hugo-theme-stack/layouts/_markup/render-image.html

{{- $image := partial "helper/image" (dict "Resources" .Page.Resources "Image" .Destination) -}}
{{- $alt := .PlainText | safeHTML -}}
{{- $title := .Title | markdownify -}}

{{/* There are some types of images that don't have width and height attributes, such as SVG */}}
{{- $galleryImage := and $image.Height $image.Width -}}

{{- $attributes := dict -}}
{{- if $galleryImage -}}
    {{- $attributes = (dict 
        "data-flex-grow" (div (mul $image.Width 100) $image.Height) 
        "data-flex-basis" (printf "%dpx" (div (mul $image.Width 240) $image.Height))
    ) -}}
{{- end -}}

{{ partial "helper/responsive-image" (dict 
    "Resource" $image.Resource
    "Widths" (cond .Page.Site.Params.ImageProcessing.Content.Enabled .Page.Site.Params.ImageProcessing.Content.Widths nil)
    "Attributes" (merge $attributes (dict 
        "src" $image.Permalink
        "width" $image.Width
        "height" $image.Height
        "alt" $alt
        "title" $title
        "data-title-escaped" ($title | htmlEscape)
        "class" (cond $galleryImage "gallery-image" "")
        "loading" "lazy"
        "sizes" "(max-width: 767px) calc(100vw - 30px), (max-width: 1023px) 700px, (max-width: 1279px) 950px, 1232px"
    ))
) }}