{{/* dict "page" <post> "width" <px> -> URL of the post banner (`banner:`, or `image:`), resized when it is a bundle image */}}
{{- $url := "" -}}
{{- with (.page.Params.banner | default .page.Params.image) -}}
  {{- with $.page.Resources.GetMatch . -}}
    {{- if and (eq .MediaType.MainType "image") (ne .MediaType.SubType "svg") -}}
      {{- $url = (.Resize (printf "%dx" $.width)).RelPermalink -}}
    {{- else -}}
      {{- $url = .RelPermalink -}}
    {{- end -}}
  {{- else -}}
    {{- $url = . -}}
  {{- end -}}
{{- end -}}
{{- return $url -}}