Hugo Featured Content - using front matter param. example {{< featured-param count=2 >}}

featured-param.html

{{ $count := .Get "count" | default 3 }}
<h3>Featured Posts</h3>
<ul>
  {{ range first $count where (where .Pages "Section" "blog" ) ".Params.featured" "=" true }}
      <li><a href="{{ .Page.RelPermalink }}">{{ .Page.Title }}</a>
      </li>
  {{ end }}
</ul>