https://htmx.org/extensions/client-side-templates/

however, I would encourage most folks to use HTML as the network format: it typically isn't much more CPU to generate the equivalent HTML string that corresponds to a JSON string (sometimes even less, as with tables)

for pure client-side, htmx is largely hands off. We support an `hx-on` attribute to address the fact that HTML doesn't support general `on*` attributes, but that's it

it does, however, emit a large number of events that you can hook into to extend things:

https://htmx.org/reference/#events

And it plays well w/ scripting solutions like Alpine.js or, our our own scripting solution, _hyperscript: https://hyperscript.org