Merge commit '35dec7c96f7ee3eb17dd444f7067f0c776fb56ae'

2025-08-18 21:11:19 +02:00 · 2023-12-04 15:24:01 +01:00
parent 9f978d387f 35dec7c96f
commit d19ed4d4e6
810 changed files with 24147 additions and 7766 deletions
--- a/docs/content/en/methods/page/HasShortcode.md
+++ b/docs/content/en/methods/page/HasShortcode.md
@@ -0,0 +1,50 @@
+---
+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 >}}