Author here. This post arose out of a recent thread on the Hugo Discourse:

https://discourse.gohugo.io/t/hugo-v0-158-0-released/56868

• giancarlostoro

  today at 8:01 PM

  Good call out from that thread is he's trying to get a small change in esbuild added to help with this as well.

  https://github.com/evanw/esbuild/issues/4419

Nice! (But I must say that Zola has this built-in since forever.)