{{- with site.Config.Services.GoogleAnalytics.ID }}
{{- if strings.HasPrefix (lower .) "ua-" }}
{{- warnf "Google Analytics 4 (GA4) replaced Google Universal Analytics (UA) effective 1 July 2023. See https://support.google.com/analytics/answer/11583528. Create a GA4 property and data stream, then replace the Google Analytics ID in your site configuration with the new value." }}