >}}
|
|||
|
|
Albert Einstein’s theory of special relativity expresses
|
|||
|
|
the fact that mass and energy are the same physical entity
|
|||
|
|
and can be changed into each other.
|
|||
|
|
|
|||
|
|
{{</* math */>}}
|
|||
|
|
$$
|
|||
|
|
E=mc^2
|
|||
|
|
$$
|
|||
|
|
{{</* /math */>}}
|
|||
|
|
|
|||
|
|
In the equation, the increased relativistic mass (m) of a
|
|||
|
|
body times the speed of light squared (c2) is equal to
|
|||
|
|
the kinetic energy (E) of that body.
|
|||
|
|
{{< /code >}}
|
|||
|
|
|
|||
|
|
The shortcode is simple:
|
|||
|
|
|
|||
|
|
{{< code file=layouts/shortcodes/math.html >}}
|
|||
|
|
{{ trim .Inner "\r\n" }}
|
|||
|
|
{{< /code >}}
|
|||
|
|
|
|||
|
|
Now we can selectively load the required CSS and JavaScript on pages that call the "math" shortcode:
|
|||
|
|
|
|||
|
|
|
|||
|
|
{{< code file=layouts/baseof.html >}}
|
|||
|
|
<head>
|
|||
|
|
...
|
|||
|
|
{{ if .HasShortcode "math" }}
|
|||
|
|
<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
|
|||
|
|
<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
|
|||
|
|
{{ end }}
|
|||
|
|
...
|
|||
|
|
</head>
|
|||
|
|
{{< /code >}}
|