{{ $size := index (dict
    "1" "text-[1.5em] font-extrabold"
    "2" "text-[1.25em] font-extrabold"
    "3" "text-[1.125em] font-bold"
    "4" "text-[1em] font-bold"
    "5" "text-[0.9em] font-bold"
    "6" "text-[0.875em]") (printf "%d" .Level) }}
<h{{ .Level }}
    id="{{ .Anchor }}"
    class="{{ $size }} {{ with .Attributes.class }} {{ . }}{{ end }}">
  {{- .Text -}}
</h{{ .Level }}>