HTMX pulls text from your backend, so normally folks serve HTML snippets... but you could have a bit of js that takes JSON and turns it into HTML in the browser, and HTMX will pull the JSON (or any other text) into the browser, so you could still use it with a JSON api, if you wanted to
I use DRFs renderrers so my Django backend can render either JSON or HTML, so my API is still "restful", it just serves HTML to clients that request HTML like browsers with HTMX and JSON to other clients that request JSON.
