hugo-coder/layouts/partials/head/custom-styles.html

 {{ range .Site.Params.customCSS }}
  {{ if hugo.IsServer }}
    {{ $styles := resources.Get . }}
    <link rel="stylesheet" href="{{ $styles.RelPermalink }}" media="screen">
  {{ else }}
    {{ $styles := resources.Get . | minify | fingerprint }}
    <link rel="stylesheet" href="{{ $styles.RelPermalink }}" integrity="{{ $styles.Data.Integrity }}" crossorigin="anonymous" media="screen" />
  {{ end }}
{{ end }}

{{ range .Site.Params.customSCSS }}
  {{/* We don't change the targetPath to because it's transparent to users */}}
  {{ if hugo.IsServer }}
    {{ $cssOpts := (dict "enableSourceMap" true ) }}
    {{ $styles := resources.Get . | toCSS $cssOpts }}
    <link rel="stylesheet" href="{{ $styles.RelPermalink }}" media="screen">
  {{ else }}
    {{ $styles := resources.Get . | toCSS | minify | fingerprint }}
    <link rel="stylesheet" href="{{ $styles.RelPermalink }}" integrity="{{ $styles.Data.Integrity }}" crossorigin="anonymous" media="screen" />
  {{ end }}
{{ end }}