Well it's hard to say because the OP didn't actually specify what state he's storing with JSON. Given we're talking about HTMX, all durable state should be server-side and client-side state should be generated by the server to round-trip back to the server, so it's not really clear why JSON should should be used here. Typically in this context, state is stored server-side, or client-side in input fields or in the URL as parameters (HATEOAS).
What an amazing way of handling state!
Or the part where you use data tags for something that should be done with JSON...