A hugo shortcode table, have 3 optional arguments, id, class and title.

hugo-shortcode-table.html

{{ $htmlTable := .Inner | markdownify }}
{{ $label := i18n "table_label" | default "Table" }}
{{ $tag := "<table>" }}
{{ $newTag := "<table" }}

{{ with .Get "id" }}
    {{ $newTag = printf "<table id='%s'" . }} 
{{ end }}

{{ with .Get "class" }}
    {{ $newTag = print $newTag " " . }}
{{ end }}

{{ $newTag = print $newTag " itemscope itemtype='https://schema.org/Table'>" }}

{{ with .Get "title" }}
    {{ $caption := printf "<caption itemprop='about'><strong>%s</strong> %s</caption>" $label . }}
    {{ $newTag = print $newTag $caption }}
{{ end }}

{{ $htmlTable := replace $htmlTable $tag $newTag }}

{{ $htmlTable | safeHTML }}
{{/*  inspire by https://gist.github.com/djibe/7a8ba9516f4495dbd6fdf1d1de7a60fe#file-hugo-shortcode-table-html and improved by kuaz */}}