One of the best cross-platform open source projects I've seen so far is https://makepad.nl https://makepad.nl. - wasm source takes around 2 MB - loads up quic

One of the best cross-platform open source projects I've seen so far is https://makepad.nl https://makepad.nl. - wasm source takes around 2 MB - loads up quickly and it is fast even in mobile browsers - great codebase! - compiles in under a minute (41s on my laptop) inspite being written in Rust Still needs a lot of work to be usable: - missing UI features like proper layouting, configurability etc. - imo font rendering still needs a lot of work; but there are already project in rust which do font rendering right, for instance: (git clone github.com/linebender/druid && cd druid && cargo run --release --example=text) - no animated transitions of UI components Makepad doesn't strive to be UI toolkit, but judging by the way it works already and dedication of the founders it looks really promising.