{{ $logoPath:= site.Params.logo }}
{{ $logoWidth:= replace site.Params.logo_width "px" "x" }}

<!-- checking logo existance -->
{{ if $logoPath }}
{{ if fileExists (add `assets/` $logoPath) }}
{{ $logo:= resources.Get $logoPath }}

<!-- logo extention -->
{{ $logoExt := path.Ext $logo }}

<!-- logo height, width (if not svg) -->
{{ if eq $logoExt `.svg` }}
{{ .Scratch.Set "logo-width" "" }}
{{ .Scratch.Set "logo-height" "" }}
{{ else }}
{{ .Scratch.Set "logo-width" $logo.Width }}
{{ .Scratch.Set "logo-height" $logo.Height }}
{{ end }}
{{ $logoDefaultWidth:= .Scratch.Get "logo-width" }}
{{ $logoDefaultHeight:= .Scratch.Get "logo-height" }}

<!-- checking gif -->
{{ if eq $logoExt ".gif" }}
{{ .Scratch.Set "logo" ($logo.Resize $logoWidth).RelPermalink }}
<!-- checking svg -->
{{ else if eq $logoExt ".svg"}}
{{ .Scratch.Set "logo" $logo.RelPermalink }}
<!-- logo processing to webp -->
{{ else }}
{{ $logoDefaultWidth:= add (string $logoDefaultWidth) "x"}}
{{ $logoWidth:= $logoWidth | default $logoDefaultWidth }}
{{ $options := add (string $logoWidth) " webp" }}
{{ .Scratch.Set "logo" ($logo.Resize $options).RelPermalink }}
<!-- logo fallback -->
{{ .Scratch.Set "logo_fallback" ($logo.Resize $logoWidth).RelPermalink }}
{{ end }}

<img loading="prelaod" decoding="async" class="img-fluid logo-up" width="{{replace $logoWidth `x` `` | default $logoDefaultWidth}}" height="{{$logoDefaultHeight}}" src="{{.Scratch.Get `logo`}}" alt="{{ site.Title }}" onerror="this.onerror=null;this.src='{{.Scratch.Get `logo_fallback`}}'">
{{ else }}
<strong class="text-danger">`{{$logoPath}}` doesn't exist</strong>
{{ end }}
<!-- / checking logo existance -->
<!-- logo text -->
{{ else if site.Params.logo_text }}
{{ site.Params.logo_text | markdownify }}
<!-- logo title -->
{{ else }}
{{ site.Title | markdownify }}
{{ end }}