{{- $items := split (.Get "items") "," -}} {{- $defaultIndex := int ((.Get "defaultIndex") | default "0") -}} {{- $enableSync := site.Params.tabs.sync | default false -}} {{- with .Page.Params.tabsSync }} {{- $enableSync = . -}} {{- end -}} {{- if not $items -}} {{ errorf "no items provided" }} {{- end -}}