[

    {{ $tracks := where .Site.Pages ".Params.type" "track" }}

    {{- range $t_index, $t := $tracks -}}
      {{ if $t_index }}, {{ end }}

      {{ partial "json/page-details.html" $t }} ,

      {{- range $index, $e := .Pages -}}
        {{ if $index }}, {{ end }}
        {{ partial "json/page-details.html" $e }}
      {{ end}}

    {{ end }}

]