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Partly, but it especially means things like Phoenix LiveView[0] or htmx [1]. With these you can create SPA like experiences by sending partial html updates from the server and applying them by some light JS to the UI (which you don't have to write yourself).

[0] https://hexdocs.pm/phoenix_live_view/Phoenix.LiveView.html [1] https://htmx.org/

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The first time I saw the concept codified in a library was in a jquery function that allowed you to replace a part of the DOM. Either the method signature or the documentation pointed you to using it in pairing with AJAX requests.

The first webapp framework I saw it in was Rails (turbolinks). I came to Rails late and didn't stay long so I was never clear how old or how broadly used that feature was. Mostly what I got from Rails was being more comfortable writing NodeJS code, which stole shamelessly from Rails.

i wouldn't call Element.replaceWith a codification of html-over-the-wire

Nor would I. I was talking about load(): http://api.jquery.com/load/

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