{{ $id := .Get "id" | default (printf "figure-%d" .Ordinal) }}
{{ $src := .Get "src" }}
{{ $caption := .Get "caption" }}
{{ $alt := .Get "alt" | default $caption }}
{{ $figures := .Page.Scratch.Get "figures" | default dict }}
{{ $number := add (len $figures) 1 }}
{{ .Page.Scratch.SetInMap "figures" $id $number }}

<figure id="{{ $id }}" class="figure">
  {{ with $src }}
    <img src="{{ . | relURL }}" alt="{{ $alt }}">
  {{ end }}

  {{ if or $caption .Inner }}
    <figcaption>
      <span class="figure-label">Figure {{ $number }}.</span>
      {{ with $caption }}{{ . | markdownify }}{{ else }}{{ .Inner | markdownify }}{{ end }}
    </figcaption>
  {{ end }}
</figure>