extern crate wasm_bindgen;
    use wasm_bindgen::prelude::*;
    #[wasm_bindgen]
    extern {
        //在 Rust 中调用来自 JavaScript 的外部函数
        pub fn alert(s: &str);
    }
    //提供外面调用方法
    #[wasm_bindgen]
    pub fn greet(name: &str) {
        alert(&format!("Hello, {}!", name));
    }

打成可以直接调用方式

    wasm-pack build --target web

打包并推送node仓库

    wasm-pack build --scope 仓库名称

    module.exports = {
    //...
    experiments: {
        asyncWebAssembly: true,
    },
    resolve: {
        extensions: ['.wasm'...]
    }
    //...
    }

import init, { greet } from './is_button-wasm/is_button_wasm'
export async function run_wasm(str) {
    await init()
    greet(str)
}