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50 lines
1.1 KiB
Markdown
50 lines
1.1 KiB
Markdown
---
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title: HasShortcode
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description: Reports whether the given shortcode is called by the given page.
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categories: []
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keywords: []
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action:
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related: []
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returnType: bool
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signatures: [PAGE.HasShortcode NAME]
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---
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By example, let's use [Plotly] to render a chart:
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[Plotly]: https://plotly.com/javascript/
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{{< code file=contents/example.md lang=markdown >}}
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{{</* plotly */>}}
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{
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"data": [
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{
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"x": ["giraffes", "orangutans", "monkeys"],
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"y": [20, 14, 23],
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"type": "bar"
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}
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],
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}
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{{</* /plotly */>}}
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{{< /code >}}
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The shortcode is simple:
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{{< code file=layouts/shortcodes/plotly.html >}}
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{{ $id := printf "plotly-%02d" .Ordinal }}
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<div id="{{ $id }}"></div>
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<script>
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Plotly.newPlot(document.getElementById({{ $id }}), {{ .Inner | safeJS }});
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</script>
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{{< /code >}}
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Now we can selectively load the required JavaScript on pages that call the "plotly" shortcode:
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{{< code file=layouts/baseof.html >}}
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<head>
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...
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{{ if .HasShortcode "plotly" }}
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<script src="https://cdn.plot.ly/plotly-2.28.0.min.js"></script>
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{{ end }}
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...
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</head>
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{{< /code >}}
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