39 lines
1.3 KiB
HTML
39 lines
1.3 KiB
HTML
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{{- /*
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Renders a Hugo image resource as an optimised WebP <img> with responsive srcset.
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Parameters:
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res — Hugo image resource (required)
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widths — slice of pixel widths to generate, e.g. (slice 600 1200)
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default: (slice 800 1600)
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sizes — value for the <img sizes> attribute
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default: "100vw"
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class — CSS classes applied to <img>
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alt — alt text (default "")
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loading — "lazy" or "eager" (default "lazy")
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*/ -}}
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{{- $res := .res -}}
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{{- $widths := .widths | default (slice 800 1600) -}}
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{{- $sizes := .sizes | default "100vw" -}}
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{{- $class := .class | default "" -}}
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{{- $alt := .alt | default "" -}}
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{{- $loading := .loading | default "lazy" -}}
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{{- $entries := slice -}}
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{{- $primary := $res -}}
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{{- range $i, $w := $widths -}}
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{{- $img := $res.Resize (printf "%dx webp" $w) -}}
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{{- $entries = $entries | append (printf "%s %dw" $img.RelPermalink $w) -}}
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{{- if eq $i 0 -}}{{- $primary = $img -}}{{- end -}}
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{{- end -}}
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<img
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class="{{ $class }}"
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src="{{ $primary.RelPermalink }}"
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srcset="{{ delimit $entries ", " }}"
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sizes="{{ $sizes }}"
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alt="{{ $alt }}"
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width="{{ $primary.Width }}"
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height="{{ $primary.Height }}"
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loading="{{ $loading }}"
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decoding="async"
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>
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