{{/* Re-usable image partial with alt + size fallback
Usage:
  {{ partial "img.html" (dict "src" "/images/foo.webp" "alt" "Kurzbeschreibung" "class" "img-fluid" "loading" "lazy" "page" .) }}
*/}}
{{- $src := .src -}}
{{- $alt := .alt | default .page.Title -}}
{{- $class := .class -}}
{{- $loading := .loading | default "lazy" -}}

{{- $w := 0 -}}
{{- $h := 0 -}}
{{- $static := printf "static/%s" (strings.TrimLeft "/" $src) -}}
{{- if fileExists $static -}}
  {{- with (imageConfig $static) -}}
    {{- $w = .Width -}}
    {{- $h = .Height -}}
  {{- end -}}
{{- end -}}

<img src="{{ $src | relURL }}"
     alt="{{ $alt | plainify }}"
     loading="{{ $loading }}"
     decoding="async"
     {{ if gt $w 0 }}width="{{ $w }}"{{ end }}
     {{ if gt $h 0 }}height="{{ $h }}"{{ end }}
     class="{{ $class }}">