参考 Passing a JavaScript string to a Rust function compiled to WebAssembly https://stackoverflow.com/questions/49014610/passing-a-javascript-string-to-a-rust-function-compiled-to-webassembly?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa JavaScript と Rust の間でのメモリの共有 http://nmi.jp/2018-03-19-WebAssembly-with-Rust#javascript--rust--1