Looks like a similar idea to htmx.

I'm all for any tooling which helps people to create stuff. My first job used vb6, and haters aside, it's as powerful as anything else on windows as it has full access to the win32 API. People got shit done with vb6.

htmx enhances HTML with dynamic behavior using attributes like hx-get, letting the server drive updates via HTML fragments. It feels like a modern VB6: fast to prototype, pragmatic, and server-centric.

XMLUI takes a more structured approach: apps are built from declarative XML components with spreadsheet-like reactivity and client-side data binding. It’s closer to composing interfaces from reusable parts than wiring up behaviors.

Hi, this does not seem to work on older browsers. Concept seems interesting but I am afraid it excludes clients who are not on latest devices due to organisational constraints.

Is there a plan to allow wide compatibility?