matrix-spec/layouts/_markup/render-passthrough.html

{{- /*

    This is a passthrough render hook (https://gohugo.io/render-hooks/passthrough/).

    We use it to send the delimited passthrough element through KaTeX to render maths
    in the Olm / Megolm spec.

    See: https://gohugo.io/functions/transform/tomath/#step-2

*/ -}}
{{- $opts := dict "output" "htmlAndMathml" "displayMode" (eq .Type "block") }}
{{- with try (transform.ToMath .Inner $opts) }}
  {{- with .Err }}
    {{- errorf "Unable to render mathematical markup to HTML using the transform.ToMath function. The KaTeX display engine threw the following error: %s: see %s." . $.Position }}
  {{- else }}
    {{- .Value }}
    {{- $.Page.Store.Set "hasMath" true }}
  {{- end }}
{{- end -}}