{{- $first := true -}}
{{- range .Resources.ByType "image" -}}
{{- if not $first }}, {{ end }}
{{ $first = false -}}
{
    "title": "{{ .Title }}",
    "url": "{{ .RelPermalink }}",
    "width": "{{ .Width }}",
    "height": "{{ .Height }}",
    "thumbnail": "{{ (.Fit "200x200").RelPermalink }}"
}
{{ end -}}