I don't love the idea of implementing common app state logic via attributes. It probably works a lot better than I'm assuming, but it feels hacky to me. Like it can't solve every problem you'd actually encounter when making a complex app, so eventually you'll need to fall back to using javascript, and possibly a framework or three...on top of htmx.

But it does seem like this would be fun to play around with using PHP as your backend. No more JSON, or GraphQL, or bloated frameworks, just intermixed code and markup in the same PHP file...just like the good ol' days! For the situations where it does work, this could simplify the architecture of an app significantly.

Also, 10/10 meme page.

EDIT: are there any large and complex projects using this that are publicly accessible?