hugo-snap-gallery/layouts/partials/slideshow.html

{{ $imgs := .imgs }}
{{ $galno := .galno }}
<div class="snap-slideshow" id="snap-slideshow-{{ $galno }}" style="--columns:1;--min-width:0px;--gap:0px;">
  {{ range $i, $img := $imgs }}
  <div class="snap-image">
    <div class="numbertext">{{ add $i 1 }} / {{ len $imgs }}</div>
    <img src="{{ $img }}" onclick="openLightbox({{ $galno }});openLightboxItem({{ $galno }}, {{ add $i 1 }});">
  </div>
  {{ end }}

  <a class="snap-prev" onclick="moveSlideshowItem({{ $galno }}, -1)"><span>&#10094;</span></a>
  <a class="snap-next" onclick="moveSlideshowItem({{ $galno }}, 1)"><span>&#10095;</span></a>
</div>