Overhead of calling into JS from Wasm is very low; DOM calls are no problem since the DOM call itself is much slower than the overhead of switching from Wasm to

Overhead of calling into JS from Wasm is very low; DOM calls are no problem since the DOM call itself is much slower than the overhead of switching from Wasm to JS. See e.g. this article from ~4 years ago: https://hacks.mozilla.org/2018/10/calls-between-javascript-and-webassembly-are-finally-fast-%F0%9F%8E%89/ https://hacks.mozilla.org/2018/10/calls-between-javascript-a... There are even some libraries that try to mimic React directly from Rust, such as https://yew.rs/ https://yew.rs/ (though in my experience they can be a bit harder to use than Zaplib, since they require you to learn about traits, closures, etc, and tend to also run into borrow checker issues more often -- all of those are things we try to avoid having to learn in Zaplib!)