authelia/docs/layouts/partials/content/figure.html

{{ $fillImage := .Scratch.Get "fillImage" }}
{{ if not $fillImage -}}
  {{ $fillImage = site.Params.fillImage }}
{{ end -}}

{{ $image := .Resources.GetMatch (printf "**%s" (index .Params.images 0)) }}
{{ if not $image -}}
  {{ $image = resources.Get (printf "%s%s" "images/" site.Params.defaultImage) }}
{{ end -}}

{{ $image = $image.Fill $fillImage }}
{{ $lqip := $image.Resize site.Params.lqipWidth -}}

{{ $imgSrc := "" -}}
{{ $imgSrcSet := slice -}}

{{ $widths := site.Params.landscapePhotoWidths -}}
{{ if gt $image.Height $image.Width -}}
  {{ $widths = site.Params.portraitPhotoWidths -}}
{{ end -}}

{{ range $widths -}}
  {{ $srcUrl := (printf "%dx" . | $image.Resize).Permalink -}}
  {{ if eq $imgSrc "" -}}{{ $imgSrc = $srcUrl -}}{{ end -}}
  {{ $imgSrcSet = $imgSrcSet | append (printf "%s %dw" $srcUrl .) -}}
{{ end -}}
{{ $imgSrcSet = (delimit $imgSrcSet ",") -}}

{{ if gt $image.Width site.Params.smallLimit -}}
  <figure class="figure">
    <img class="figure-img img-fluid lazyload blur-up" data-sizes="auto" src="{{ $lqip.Permalink }}" data-srcset="{{ $imgSrcSet }}" width="{{ $image.Width }}" height="{{ $image.Height }}" alt="{{ .Title }}">
    <noscript><img class="figure-img img-fluid" sizes="100vw" srcset="{{ $imgSrcSet }}" src="{{ $image.Permalink }}" width="{{ $image.Width }}" height="{{ $image.Height }}" alt="{{ .Title }}"></noscript>
    <!-- {{ with .Title }}<figcaption class="figure-caption">{{ . | safeHTML }}</figcaption>{{ end -}} -->
  </figure>
{{ else -}}
  <img class="img-fluid lazyload blur-up" src="{{ $lqip.Permalink }}" data-src="{{ $image.Permalink }}" width="{{ $image.Width }}" height="{{ $image.Height }}" alt="{{ .Title }}">
{{ end -}}