PaperModX/layouts/partials/templates/twitter_cards.html

{{- if .Params.cover.image -}}
  <meta name="twitter:card" content="summary_large_image" />
  {{- if (eq .Params.cover.absolute true) }}
    <meta name="twitter:image" content="{{ .Params.cover.image | absURL }}" />
  {{- else }}
    <meta name="twitter:image" content="{{ (path.Join .RelPermalink .Params.cover.image ) | absURL }}" />
  {{- end}}
{{- else }}
  {{- with $.Params.images -}}
    <meta name="twitter:card" content="summary_large_image"/>
    <meta name="twitter:image" content="{{ index . 0 | absURL }}"/>
  {{ else -}}
    {{- $images := $.Resources.ByType "image" -}}
    {{- $featured := $images.GetMatch "*feature*" -}}
    {{- if not $featured }}{{ $featured = $images.GetMatch "{*cover*,*thumbnail*}" }}{{ end -}}
    {{- with $featured -}}
      <meta name="twitter:card" content="summary_large_image"/>
      <meta name="twitter:image" content="{{ $featured.Permalink }}"/>
    {{- else -}}
      {{- with site.Params.images -}}
        <meta name="twitter:card" content="summary_large_image"/>
        <meta name="twitter:image" content="{{ index . 0 | absURL }}"/>
      {{ else -}}
        <meta name="twitter:card" content="summary"/>
      {{- end -}}
    {{- end -}}
  {{- end }}
{{- end }}

<meta name="twitter:title" content="{{ .Title }}"/>
<meta name="twitter:description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end -}}"/>
{{ with site.Social.twitter -}}
  <meta name="twitter:site" content="@{{ . }}"/>
{{ end -}}