{{- $reveal_cdn := $.Param "reveal_hugo.reveal_cdn" | default "https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.6.0" -}} {{- $highlight_cdn := $.Param "reveal_hugo.highlight_cdn" | default "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0" -}}