congo/layouts/_default/_markup/render-image.html

{{ $url := urls.Parse .Destination }}
{{ $altText := .Text }}
{{ $caption := .Title }}
{{ $lazyLoad := $.Page.Site.Params.enableImageLazyLoading | default true }}
{{ if findRE "^https?" $url.Scheme }}
  <figure>
    <img
      class="mx-auto my-0 rounded-md"
      src="{{ $url.String }}"
      alt="{{ $altText }}" 
      {{ if $lazyLoad }}
        loading="lazy"
      {{ end }}
    />
    {{ with $caption }}<figcaption class="text-center">{{ . | markdownify }}</figcaption>{{ end }}
  </figure>
{{ else }}
  {{ $resource := "" }}
  {{ if $.Page.Resources.GetMatch ($url.String) }}
    {{ $resource = $.Page.Resources.GetMatch ($url.String) }}
  {{ else if resources.GetMatch ($url.String) }}
    {{ $resource = resources.Get ($url.String) }}
  {{ end }}
  {{ with $resource }}
    <figure>
      <picture>
        {{ if ne .MediaType.SubType "svg" }}
          <source 
            {{ if lt .Width 660 }}
              {{ with .Resize (printf "%dx%d webp" .Width .Height) }}
                src="{{ .RelPermalink }}"
              {{ end }}
            {{ else }}
              srcset="
                {{- (.Resize "330x webp").RelPermalink }} 330w,
                {{- (.Resize "660x webp").RelPermalink }} 660w,
                {{- (.Resize "1024x webp").RelPermalink }} 1024w,
                {{- (.Resize "1320x webp").RelPermalink }} 2x"
              src="{{ (.Resize "660x webp").RelPermalink }}" 
            {{ end }}
            type="image/webp" 
          />
        {{ end }}
        <img
          class="mx-auto my-0 rounded-md"
          {{ if eq .MediaType.SubType "svg" }}
            src="{{ .RelPermalink }}"
          {{ else }}
            width="{{ .Width }}"
            height="{{ .Height }}"
            decoding="async"
            {{ if lt .Width 660 }}
              src="{{ .RelPermalink }}"
            {{ else }}
              srcset="
              {{- (.Resize "330x").RelPermalink }} 330w,
              {{- (.Resize "660x").RelPermalink }} 660w,
              {{- (.Resize "1024x").RelPermalink }} 1024w,
              {{- (.Resize "1320x").RelPermalink }} 2x"
              src="{{ (.Resize "660x").RelPermalink }}"
            {{ end }}
          {{ end }}
          alt="{{ $altText }}"
          {{ if $lazyLoad }}
            loading="lazy"
          {{ end }}
        />
      </picture>
      {{ with $caption }}<figcaption class="text-center">{{ . | markdownify }}</figcaption>{{ end }}
    </figure>
  {{ else }}
    <figure>
      <img
        class="mx-auto my-0 rounded-md"
        src="{{ $url.String }}"
        alt="{{ $altText }}"
        {{ if $lazyLoad }}
          loading="lazy"
        {{ end }}
      />
      {{ with $caption }}<figcaption class="text-center">{{ . | markdownify }}</figcaption>{{ end }}
    </figure>
  {{ end }}
{{ end }}