hugo-tufte/layouts/partials/shortcodes/button.html

{{- $context := .context -}}
{{- $color := .color | default "" -}}
{{- $content := .content -}}
{{- $href := (trim .href " ") | default "" -}}
{{- $style := .style | default "default" -}}
{{- if and (not $color) (eq (len $color) 0) -}}
  {{- $style = .style | default "transparent" -}}
{{- end -}}
{{- $target := .target | default "" -}}
{{- $type := .type | default "" -}}
{{- $isButton := false -}}
{{- if or (not $href) (strings.HasPrefix $href "javascript:") -}}
  {{- $isButton = true -}}
  {{- $href = substr $href (len "javascript:") -}}
  {{- if not $type -}}
    {{- $type = "button" -}}
  {{- end -}}
{{- else if and (eq (len $target) 0) (or (strings.HasPrefix $href "http://") (strings.HasPrefix $href "https://") ) -}}
  {{- $target = "_blank" -}}
  {{- if isset $context.Site.Params "externallinktarget" -}}
    {{- $target = $context.Site.Params.externalLinkTarget -}}
  {{- end -}}
{{- end }}
{{- $title := .title | default ($content) | default ($style | T) -}}
{{- $title = trim $title " " -}}
{{- $icon := .icon | default "" -}}
{{- if and (not $icon) (eq (len $icon) 0) -}}
  {{- if eq $style "info" -}}{{ $icon = default "info-circle" }}{{- end -}}
  {{- if eq $style "warning" -}}{{ $icon = default "exclamation-triangle" }}{{- end -}}
  {{- if eq $style "note" -}}{{ $icon = default "exclamation-circle" }}{{- end -}}
  {{- if eq $style "tip" -}}{{ $icon = default "lightbulb" }}{{- end -}}
{{- end -}}
{{- $icon = trim $icon " " -}}
{{- $iconposition := .iconposition | default "left" -}}
{{- with $context -}}
<span class="btn {{ $style }}"{{ if $color }} style="--VARIABLE-BOX-color: {{ $color }};"{{ end }}>

{{ if $isButton -}}
<button{{ if $href }} onclick="{{ $href | safeJS }}"{{ end }}{{ if gt (len $type) 0 }} type="{{ $type }}"{{ end }}>
{{ else -}}
<a{{ if $href }} href="{{ $href }}"{{ if gt (len $target) 0 }} target="{{ $target }}"{{ end }}{{ end }}>
{{- end -}}

  {{ if and $icon (eq $iconposition "left") -}}
  <span class="icon">{{- $icon -}}</span>
  {{- end -}}
  {{- $title | safeHTML -}}
  {{ if and $icon (eq $iconposition "right") -}}
  <span class="icon">{{- $icon -}}</span>
  {{- end -}}

{{ if $isButton -}}
</button>
{{ else -}}
</a>
{{ end -}}
</span>
{{- end -}}

{{/* https://github.com/McShelby/hugo-theme-relearn/blob/main/layouts/shortcodes/button.html */}}