--- /dev/null
+{{/*
+ Taken from https://www.brycewray.com/posts/2022/06/responsive-optimized-images-hugo/
+*/}}
+
+{{- $respSizes := .Site.Params.imageSizes -}}
+{{- $src := .Get "src" -}}
+{{- $source := resources.Get $src -}}
+{{- $alt := .Get "alt" -}}
+{{- $divClass := "" -}}
+{{/*
+ The styling in $imgClass, below, makes
+ an image fill the container horizontally
+ and adjust its height automatically
+ for that, and then fade in for the LQIP effect.
+ Feel free to adjust your CSS/SCSS as desired.
+*/}}
+{{- $imgClass := "w-full h-auto animate-fade" -}}
+{{- $dataSzes := "(min-width: 1024px) 100vw, 50vw" -}}
+{{/*
+ Now we'll create the 20-pixel-wide LQIP
+ and turn it into Base64-encoded data, which
+ is better for performance and caching.
+*/}}
+{{- $LQIP_img := $source.Resize "20x jpg" -}}
+{{- $LQIP_b64 := $LQIP_img.Content | base64Encode -}}
+{{/*
+ $CFPstyle is for use in styling
+ the div's background, as you'll see shortly.
+*/}}
+{{- $CFPstyle := printf "%s%s%s" "background: url(data:image/jpeg;base64," $LQIP_b64 "); background-size: cover; background-repeat: no-repeat;" -}}
+{{/*
+ Then, we create a 640-pixel-wide JPG
+ of the image. This will serve as the
+ "fallback" image for that tiny percentage
+ of browsers that don't understand the
+ HTML `picture` tag.
+*/}}
+{{- $actualImg := $source.Resize "640x jpg" -}}
+<div class="image" style="{{ $CFPstyle | safeCSS }}">
+{{/*
+ Now we'll build the `picture` which modern
+ browsers use to decide which image, and
+ which format thereof, to show. Remember to
+ put `webp` first, since the browser will use
+ the first format it **can** use, and WebP files
+ usually are smaller. After WebP, the fallback
+ is the universally safe JPG format.
+*/}}
+ <picture>
+ <source
+ type="image/webp"
+ srcset="
+ {{- with $respSizes -}}
+ {{- range $i, $e := $respSizes -}}
+ {{- if ge $source.Width . -}}
+ {{- if $i }}, {{ end -}}{{- ($source.Resize (printf "%vx%v" $e " webp") ).RelPermalink }} {{ . }}w
+ {{- end -}}
+ {{- end -}}
+ {{- end -}}"
+ sizes="{{ $dataSzes }}"
+ />
+ <source
+ type="image/jpeg"
+ srcset="
+ {{- with $respSizes -}}
+ {{- range $i, $e := . -}}
+ {{- if ge $source.Width . -}}
+ {{- if $i }}, {{ end -}}{{- ($source.Resize (printf "%vx%v" . " jpg") ).RelPermalink }} {{ . }}w
+ {{- end -}}
+ {{- end -}}
+ {{- end -}}"
+ sizes="{{ $dataSzes }}"
+ />
+ <img class="{{ $imgClass }}"
+ src="{{ $actualImg.RelPermalink }}"
+ width="{{ $source.Width }}"
+ height="{{ $source.Height }}"
+ alt="{{ $alt }}"
+ loading="lazy"
+ />
+ </picture>
+</div>
