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{{- $alt := .Get "alt" -}}
{{- $res := .Page.Resources.Get (.Get "src") -}}
{{- $ws := slice 480 800 -}}
{{- $srcset := slice -}}
{{- range $ws -}}
{{- if (le . $res.Width) -}}
{{- $w := printf "%dx" . -}}
{{- $url := ($res.Resize $w).RelPermalink | safeURL -}}
{{- $fmt := printf "%s %dw" $url . -}}
{{- $srcset = $srcset | append $fmt -}}
{{- end -}}
{{- end -}}
{{- $set := delimit $srcset "," -}}
<figure>
<img srcset="{{ $set }}" sizes="(max-width: 480px) 480px, 100vw" src="{{ $res.RelPermalink }}" alt="{{ $alt }}"
height="auto" />
<figcaption>{{ $alt }}</figcaption>
</figure>
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