hugo/docs/content/en/functions/templates/Exists.md

title	description	categories	keywords	menu	function	namespace	relatedFunctions	aliases
templates.Exists	Reports whether a template file exists under the given path relative to the `layouts` directory.	functions		docs parent functions	aliases returnType signatures bool templates.Exists PATH	templates		/functions/templates.exists

A template file is any file living below the layouts directories of either the project or any of its theme components including partials and shortcodes.

The function is particularly handy with dynamic path. The following example ensures the build will not break on a .Type missing its dedicated header partial.

{{ $partialPath := printf "headers/%s.html" .Type }}
{{ if templates.Exists ( printf "partials/%s" $partialPath ) }}
  {{ partial $partialPath . }}
{{ else }}
  {{ partial "headers/default.html" . }}
{{ end }}