HTMZ:

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When you load a URL into the htmz iframe, the onload handler kicks in. It extracts your destination ID selector from the URL hash fragment and transplants the iframe’s contents (now containing the loaded HTML resource) into your specified destination.

htmz only runs when you invoke it. It does not continually parse your DOM and scan it for special attributes or syntax, nor does it attach listeners in your DOM.

https://leanrada.com/htmz/

OMG yes!