A Flexible Responsive Image Solution for Hugo
While moving my site, I wanted to come up with a better way to handle images. My goal was to design a setup where the images look good on desktops, tablets, and phones. Something that's known as "Responsive Images" in the web industry. The software I moved to doesn't do it out of the box, but with some research, I was able to hack together a solution.
My goals were:
- Store all my images in a single directory
- Store the images at their full size
- Setup so devices don't download images larger than they need in order to make pages load faster
- Automatically resize the image files for different devices to they don't download files that are larger than they need
- Setup so that smaller images are rendered as big as they can be without up-sizing them.
- Prevent images larger than the necessary size from being generated or made available
The code I came up with is:
{{ $img_src := .Get "src" }}
{{ $alt_text := .Get "alt"}}
{{ $caption_text := .Get "caption" }}
{{ with .Site.GetPage "/01-images" }}
{{ $src := .Resources.GetMatch $img_src }}
{{ $raw_image_width := $src.Width }}
{{ $.Scratch.Set "figure_max_width" $raw_image_width }}
{{ if ge ($.Scratch.Get "figure_max_width") 680 }}
{{ $.Scratch.Set "figure_max_width" 680 }}
{{ end }}
{{ $raw_resize_string := (printf "%d%s" $raw_image_width "x") }}
{{ $original_size := $src.Resize $raw_resize_string }}
{{ $image_sizes := slice 680 1000 1400 1800 2648 }}
<div class="image_wrapper">
<figure style='max-width: {{ $.Scratch.Get "figure_max_width" }}px;'>
<img srcset='
{{ $original_size.RelPermalink }} {{ $raw_image_width }}w
{{ range $image_sizes }}
{{ if ge $raw_image_width . }}
,
{{ $resized_image := $src.Resize (printf "%d%s" . "x") }}
{{ $resized_image.RelPermalink }} {{ (printf "%d%s" . "w") }}
{{ end}}
{{ end }}
'>
{{ if $caption_text}}
<figcaption>
{{ $caption_text }}
</figcaption>
{{ end }}
</figure>
</div>
{{ end }}





Usage:
-
Need the style sheet setup (your using Tale with some modifications, but this should work)
-
First create a folder and associated index file to house all the images (e.g. "content/01-images/index.md" )
-
Store any images inside the folder (e.g. "content/01-images/cat-photo.jpg")
-
Call it with:
-
https://code.luasoftware.com/tutorials/hugo/hugo-scope-variable-in-template/
[^2]: The post I found is Responsive Images for Hugo by @stereobooster. There's another similar post with the similar title Responsive Images in Hugo by Adam Wills
NOTE: This is a related post that needs to be combined in here link
Other links to examine:
- https://discourse.gohugo.io/t/easy-way-to-serve-responsive-images-with-hugo/16184
- https://discourse.gohugo.io/t/responsive-images-with-hugo/18483
- https://laurakalbag.com/processing-responsive-images-with-hugo/
- https://www.adamwills.io/blog/responsive-images-hugo/
- https://neuralmarkettrends.com/tutorials/hugo-seo-tutorials/
- https://dev.to/stereobooster/responsive-images-for-hugo-dn9