Yeah Rust's wasm-bindgen has integration between Rust async-await and JavaScript promises which doesn't have same restrictions: https://rustwasm.github.io/wasm-

Yeah Rust's wasm-bindgen has integration between Rust async-await and JavaScript promises which doesn't have same restrictions: https://rustwasm.github.io/wasm-bindgen/reference/js-promises-and-rust-futures.html https://rustwasm.github.io/wasm-bindgen/reference/js-promise... However, Asyncify is useful in other scenarios - where you want to shim out an API that is normally synchronous in C / Rust land, with an async JS implementation. async-await, like any coroutine-based mechanism, requires changing every single function in the entire callstack to be async as well, which is usually not feasible in such scenarios (e.g. when shimming out some basic filesystem API). That's where Asyncify helps a lot.