web/_includes/jsdelivr-combine.html

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{% assign urls = include.urls | split: ',' %}
{% assign combined_urls = nil %}
{% assign domain = 'https://cdn.jsdelivr.net/' %}
{% for url in urls %}
{% if url contains domain %}
{% assign url_snippet = url | slice: domain.size, url.size %}
{% if combined_urls %}
{% assign combined_urls = combined_urls | append: ',' | append: url_snippet %}
{% else %}
{% assign combined_urls = domain | append: 'combine/' | append: url_snippet %}
{% endif %}
{% elsif url contains '//' %}
<script src="{{ url }}"></script>
{% else %}
<script src="{{ url | relative_url }}"></script>
{% endif %}
{% endfor %}
{% if combined_urls %}
<script src="{{ combined_urls }}"></script>
{% endif %}